JPS58130280A - Selective chemical removal of hard surface coating from superalloy substrate - Google Patents
Selective chemical removal of hard surface coating from superalloy substrateInfo
- Publication number
- JPS58130280A JPS58130280A JP58007476A JP747683A JPS58130280A JP S58130280 A JPS58130280 A JP S58130280A JP 58007476 A JP58007476 A JP 58007476A JP 747683 A JP747683 A JP 747683A JP S58130280 A JPS58130280 A JP S58130280A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- water
- hard surface
- composition
- surface coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000576 coating method Methods 0.000 title claims description 39
- 239000000758 substrate Substances 0.000 title claims description 27
- 239000011248 coating agent Substances 0.000 title claims description 22
- 239000000126 substance Substances 0.000 title claims description 9
- 229910000601 superalloy Inorganic materials 0.000 title description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 34
- 239000000203 mixture Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 229910052759 nickel Inorganic materials 0.000 claims description 17
- -1 fluorine ions Chemical class 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000919 ceramic Substances 0.000 claims description 10
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- 239000011737 fluorine Substances 0.000 claims description 10
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 claims description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- 238000013019 agitation Methods 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 5
- RILZRCJGXSFXNE-UHFFFAOYSA-N 2-[4-(trifluoromethoxy)phenyl]ethanol Chemical compound OCCC1=CC=C(OC(F)(F)F)C=C1 RILZRCJGXSFXNE-UHFFFAOYSA-N 0.000 claims description 3
- 150000001491 aromatic compounds Chemical class 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- JTDTXGMXNXBGBZ-YVHUGQOKSA-N (2s)-1-[2-[[(2s)-1-[(2s)-2-[[(2s)-1-[(2s)-6-amino-2-[[(2s,3r)-2-amino-3-hydroxybutanoyl]amino]hexanoyl]pyrrolidine-2-carbonyl]amino]-5-(diaminomethylideneamino)pentanoyl]pyrrolidine-2-carbonyl]amino]acetyl]pyrrolidine-2-carboxylic acid Chemical compound C[C@@H](O)[C@H](N)C(=O)N[C@@H](CCCCN)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CCCN=C(N)N)C(=O)N1[C@H](C(=O)NCC(=O)N2[C@@H](CCC2)C(O)=O)CCC1 JTDTXGMXNXBGBZ-YVHUGQOKSA-N 0.000 claims description 2
- 108010046399 TP 7 Proteins 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 29
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 9
- 239000002253 acid Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000005524 ceramic coating Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000010297 mechanical methods and process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 241000894007 species Species 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 238000004299 exfoliation Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 2
- 229910004039 HBF4 Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000981595 Zoysia japonica Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- SOIFLUNRINLCBN-UHFFFAOYSA-N ammonium thiocyanate Chemical compound [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 description 1
- 125000003118 aryl group Chemical class 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 210000003720 plasmablast Anatomy 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K13/00—Etching, surface-brightening or pickling compositions
- C09K13/04—Etching, surface-brightening or pickling compositions containing an inorganic acid
- C09K13/06—Etching, surface-brightening or pickling compositions containing an inorganic acid with organic material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K13/00—Etching, surface-brightening or pickling compositions
- C09K13/04—Etching, surface-brightening or pickling compositions containing an inorganic acid
- C09K13/08—Etching, surface-brightening or pickling compositions containing an inorganic acid containing a fluorine compound
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
Landscapes
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- ing And Chemical Polishing (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Coating By Spraying Or Casting (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はセラζツク、セルメットおよび金摘コーティン
グの高強度高温性金属基体からの除去に関し、さらに詳
しくは、高エネルギー密度攪拌手段を備えた水性酸性剥
離浴を使用したこれらの硬質表面コーティングの超合金
とくにニッケル系基体からの除去に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the removal of Ceramic, Celmet, and Kinzumi coatings from high strength, high temperature metal substrates, and more particularly, using an aqueous acidic stripping bath equipped with high energy density agitation means. It concerns the removal of these hard surface coatings from superalloys, particularly nickel-based substrates.
化学的剥離技術のもつとも困難な要件の一つは「硬質表
面」コーティング、すなわらニッケル系ジェットエンジ
ン燃焼室のような金属表(kHこデトネーシ胃ン・ガン
、グッズマ、および火炎吹付法によシ適用される溶融粒
子コーティングを化学的に除去する組成物を開発するこ
とであった。このよう表コーティングは通常薄層として
適用されて高温の酸化的ガス流条ζ対する保護を与えて
いるが、これらには耐熱性セラζツタ、セルメットおよ
びニッケル系混合物が含まれる。One of the most difficult requirements of chemical stripping techniques is the preparation of "hard surface" coatings, i.e. metal surfaces such as nickel-based jet engine combustion chambers (kH), which can be removed by detonation guns, gas machines, and flame spray methods. The objective was to develop a composition that chemically removes fused particle coatings that are applied to surfaces such as surface coatings, which are typically applied as a thin layer to provide protection against high temperature oxidative gas flow. , these include the heat-resistant Ceramic ivy, Celmet and nickel-based mixtures.
