JPH02159394A - Manganese-iron alloy electroplated steel sheet having high corrosion resistance in environment causing salt damage and also having superior spot weldability - Google Patents
Manganese-iron alloy electroplated steel sheet having high corrosion resistance in environment causing salt damage and also having superior spot weldabilityInfo
- Publication number
- JPH02159394A JPH02159394A JP63313018A JP31301888A JPH02159394A JP H02159394 A JPH02159394 A JP H02159394A JP 63313018 A JP63313018 A JP 63313018A JP 31301888 A JP31301888 A JP 31301888A JP H02159394 A JPH02159394 A JP H02159394A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion resistance
- steel sheet
- manganese
- iron alloy
- spot weldability
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 238000005260 corrosion Methods 0.000 title claims abstract description 35
- 230000007797 corrosion Effects 0.000 title claims abstract description 35
- 229910000640 Fe alloy Inorganic materials 0.000 title claims abstract description 20
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 title claims description 14
- 150000003839 salts Chemical class 0.000 title abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 38
- 238000007747 plating Methods 0.000 claims description 21
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 12
- 229910052748 manganese Inorganic materials 0.000 claims description 12
- 239000011572 manganese Substances 0.000 claims description 12
- 239000010960 cold rolled steel Substances 0.000 abstract description 10
- 238000009713 electroplating Methods 0.000 abstract description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 10
- 239000000956 alloy Substances 0.000 description 10
- 239000011701 zinc Substances 0.000 description 10
- 229910052725 zinc Inorganic materials 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 235000002639 sodium chloride Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 3
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- -1 20 μm) Substances 0.000 description 1
- 229910021380 Manganese Chloride Inorganic materials 0.000 description 1
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- 235000002867 manganese chloride Nutrition 0.000 description 1
- 239000011565 manganese chloride Substances 0.000 description 1
- 229940099607 manganese chloride Drugs 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ｍＦｉ表面に電気めっきによってマンガン−
鉄合金めっきを施すことにより、塩害環境下で優れた耐
食性を有しかつスポット溶接性に優れた自動車用の表面
処理鋼板に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention provides manganese-based electroplating on the mFi surface.
The present invention relates to a surface-treated steel sheet for automobiles which has excellent corrosion resistance in a salt-damaged environment and has excellent spot weldability by applying iron alloy plating.
〈従来の技術〉
一般に、自動車用鋼板は成形加工後、スポット溶接によ
り接合され、ホワイトボディと称される状態でリン酸塩
化成処理、電着塗装される０次いで外板には中塗、上塗
が施される。したがって鋼板に要求される特性としては
、加工性、溶接性。<Conventional technology> Generally, after forming and processing automobile steel sheets, they are joined by spot welding, and then subjected to phosphate chemical conversion treatment and electrodeposition coating in a state called body-in-white.Then, the outer panels are coated with an intermediate coat and a top coat. administered. Therefore, the characteristics required of steel plates are workability and weldability.
化成処理性、塗装性および耐食性があるが、めっきが原
因して解決が困難なこととして溶接性と耐食性がある。It has chemical conversion treatability, paintability, and corrosion resistance, but weldability and corrosion resistance are difficult to resolve due to plating.
特に冬期に道路の凍結防止用に多量の岩塩を散布する寒
冷融雪塩散布地域は、大量の自動車使用社会であり、そ
のため自動車車体の腐食は大きな社会問題となっている
。 １９８１年には、カナダ政府は自動車メーカーに対
して車体防錆義務を課し、穴あき腐食ｌＯ年、外面ｔ４
＃５年の保証を目標としている。また、アメリカでも同
様の規制を始めている。In particular, areas where large amounts of rock salt are sprayed to prevent roads from freezing during the winter are areas where large amounts of automobiles are used, and therefore corrosion of automobile bodies has become a major social problem. In 1981, the Canadian government imposed a duty on car manufacturers to prevent rust on car bodies.
# We are aiming for a 5 year warranty. Similar regulations have also begun in the United States.
このため高耐食性を有する亜鉛系の合金めっき鋼板や複
合めっき！ｉｌ板が種々開発され、多くの特許も公開さ
れているが、現在実用化されつつあるのは、亜鉛−鉄合
金および亜鉛−ニッケル合金めっき鋼板である。For this reason, zinc-based alloy plated steel sheets and composite plating have high corrosion resistance! Although various IL plates have been developed and many patents have been published, the ones that are currently being put into practical use are zinc-iron alloy and zinc-nickel alloy plated steel plates.