従来技術にはこのようなコーティングをその下にある基
体を損傷せずに迅速にかつ選択的に除去できる効率的表
化学的剥離剤が欠けていた。これまで使用されている技
術の特徴は;−ティングの機械カロエ、研磨、および吹
付研磨のような機械的方法1.ケらびにセラぽツクコー
ティングを軟化するだけの溶液、たとえば塩酸、への化
学的浸漬および溶融塩浴の使用のような非機械的方法に
ある。しかし々がら、m械的方法は非常に時間がかが9
、その上、「先端技術」への適用において頻繁に使用さ
れる金属基体に大きな寸法上の狂いを生じ易いため装置
の非常に高価な部品を損傷し易い。従来の化学的方法に
よシ若干のセラζツクコーティングは軟化するが、引色
続いてセラZツクをその下にある内側接着コーティング
と一緒に機械的に除去することが依然として必要である
。溶融塩浴は操作が面倒であシ、限られた数のコーティ
ングと基体の組み合わせだけに有効であるに過ぎない。The prior art lacks an efficient surface chemical stripper that can rapidly and selectively remove such coatings without damaging the underlying substrate. The characteristics of the techniques used so far are: -Mechanical methods such as mechanical caroing, polishing, and blast polishing1. and non-mechanical methods such as chemical immersion in solutions such as hydrochloric acid and the use of molten salt baths that only soften the ceramic and ceramic coatings. However, mechanical methods are very time consuming.
Moreover, the metal substrates frequently used in "high technology" applications are susceptible to large dimensional deviations that can easily damage very expensive parts of the equipment. Although some ceramic coatings are softened by conventional chemical methods, it is still necessary to mechanically remove the ceramic coating along with the underlying inner adhesive coating. Molten salt baths are cumbersome to operate and are only effective for a limited number of coating and substrate combinations.
を九、これらの技術は除去速度、操作費用および結果の
有効性のすべてにおいて欠陥がある。米国特許第269
8781号は鋼基体から酸化物スケールと電着ニッケル
を除去するのに自効表ニトロ芳香族添加物を含有する硫
酸溶液を開示している。しかしながら、セラζツク、セ
ルメットまたは硬質表向金属コーティングがニッケル系
基体から化学的に除去可能であることを示す教示はない
O
本発明の目的は硬質表面コーティングを畠強度耐高温性
合金基体から除去するための有効な組成物およびそれに
伴々う方法を創出することである。Nine, these techniques are all deficient in removal speed, operating cost, and effectiveness of results. US Patent No. 269
No. 8781 discloses a sulfuric acid solution containing a self-efficacious nitroaromatic additive for removing oxide scale and electrodeposited nickel from steel substrates. However, there is no teaching indicating that Ceramic, Celmet, or hard surface metal coatings can be chemically removed from nickel-based substrates. The object of the present invention is to create effective compositions and associated methods for the same.
本発明の別の目的は硬質耐高温性セラミック、七ルメッ
トお工びニッケル系接着コートをニッケル系基体から選
択的にしかも非腐蝕的に除去するのに有効な組成物およ
びそれに伴逢う方法を)JIJ出することにある。Another object of the present invention is to provide a composition and associated method effective for selectively and non-corrosively removing a hard, high temperature resistant ceramic, nickel-based adhesive coat from a nickel-based substrate. It's about releasing JIJ.
本発明のま九別の目的は剥離処理を受ける1属表面に寸
法の狂いを与えずに硬質表面コーティングだけをジェッ
トエンジン部品の金属表面から選択的に剥離する方法を
案出することにある。Another object of the present invention is to devise a method for selectively stripping hard surface coatings from metal surfaces of jet engine components without causing dimensional deviations on the surfaces undergoing stripping treatment.
本発明の上記目的およびその他の目的は硬質表面コーテ
ィングとくに耐熱性セランツク、セルメットおよびニッ
ケル系コートを高強度耐高温性金属基体とくにニッケル
系基体から選択的に除去するための新規組成物およびそ
れに伴なう方法の発見によシ完成された。@離用組成物
はHp、 、好ましくは約9O−450y/lの濃縮も
0いたと先ば66°Baり比重1.84 C66”Ba
’e1.84Bpac、!!rav、) 、もつとも好
ましくは約250−300 y/l ;約20 y/l
ないし飽和水溶性ニトロ置換芳香族化合物、もつとも好
ましくは約100−1201/1の)タニトロベンゼン
スルホy1!ナトリウム;約0−70 y/lの水溶性
弗素含有種、もつとも好ましくは約1O−20y/lの
フルオロホウNRS約0−1. Ol/lの界面活性剤
、もつとも好まL(d約0−α51/lのジフェニルエ
ーテルスルホン酸塩の群の一種;残部は溶液の約2−9
0重1*の菫の水から成る。The above and other objects of the present invention are to provide a novel composition for selectively removing hard surface coatings, particularly heat resistant selank, celmet and nickel based coatings from high strength, high temperature resistant metal substrates, particularly nickel based substrates; It was completed by the discovery of a method to The release composition should have a concentration of Hp, preferably about 9O-450y/l and a specific gravity of 1.84C66"Ba at 66°Ba.
'e1.84Bpac,! ! rav, ), most preferably about 250-300 y/l; about 20 y/l
to a saturated water-soluble nitro-substituted aromatic compound, preferably about 100-1201/1) tanitrobenzene sulfo y1! Sodium; about 0-70 y/l of water-soluble fluorine-containing species, preferably about 10-20 y/l of fluoroborous NRS about 0-1. Ol/l of surfactant, preferably L (d about 0-α, a member of the group of diphenyl ether sulfonates of 51/l; the remainder being about 2-9 of the solution.
Consists of 0 weight 1* violet water.
本発明の剥離方法は金属基体上の硬質表面コーティング
、通常耐熱性セラ2ツク、セルメツ)tたはニッケル系
コーティングを上記酸性剰畦浴液、好ましくは硫酸、可
溶性弗素含有櫨、可溶性ニトロ置換芳香族化合物、界面
活性剤および水から成る溶液と接触させ、硬質表面コー
ティングが金属表面から選択的に除去されるまでこの接
触を継続する。接触はコーティングの付着した基体を1
20−1807. もつとも好ましくは150−15
0″Fに保つ九溶液浴に、該浴が超音波攪拌手段、もつ
とも好ましくは十分に動力を供給した超音波発生変換器
で少なくとも約4ワツト/ln″、好ましくは約7−8
ワツト乃11の動力密贋に積極的に攪拌されている間に
浸漬することによって行なわれる。コーティングが児全
に除去されたら基体をf#液から取り出し、リンスして
次の加ニーC,’=Mシた状態となる。The stripping method of the present invention involves removing a hard surface coating on a metal substrate, typically a heat-resistant ceramic, ceramic or nickel-based coating, using the above-mentioned acidic residual bath solution, preferably sulfuric acid, soluble fluorine-containing acid, soluble nitro-substituted aromatic contact with a solution consisting of a group compound, a surfactant, and water, and the contact is continued until the hard surface coating is selectively removed from the metal surface. Contact is made with the coated substrate at 1
20-1807. Most preferably 150-15
A nine-solution bath maintained at 0"F is heated to at least about 4 watts/ln", preferably about 7-8" by ultrasonic agitation means, preferably a fully powered ultrasonic generating transducer.
This is done by immersion while being actively stirred by a power source. Once the coating has been completely removed, the substrate is removed from the f# solution, rinsed, and ready for the next application.
周知技術とくにジェットエンジンや航空学的応用など今
ζ有用な超合金を使用するガスタービンエンジンの建造
に関係する「先端技術」1柴&Cおける周知技術には厳
しい高温で酸化的順境にさらされる金属表面を薄い(数
ajl)金14製保1−ノーまたは非金N4製保護層の
コーティングで被覆することが必要である。これらのコ
ーティングはふつう・ 「硬質表面Jコーティングと呼
ばれ、多数の高強度耐蝕性物質のいずれであっても工く
、通常は以下に「保護セラオツク層に対する接着コート
としであるいは保護層自体としてのいずれにも働くこと
のできるニッケルに富む金属混合物」として定義される
「ニッケル系」、セラミック物質またはセルメット、々
らびに若干のこれらの物質の混合物が使用できる。航空
機の燃焼室に保護層として頻繁に使用されるとく4こ硬
質のコーティングは3層系であ91次の組成をもってい
る。Well-known technology, particularly related to the construction of gas turbine engines that use superalloys currently useful in jet engines and aeronautical applications.1 Known technology in Shiba & C includes metals that are exposed to severe oxidative conditions at high temperatures. It is necessary to coat the surface with a thin (several ajl) coating of a gold-14 protective layer or a non-gold N4 protective layer. These coatings are commonly referred to as hard surface coatings and can be made of any of a number of high-strength, corrosion-resistant materials; ``Nickel-based'', defined as ``nickel-rich metal mixtures that can function as either nickel-based materials'', ceramic materials or Celmet, as well as some mixtures of these materials, can be used. The four-hard coating, which is frequently used as a protective layer in aircraft combustion chambers, is a three-layer system and has an order 91 composition.
接着コート+ 3−5lit lNi so*+c
r15%中間:I−): 4−6Li1.Mi80%
−Cr2Q−とMyO−ZrO雪との35−65[金
物
外側コート: /;、−1Q ail 、 Mho−
ZrO。Adhesive coat + 3-5lit lNi so*+c
r15% intermediate: I-): 4-6Li1. Mi80%
-Cr2Q- and MyO-ZrO snow 35-65 [hardware outer coat: /;, -1Q ail, Mho-
ZrO.
ジェットエンジンの燃焼室に適用されはじめた硬質表向
コーティングで特記すべきものは次の通シであるう
ム: ca2s 、Cr 18 %ム112、Yo5
、Hi残部B: Y 安定化ジルコニア
Ct CoCrAIY
nt wi+cr94h ム16、Ylこれらの
硬質表面コーティングは種々の爺属基体(本発明のもつ
とも広い実施WIA様においては酸腐蝕またはアルカリ
腐蝕に抵抗性の任意の金属でよく、さらに詳しくは耐高
温性と高温での高強度の両方をもつ金属超合金)から剥
離できる。とくに、周規律表の第■康に位置する金属す
、りわら鉄、ニッケルおよびコバルトの合金、とく−こ
周知の「Hast・11oyj[Jのよう々ニッケル糸
合金はその上のコーティングが本発明の組成物を使用す
ると剥離される。コーティングは種々の周ml稜術たト
エばデトネーション・ガン、プラズマ噴沙尊および火炎
吹付粒子適用によ)基体に適用さrLる。The hard surface coatings that have begun to be applied to the combustion chambers of jet engines are as follows: ca2s, 18% Cr 112, Yo5
, Hi balance B: Y stabilized zirconia It can be exfoliated from metals (more specifically, metal superalloys that have both high temperature resistance and high strength at high temperatures). In particular, the coating on the nickel thread alloy, such as the well-known Hast. The coating is applied to the substrate using a variety of circumferential techniques (detonation guns, plasma blasts and flame blast particle applications).
これらの周知の適用技術はすべて本質的(こは組成物を
微粉末に磨砕し、溶融状態になるまでこの粉末を加熱し
、ガスプラズマ中で高速に加速された溶融材料を微細な
非常に希薄な金llキストの形で被覆されるべき基体上
に噴霧し、該金RZストが硬化して極度に強靭々保護コ
ーティングを形成することから成る。All of these well-known application techniques essentially consist of grinding the composition into a fine powder, heating this powder until it reaches a molten state, and then turning the molten material, accelerated in a gas plasma, into a fine, very fine powder. It consists of spraying onto the substrate to be coated in the form of a dilute gold RZ cast, which hardens to form an extremely tough protective coating.