他方、マンガンを基本成分とした合金および多層めっき
が報告されており、優れた耐食性を示すと言われている
０例えば、特公昭６０−２６８３５号公報には亜鉛−マ
ンガン合金電気めっき鋼板が、また特公昭５７−５８７
９号公報には亜鉛めっき上にマンガンめっきをした二層
めっき鋼板が開示されている。On the other hand, alloys and multilayer platings containing manganese as a basic component have been reported, and are said to exhibit excellent corrosion resistance. Special Public Service 1987-587
Publication No. 9 discloses a double-layer plated steel sheet in which manganese plating is applied on zinc plating.
〈発明が解決しようとするｔ！１Ｍ＞
しかし、前記亜鉛−鉄合金めっき鋼板は塗装後耐食性は
良いものの、裸耐食性は良くない、また亜鉛−ニッケル
合金めっきは裸耐食性には優れているものの、塗装後耐
食性に問題がある。<The invention tries to solve the problem! 1M> However, although the zinc-iron alloy plated steel sheet has good corrosion resistance after painting, its bare corrosion resistance is poor, and although the zinc-nickel alloy plating has excellent bare corrosion resistance, it has a problem with its corrosion resistance after painting.
また、特に上記の両合金めっき鋼板に共通する欠点は、
スポット溶接性が従来の冷延鋼板よりかなり劣ることで
ある。このことは高度に自動化された自動車生産工程に
おいては極めて大きな問題である。In addition, the drawbacks that are common to both of the above-mentioned alloy plated steel sheets are:
The spot weldability is considerably inferior to that of conventional cold-rolled steel sheets. This is a very big problem in highly automated automobile production processes.
また、前記の特公昭６０−２６８３５号公報５特公昭５
７５８７９号公報のめっき鋼板は、いずれも合金元素と
して亜鉛を含むものであり、耐食性が優れていても溶接
性を冷延鋼板並に高めることはできない。In addition, the above-mentioned Japanese Patent Publication No. 60-26835 5
All of the plated steel sheets disclosed in Publication No. 75879 contain zinc as an alloying element, and even if they have excellent corrosion resistance, they cannot have weldability as high as that of cold-rolled steel sheets.
溶接性については、亜鉛系合金では、亜鉛が低融点であ
ることに起因しているため本質的に解決は難しいからで
ある。This is because it is essentially difficult to solve the problem of weldability in zinc-based alloys due to the fact that zinc has a low melting point.
本発明は、これらの問題を解決して、自動車用めっき鋼
板で、特に要求されている優れた耐食性と冷延ｗ４ｖｉ
、並のスポット溶接性を兼備した鋼板を提供することを
目的とする。The present invention solves these problems and achieves excellent corrosion resistance and cold-rolled W4VI, which are particularly required in plated steel sheets for automobiles.
The purpose of the present invention is to provide a steel plate that has average spot weldability.
く課題を解決するための手段〉
本発明は、鉄を５〜３０重量％含み、残部がマンガンか
らなるマンガン−鉄合金めっきを、鋼板表面に５〜５０
ｇ／ｍ” ！したことを特徴とする塩害環境下で高耐食
性を存しかつスポット溶接性に優れたマンガン−鉄合金
電気めっき鋼板である。Means for Solving the Problems> The present invention applies a manganese-iron alloy plating containing 5 to 30% by weight of iron and the balance being manganese to the surface of a steel plate in an amount of 5 to 50% by weight.
This is a manganese-iron alloy electroplated steel sheet that exhibits high corrosion resistance in a salt-damaged environment and has excellent spot weldability.
く作 用〉
自動車用めっき鋼板におけるスポット溶接性とは、連続
打点性を意味し、その低下現象には、打点に伴って電極
先端部のめっき金属との合金化に始まり、合金層の成長
２合金層の剥Ｍ（ＩＲ耗）。Effect> The spot weldability of plated steel sheets for automobiles refers to continuous spot weldability, and its deterioration includes the process of alloying with the plated metal at the tip of the electrode as the spot welds, and the growth of the alloy layer. Peeling of alloy layer (IR wear).
電極先端径（ナゲツト径）の拡大、電流密度低下。Expansion of electrode tip diameter (nugget diameter) and reduction of current density.
ナゲツト形成不良の一連の過程からなり、したがって連
続打点性の低下は合金層の形成が重要部分を支配してい
る。This consists of a series of processes that result in poor nugget formation, and therefore the formation of an alloy layer plays an important role in the deterioration of continuous dotting performance.
亜鉛系めっき鋼板は、亜鉛の融点が４１９℃と低いため
、従来のニッケル含有率が１０〜１５％の亜鉛ニッケル
合金めっきや亜鉛−鉄合金めっきは、上記の連続打点性
の低下をもたらす合金層の形成を抑制することは困難で
ある。In zinc-based plated steel sheets, since the melting point of zinc is as low as 419°C, conventional zinc-nickel alloy plating or zinc-iron alloy plating with a nickel content of 10 to 15% has an alloy layer that causes the above-mentioned deterioration in continuous dotting performance. It is difficult to suppress the formation of
これに対して、マンガン−鉄合金めっきは、マンガンの
融点が１２４４℃と高く、かつ鉄の融点は１５３４°Ｃ
なので、合金層が形成されても連続打点性は低下しなく
、冷延鋼板並の連続打点性を得ることが可能である。On the other hand, in manganese-iron alloy plating, the melting point of manganese is as high as 1244°C, and the melting point of iron is 1534°C.