本発明はさらに、1紀のように適用されたこれらのコー
ティングを除去するための改良された組成物およびそれ
に伴なう方法に向けられている。The present invention is further directed to improved compositions and associated methods for removing these virginally applied coatings.
強力々化学的剥離剤を有効に機能させるためにはいくつ
かの問題点を最初に克服してνか碌ければ、1らない。In order for a powerful chemical stripping agent to function effectively, it is necessary to overcome several problems first.
剥離用組成物は/fI尾な速度、たとtば1/2 Q
ail /時程度の速度で剥離できなければ′ならず
、またこの方法の実施によシ生じる有毒蒸気を除去する
ために食入9に換気しなければならない。この換気は実
験室しよび工場の双方の環境と適用にしいてつねに主要
々考慮点である。このような溶液は次の組成をもつ水性
酸性浴を創出することによって見出された。すなわら、
硫酸も”4 (任意の市販銘柄で七分であるが、好まし
くは濃縮したもの、九とえば66B4F、)は溶液の必
須成分−1’6ルo i!、80.cD濃度は約9O−
450y/11好ましくは約250−500 y/lの
範囲である。酸が少な過ぎると適当な速度でコーティン
グを除去するのに必要な酸強度が浴に生じないが、−万
、45Qy/lを超える量を使用すると迫力の優れた剥
離結果が得られず、経済的にも正当化で電々い。しかし
−乏から、理論上はH,O,は溶液の90−までを占め
てもよい。The peeling composition has a speed of /fI, for example, 1/2 Q
It must be possible to strip at rates on the order of 300 ml/hour, and the chamber must be ventilated to remove toxic vapors produced by the practice of this process. This ventilation is always a major consideration in both laboratory and factory environments and applications. Such a solution was found by creating an aqueous acidic bath with the following composition: In other words,
Sulfuric acid is also ``4'' (any commercially available brand, but preferably concentrated, 9, e.g. 66B4F), an essential component of the solution -1'6 o i!, 80.cD concentration is about 9O-
450 y/11 preferably in the range of about 250-500 y/l. If too little acid is used, the bath will not have the acid strength necessary to remove the coating at a reasonable rate, but if more than -10,000, 45 Qy/l is used, strong stripping results will not be obtained and economical The justification is electric. However, from -poor to theoretically H, O, may occupy up to 90% of the solution.
剥M溶液中の酸化剤としてa能する第20必須Jj!素
は本発明のもつとも広い実IIIA態様にしいては水溶
性ニトロ置換芳香族化合物、さらに詳しくは米[!it
%許第2698781号に開示された化合物群のような
水溶性ニトロ置換ベンゼン化合物である。もつとも好ま
しくは、メタニトロペ/ビ/スルホン酸ナトリウムまた
は−スルホン酸等、たと、tばニトロペン・ゼンスルホ
ン酸の適当々アルカリ金属塩ま九はアルカリ土類金属塩
(慎能的t、14物としてアンモニウム基を含む)が有
効である。この群の薬品は溶液中で反応促進剤として候
面すると考えられるが、この説に拘束されるものではな
い・
二)Ellllllll化合物の#l11tは約20
y/lないし飽和の範囲でよく、約2O−120y//
で69、高濃度たとえば6O−120y/7がもっとも
好よしい。The 20th essential Jj that acts as an oxidizing agent in the stripping solution! In the broadest embodiment of the present invention, the base is a water-soluble nitro-substituted aromatic compound, more specifically, rice [! it
water-soluble nitro-substituted benzene compounds, such as the compounds disclosed in US Pat. No. 2,698,781. Most preferably, a suitable alkali metal salt or an alkaline earth metal salt (preferably an ammonium group) of nitropene/bisulfonic acid or sodium sulfonic acid is most preferred. ) are valid. It is believed that this group of chemicals acts as a reaction accelerator in solution, but the theory is not intended to be binding. 2) #l11t of the Ellllllll compound is approximately 20
y/l to saturation, about 2O-120y//
69, and a high concentration, for example 6O-120y/7, is most preferred.
必須ではないが好ましい他の浴成分として可溶性弗素含
有*、もつとも好ましくはフルオロホウ酸HBF4を添
加するが、水溶液中で1s11シて低濃度の弗素イオン
を発生することができる他の弗素含M種、たとえばHP
%NH4HF@ 、 N、AlF6 すどが特に好適
である。弗素倉有樵の濃度は溶液中に所望の濃度の弗素
イオンを生じるのに必要な量によって決まるが、水溶液
中で1%離度の高い物質に対しては一般に約0−701
/l 、好ましくは約10−20 y/lの範囲でよい
。弗素イオン濃度が上昇するにつれて基体に対する有害
な腐蝕が起電る機会も増し、@#1m液に添加できる弗
素イオンの量の上限がるる。Other preferred but not essential bath components include soluble fluorine-containing*, preferably fluoroboric acid HBF4, but other fluorine-containing species capable of generating low concentrations of fluorine ions in an aqueous solution; For example, HP
%NH4HF@, N, AlF6 are particularly preferred. The concentration of fluoride ions is determined by the amount required to produce the desired concentration of fluoride ions in solution, but is generally about 0-701 for substances with a high degree of separation of 1% in aqueous solution.
/l, preferably in the range of about 10-20 y/l. As the fluorine ion concentration increases, the chance of harmful corrosion to the substrate increases, and the upper limit of the amount of fluorine ion that can be added to the @#1m solution increases.
必須ではないが、少量たとえば0−五〇 1/l好まし
くは約0− L Oy/lの界面活性剤を含有させて浴
解すべ趣表面への濡れ刑として鋤かせるのが好ましい。Although not essential, it is preferred to include a small amount of a surfactant, such as 0-50 1/l, preferably about 0-L Oy/l, to be applied as a wetting agent to the surface to be dissolved in the bath.
この目的にとくに好ましい化合物はジフェニルエーテル
スルホン酸塩類、たとえば一般式
(式中、Rはアルキル基または水*m子を示し、Xはナ
トリウムのようなアルカリ金属を示す。)の化合物であ
る。このような製品はミシガン州Zツドランド市在ダク
・ケ書カル社にょ13 「Dowfax3B2」という
商品名で市販されている。はとんどのジフェニルエーテ
ルスルホン酸アルカリンタル塩は好適な均等物であ夛、
本発明のもっとも広い実施態様にしいては、剥離液に対
して加水分解安定性しよび酸化安定性をもつ任意の界面
活性剤を許容し得る代讐物として使用できる。@趨用組
成物は2−90重量優の水を添加して浴液を所望の強度
にして完成される。水は剥離溶成の粘度を下げ、溶液中
のイオン種の易動度を上ける。Particularly preferred compounds for this purpose are diphenyl ether sulfonates, such as compounds of the general formula where R represents an alkyl group or water, and X represents an alkali metal such as sodium. Such a product is commercially available under the trade name "Dowfax 3B2," manufactured by Dakke Cal, Inc., Z.D., Michigan. Most diphenyl ether sulfonic acid alkaline tal salts are suitable equivalents;
In the broadest embodiment of the invention, any surfactant that is hydrolytically and oxidatively stable to the stripper solution can be used as an acceptable substitute. @The following composition is completed by adding 2-90% water by weight to bring the bath solution to the desired strength. Water reduces the viscosity of the exfoliation solution and increases the mobility of ionic species in the solution.
硫酸に水を添加すると溶液のキャビテーション閾値、す
なわら溶液に働く局所圧力を溶液の蒸気圧より小さい値
にするのに要する最小の力、を低下させる望ましい効果
をもつ。この閾値は蒸気圧の上昇しよび粘度と希釈密度
の低下によシ起きる。室温の水に対して20KHIK)
いてキャビテーション閾値は2.45 Wlilh”で
ある。Adding water to sulfuric acid has the desirable effect of lowering the cavitation threshold of the solution, ie, the minimum force required to bring the local pressure acting on the solution to a value less than the vapor pressure of the solution. This threshold occurs due to an increase in vapor pressure and a decrease in viscosity and dilution density. 20KHIK for room temperature water)
The cavitation threshold is 2.45Wlih''.
本発明の方法は硬質表面コーティングを酸性剥離溶液と
接触させ、硬質表面コーティングがその下の表面の寸法
変化を起こさずに金属基体から実質的に除去されるまで
その接触を継続することから成る。剥離が許容し得る速
度で起きるためには溶液浴を適当な攪拌手段、好ましく
は磁気歪(好ましい)または圧電変換器(Dいずれかの
超音波発生変換器により連続的に攪拌することが必須で
ある。変換器は約4ワツ) / in”、好ましくは約
7−8ワツト/ *h”の最A・動力密度を生じるよう
に操作し々ければならない。単に従来技術によシ攪拌す
るだけでは有効な速度を生じる(うに必要な溶液攪拌が
@−浴中に生じない。溶液に本来的にエネルギーを供給
する超音波攪拌器と組み合わせて、許容し得る剥離速度
を得るために操作中h7液を約110−180″F、も
つとも好ましくは約150−150”Fの温度に保つこ
とが必要でおる。The method of the present invention comprises contacting the hard surface coating with an acidic stripping solution and continuing the contact until the hard surface coating is substantially removed from the metal substrate without dimensional change of the underlying surface. In order for exfoliation to occur at an acceptable rate, it is essential that the solution bath be continuously stirred by suitable stirring means, preferably an ultrasonic generating transducer, either magnetostrictive (preferred) or piezoelectric transducer (D). The transducer must be operated to produce a maximum A power density of about 4 watts/in", preferably about 7-8 watts/*h". Merely stirring according to conventional techniques does not produce the necessary solution agitation in the bath to produce an effective velocity. In combination with an ultrasonic stirrer that inherently supplies energy to the solution, it is possible to It is necessary to maintain the H7 fluid at a temperature of about 110-180"F, and preferably about 150-150"F, during operation to obtain stripping rates.
以下の実施例によυ本発明をさらに詳細に説明する。The present invention will be explained in more detail with the following examples.
実施例 1
ジェットエンジンに使用された航空機用燃燭器をHap
tall−yX (22Cr、 1a5F#、 9[]
M*51−5”b α6W、残部Ma)で作シ、づ長4
コー)(35ail厚、H1/Cr 95 *)と、中
11コー)(46aal厚、Misas−cr2ocs
とklg。Example 1 Hap an aircraft sconce used in a jet engine.
tall-yX (22Cr, 1a5F#, 9[]
Made with M*51-5"b α6W, remaining Ma), length 4
(35ail thickness, H1/Cr 95*) and medium 11coe) (46aal thickness, Misas-cr2ocs
and klg.
ZrO@の55−36−混合物)と、外側コート(61
0m5?厚、 MyO−ZrO,)とから成る三重層を
520 ilk”にわたって火炎軟性はした。これらの
筒形燃焼室のうら2個は120−1707の範囲の温度
に保った浴中で超音波攪拌を使用して10−16時間コ
ーティングを剥離した。2基の1200ワット側面載置
式浸漬可能超廿技4(換器1rする30ガロンステ/レ
ス@製熱水タンクを@離操作時に使用し、四角いポリプ
ロピレン製容器に収容された剥離溶液(275yXl
CDH,o、 66B−′、14 yXlの”’4(4
8嘩)、120gAの轟−ニトロベンゼンスルホン酸す
17)Ah α1 yXlのDawfaz −3B 2
)を6ガロン使用した。金属組織学的検査をしたとこ
ろ筒形燃焼室の基体に破壊は少しもみられ々かった。55-36-mixture of ZrO@) and an outer coat (61
0m5? The flame softening was carried out over 520 ilk'' of triple layers consisting of 520 ilk (thick, MyO-ZrO, The coating was removed for 10-16 hours. Two 1200 watt side-mounted submersible ultra-high water tanks with 1 liter of 30 gallon hot water tanks were used during the release operation and a square polypropylene Stripping solution (275yXl) contained in a container made of
CDH, o, 66B-', 14 yXl''4 (4
8), 120 gA of Dawfaz-nitrobenzenesulfonic acid 17) Ah α1 yXl of Dawfaz-3B 2
) was used for 6 gallons. A metallographic examination revealed no damage to the base of the cylindrical combustion chamber.
実施例 2
軍用ジェットのエンジンの筒形燃焼室を275y/’
Oa (ilt 酸Ha” oa (66°”) 、1
45 g/lのフルオロホウ酸IIBF4(48チ)、
J?よび116、g7t ノメタニトロベンゼンスルホ
ン酸ナトリウムを含有する剥離溶液に浸漬した。130
−1707で20時間経過後、〈(−ナー筒から6層の
コーティングを除去した。1000ワツトの底部載置式
超音波変換器を取付は剥離溶液2ガロンを四角いポリプ
ロピレン製容器に収容した5ガロンのステンレス鋼製タ
ンクを使用した。基体の破壊は見られなかつ九。Example 2 The cylindrical combustion chamber of a military jet engine is 275y/'
Oa (ilt acid Ha" oa (66°"), 1
45 g/l fluoroboric acid IIBF4 (48 ti),
J? and 116, g7t immersed in a stripping solution containing sodium nometanitrobenzene sulfonate. 130
After 20 hours with 1707, 6 layers of coating were removed from the 1000 watt bottom-mounted ultrasonic transducer and 2 gallons of stripping solution was placed in a 5 gallon square polypropylene container. A stainless steel tank was used. No damage to the base was observed.
ニューヨーク州つェストペリ市在メトコ社の製品メトコ
(Mgtce) 445を肢覆したHajte((ey
!片を90 !/lの濃硫酸H,80,(66°Be’
)、72 yXlのメタニトロベンゼンスルホ/1波ナ
トリウム、 46 yXlの硫酸ナトリウムyα會日0
4、トよび1.2 l/lのチオシアン酸アンモニウム
をkHl、ticH含有する剥離溶液に浸漬した。Hajte ((ey
! 90 pieces! /l of concentrated sulfuric acid H, 80, (66°Be'
), 72 yXl of metanitrobenzene sulfo/1 wave sodium, 46 yXl of sodium sulfate yα day 0
4. 1.2 l/l ammonium thiocyanate was immersed in a stripping solution containing kHl and ticH.
45分間145−150″Fで超音波攪拌すると数屡i
l厚のコーティングが試験片から除去された。Ultrasonic agitation at 145-150″F for 45 minutes produces several
1 thick coating was removed from the specimen.
本発明によれば、セラミック、セルメットレよびニッケ
ル系物質を金属とくにニッケル系超合金から金!Ij4
基体に許容し得〕ケい寸法上または構造上の変化をひき
起こさずに除去することができるだけでなく、広範囲の
硬質表面コーティングをこれらの基体からその下にある
材料に損傷を与tずに除去することができる。According to the invention, ceramics, celmetres and nickel-based materials can be converted from metals, especially nickel-based superalloys to gold! Ij4
Not only can a wide range of hard surface coatings be removed from these substrates without causing any dimensional or structural changes, but also can be removed from these substrates without damaging the underlying materials. Can be removed.
明らかに、上記説明に照らして本発明に11々の変更を
加えることかり能である。従って%FIiJ記特許請求
の範囲内で本発明を上記の説明とは異7デつ丸線様で実
施することができる。Obviously, eleven modifications may be made to the invention in light of the above description. Therefore, within the scope of the appended claims, the invention can be practiced in a different manner from the above description.
第1頁の続き
0発 明 者 デブラ・ニー・バーンズアメリカ合衆国
イリノイ州ラン
バード・サウス・ルウイス・ア
ベニュー242Continued from page 1 0 Inventor Debra Nee Burns 242 South Lewis Avenue, Lombard, Illinois, United States of America
Claims (1)
トロ置換芳香族化合物を約2O−240y/l含有し、
残部水から成ることを特徴とする、高強度耐高温性基質
から硬質表面金属コーティング、とくにセラミック、セ
ルメットおよびニッケル系混合物を選択的に除去するた
めの組成物。 (2) 解離して溶液中に弗素イオン源を生じる水溶
性弗素含有橿約0−70y/lをさらに含有することを
特徴とする特許請求の範囲第1項記載の組成物。 とを特徴とする特許請求の範囲第2項記載の組成物。 14) !1.$0.を約250−300y/l、水
溶性= ) 1−置換ベンゼン化合物を約6O−120
y/1.、’4離して溶液中に弗素イオン源を生じる水
溶性弗素含有[を約10−20 y/l 、 シアエニ
ルエーテルスルホン酸の群から選ばれた界面活性剤を約
0−1.Op/lを含有し、残部水から成ることを#黴
とする、高強度耐高温性基質から硬質表面コーティング
、とくにセラtツク、セルメットおよびニッケル系混合
物を選択的に除去するための組成物。 +5) H−Oaを約270−281/7含有するこ
とを特徴とする特許請求の範囲第4項記載の−d成物。 (6)水溶性ニド−置換ベンゼン化合物としてメタニト
ロベンゼンスルホン酸ナトリウムを約101)−120
y/l含有することを特徴とする特許請求の範囲第6項
記載の組成物。 (7) 水溶性弗素含有種としてフルオロホウ酸を約
10−20 L/l含有することを特徴とする、時計請
求の範囲第4項記載の組成物。 +8) ジフェニルエーテルスルホン酸塩としてジフ
ェニルエーテルスルホン酸ナトリクムを約0−α5シク
含有することを特徴とする特許請求の範囲第4項記載の
組成物。 (9)硬質表面コーティングを液温約120−180F
に保たれ連続的に超音波攪拌手段で攪拌された適当な収
容手段内で、特許請求の範囲第1項記載の酸性剥離溶液
と接触させ、硬質表面コーティングがその下にある金属
基体を損傷せずに該金属基体から実質的除去されるまで
上記接触を継続し、ついで該基体を該溶液浴から取り出
すことを特徴とする、セランツク、セルメットおよびニ
ッケル系混合物をぎむ硬質表面コーティングを高強度耐
高温性基体から選択的に除去する方法。 ulJ 操作中、該溶液の温度を約1.30−150
7’に保つことを特徴とする特許請求の範囲第9項記載
の方法。 an 該超音波攪拌手段が、操作中央なくとも4ワツ
ト/♂の動力密度を溶液に連続的に供給する超音波発生
変換器であることを特徴とする特許請求の範囲第9項記
載の方法。 Uシ 該変換器を動力密度的7−8ワツ) / i+&
”に保つことを特徴とする特許請求の範VB第11項に
記載の方法。 α1 該溶液浴の組成が特許請求の範囲第4JAd己収
の組成であることを特徴とする特許請求の範囲第9項記
載の方法。[Claims] (1) Contains about 90-450 p/l of ``-04 and about 20-240 y/l of a water-soluble nitro-substituted aromatic compound,
A composition for the selective removal of hard surface metal coatings, in particular ceramic, Celmet and nickel-based mixtures, from high strength, high temperature resistant substrates, characterized in that the remainder consists of water. 2. The composition of claim 1, further comprising about 0-70 y/l of water-soluble fluorine-containing particles which dissociate to form a source of fluorine ions in solution. The composition according to claim 2, characterized in that: 14)! 1. $0. about 250-300 y/l, water solubility = ) 1-substituted benzene compound about 6O-120
y/1. , a water-soluble fluorine-containing [about 10-20 y/l], which produces a source of fluorine ions in solution, separated by about 0-1. A composition for selectively removing hard surface coatings, particularly Ceramic, Celmet and nickel-based mixtures, from high strength, high temperature resistant substrates, containing Op/l and the balance consisting of water. +5) The -d product according to claim 4, which contains about 270-281/7 H-Oa. (6) Sodium metanitrobenzene sulfonate as a water-soluble nido-substituted benzene compound at about 101)-120
The composition according to claim 6, characterized in that it contains y/l. (7) A composition according to claim 4, characterized in that it contains about 10-20 L/l of fluoroboric acid as the water-soluble fluorine-containing species. +8) The composition according to claim 4, which contains about 0-α5s of sodium diphenyl ether sulfonate as the diphenyl ether sulfonate. (9) Hard surface coating liquid temperature about 120-180F
The hard surface coating is brought into contact with the acidic stripping solution of claim 1 in a suitable container maintained at a constant temperature and continuously agitated by ultrasonic agitation means so that the hard surface coating does not damage the underlying metal substrate. A hard surface coating containing a selank, celmet and nickel based mixture is coated with a high strength, high temperature resistant coating, characterized in that the contacting is continued until the metal substrate is substantially removed from the metal substrate, and the substrate is then removed from the solution bath. A method for selectively removing chemical substances from a substrate. During the ulJ operation, the temperature of the solution is approximately 1.30-150
9. The method according to claim 9, characterized in that the temperature is maintained at 7'. 10. The method of claim 9, wherein the ultrasonic agitation means is an ultrasonic generating transducer that continuously supplies the solution with a power density of at least 4 watts/male during operation. The power density of the converter is 7-8 watts) / i+&
The method according to claim VB, item 11, characterized in that the composition of the solution bath is a self-contained composition of claim 4, JAd. The method described in Section 9.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US34196582A | 1982-01-22 | 1982-01-22 | |
US341965 | 1982-01-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58130280A true JPS58130280A (en) | 1983-08-03 |
JPS6261670B2 JPS6261670B2 (en) | 1987-12-22 |
Family
ID=23339766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58007476A Granted JPS58130280A (en) | 1982-01-22 | 1983-01-21 | Selective chemical removal of hard surface coating from superalloy substrate |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS58130280A (en) |
AU (1) | AU546054B2 (en) |
BE (1) | BE895241A (en) |
CA (1) | CA1185152A (en) |
CH (1) | CH651849A5 (en) |
DE (1) | DE3248006A1 (en) |
ES (1) | ES519129A0 (en) |
FR (1) | FR2520374B1 (en) |
GB (1) | GB2115013B (en) |
IT (1) | IT1164864B (en) |
SE (1) | SE8207490L (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4113283C2 (en) * | 1991-04-24 | 1994-05-05 | Kernforschungsz Karlsruhe | Use of an etching solution for the selective etching of a metallic sacrificial layer in the production of microstructures |
DE4219667C2 (en) * | 1992-06-16 | 1994-12-01 | Kernforschungsz Karlsruhe | Tool and method for producing a microstructured plastic layer |
US6494960B1 (en) | 1998-04-27 | 2002-12-17 | General Electric Company | Method for removing an aluminide coating from a substrate |
US5976265A (en) * | 1998-04-27 | 1999-11-02 | General Electric Company | Method for removing an aluminide-containing material from a metal substrate |
GB9814075D0 (en) * | 1998-06-29 | 1998-08-26 | Ge Aircraft Engine Services Li | Method of stripping a coating from an aircraft engine part |
DE19833990A1 (en) * | 1998-07-29 | 2000-02-10 | Metallgesellschaft Ag | Mordant for stainless steels |
US6379749B2 (en) | 2000-01-20 | 2002-04-30 | General Electric Company | Method of removing ceramic coatings |
US6238743B1 (en) * | 2000-01-20 | 2001-05-29 | General Electric Company | Method of removing a thermal barrier coating |
US6833328B1 (en) | 2000-06-09 | 2004-12-21 | General Electric Company | Method for removing a coating from a substrate, and related compositions |
US6863738B2 (en) | 2001-01-29 | 2005-03-08 | General Electric Company | Method for removing oxides and coatings from a substrate |
US6953533B2 (en) | 2003-06-16 | 2005-10-11 | General Electric Company | Process for removing chromide coatings from metal substrates, and related compositions |
US20070116875A1 (en) * | 2005-11-22 | 2007-05-24 | United Technologies Corporation | Strip process for superalloys |
CN102978631B (en) * | 2011-09-06 | 2014-12-10 | 沈阳黎明航空发动机(集团)有限责任公司 | Precise titanium alloy part re-melted layer removing method |
IT202100025232A1 (en) * | 2021-10-01 | 2023-04-01 | T A G Srl | METHOD OF REMOVING A CERAMIC THERMAL BARRIER COATING |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52114536A (en) * | 1976-03-22 | 1977-09-26 | Oxy Metal Industries Corp | Method of foliating electroplated layer of nickel alloy and composition and solution used therefor |
JPS52133830A (en) * | 1976-05-04 | 1977-11-09 | Nihon Kagaku Kizai Kk | Metal coat exfoliating solution |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2698781A (en) * | 1953-04-27 | 1955-01-04 | Enthone | Accelerating action of acids on metals |
DE1926228C3 (en) * | 1969-05-22 | 1974-02-21 | Bergische Metallwarenfabrik Dillenberg & Co Kg, 5601 Gruiten | Bath for the electrolytic removal of metal coatings made of nickel or chrome from base bodies made of non-ferrous metal |
DE2824975A1 (en) * | 1978-06-07 | 1979-12-20 | Basf Ag | Additive for etching, polishing and demetallisation bath - comprises a reaction prod. of ethylene! oxide-propylene! oxide copolymer and poly:amine |
GB2066386B (en) * | 1979-12-26 | 1983-10-12 | Gen Electric | Filler removal method |
US4302246A (en) * | 1980-01-03 | 1981-11-24 | Enthone, Incorporated | Solution and method for selectively stripping alloys containing nickel with gold, phosphorous or chromium from stainless steel and related nickel base alloys |
JPS579874A (en) * | 1980-06-17 | 1982-01-19 | Toshiba Corp | Etching solution for nickel |
-
1982
- 1982-11-10 CA CA000415360A patent/CA1185152A/en not_active Expired
- 1982-11-12 AU AU90416/82A patent/AU546054B2/en not_active Ceased
- 1982-12-03 BE BE0/209645A patent/BE895241A/en not_active IP Right Cessation
- 1982-12-20 CH CH7416/82A patent/CH651849A5/en not_active IP Right Cessation
- 1982-12-24 DE DE19823248006 patent/DE3248006A1/en not_active Withdrawn
- 1982-12-29 SE SE8207490A patent/SE8207490L/en not_active Application Discontinuation
-
1983
- 1983-01-18 GB GB08301268A patent/GB2115013B/en not_active Expired
- 1983-01-19 FR FR8300786A patent/FR2520374B1/en not_active Expired
- 1983-01-20 ES ES519129A patent/ES519129A0/en active Granted
- 1983-01-21 JP JP58007476A patent/JPS58130280A/en active Granted
- 1983-01-21 IT IT47598/83A patent/IT1164864B/en active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52114536A (en) * | 1976-03-22 | 1977-09-26 | Oxy Metal Industries Corp | Method of foliating electroplated layer of nickel alloy and composition and solution used therefor |
JPS52133830A (en) * | 1976-05-04 | 1977-11-09 | Nihon Kagaku Kizai Kk | Metal coat exfoliating solution |
Also Published As
Publication number | Publication date |
---|---|
JPS6261670B2 (en) | 1987-12-22 |
IT1164864B (en) | 1987-04-15 |
ES8402624A1 (en) | 1984-02-01 |
DE3248006A1 (en) | 1983-07-28 |
SE8207490L (en) | 1983-07-23 |
ES519129A0 (en) | 1984-02-01 |
GB8301268D0 (en) | 1983-02-16 |
GB2115013B (en) | 1985-12-18 |
FR2520374B1 (en) | 1988-06-24 |
SE8207490D0 (en) | 1982-12-29 |
FR2520374A1 (en) | 1983-07-29 |
AU546054B2 (en) | 1985-08-15 |
CA1185152A (en) | 1985-04-09 |
BE895241A (en) | 1983-03-31 |
GB2115013A (en) | 1983-09-01 |
CH651849A5 (en) | 1985-10-15 |
AU9041682A (en) | 1983-07-28 |
IT8347598A0 (en) | 1983-01-21 |
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