Therefore, even if the alloy layer is formed, the continuous dot performance does not deteriorate, and it is possible to obtain continuous dot performance comparable to that of a cold rolled steel sheet.
更に、マンガンは亜鉛よりも電気化学的に卑な金属であ
り、鉄に対する犠牲防食性は亜鉛よりも優れている。Furthermore, manganese is an electrochemically less noble metal than zinc, and its sacrificial corrosion protection against iron is superior to that of zinc.
ここで、マンガン単体めっきは過度に活性であり、鉄と
カップルした場合には、容易に溶出してしまい、防食持
続性が劣るため、マンガンに鉄を合金化することによっ
てマンガンの活量を小さくし、アノード溶解に対する熱
力学的駆動力を減少させることが必要である。Here, single manganese plating is excessively active, and when coupled with iron, it is easily leached out, resulting in poor corrosion protection, so by alloying manganese with iron, the activity of manganese is reduced. However, it is necessary to reduce the thermodynamic driving force for anodic melting.
次に、本発明のマンガン−鉄合金めっきのマンガン及び
鉄の含有率は、次の理由から定められた。Next, the contents of manganese and iron in the manganese-iron alloy plating of the present invention were determined for the following reasons.
すなわち、マンガン−鉄合金めっき皮膜中の鉄含有率が
０〜１００重量％の範囲において冷延鋼板と同等の連続
打点性を示すが、鉄含有率が５重量％未満および３０重
量％をこえる含有率では、良好な裸耐食性及び塗装後耐
食性が得られず、５〜３０重量％の範囲内において、現
在報告されている亜鉛系合金めっきより優れた耐食性を
示すため、本発明のマンガン−鉄合金めっきの含有率は
、鉄が５〜３０重量％、残部がマンガンと限定される。That is, when the iron content in the manganese-iron alloy plating film is in the range of 0 to 100% by weight, it exhibits continuous dot performance equivalent to that of a cold rolled steel sheet, but when the iron content is less than 5% by weight or more than 30% by weight. The manganese-iron alloy of the present invention does not provide good bare corrosion resistance or post-coating corrosion resistance when the coating is applied at 5% to 30% by weight, but exhibits better corrosion resistance than the currently reported zinc-based alloy plating within the range of 5 to 30% by weight. The content of the plating is limited to 5 to 30% by weight of iron, and the balance being manganese.
また、本発明におけるめっき目付！５〜５０ｇ／ｍ１は
、次の理由から定められた。すなわち、５ｇ／ｍ”未満
では、十分な耐食性が得られず、他方５０ｇ／ｍ”を越
えても、−段と優れた耐食性向上は得られず、また現在
の電気めっき技術では極めて生産性が悪（なるからであ
る。Also, the plating weight in the present invention! 5 to 50 g/m1 was determined for the following reason. In other words, if it is less than 5 g/m", sufficient corrosion resistance cannot be obtained, and even if it exceeds 50 g/m", a significant improvement in corrosion resistance cannot be obtained, and current electroplating technology is extremely difficult to produce. Evil (because it becomes).
本発明のマンガン−鉄合金めっき鋼板は、塩害環境下で
の耐食性および溶接性が他のめっき鋼板に比べて極めて
優れている他、自動車用鋼板として必要な加工性、化成
処理性および電着塗装性も冷延鋼板並の特性も備えてい
る。The manganese-iron alloy plated steel sheet of the present invention has extremely superior corrosion resistance and weldability in a salt-damaged environment compared to other plated steel sheets, as well as workability, chemical conversion treatment properties, and electrodeposition coating required for automotive steel sheets. It also has properties comparable to cold-rolled steel sheets.
〈実施例〉 次に、本発明を実施例によって更に詳述する。<Example> Next, the present invention will be explained in more detail by way of examples.
実施例１
０．８−板厚の自動車用冷延鋼板（Ｊ １５−５ＰＣＣ
’）に塩化マンガン、塩化第１鉄を基本成分とする浴中
で、鉄含有率が２〜１００重量％９日付量が２０ｇ／ｍ
”のマンガン−鉄合金電気めっきを鋼板に施し、定置式
スポット溶接Ｉ！ （３５ＫＶ＾）にて連続打点数を測
定した。また比較のために３０ｇ／ｍ”目付けの電気亜
鉛めっき鋼板、 Ｚｎ−Ｎｉめっき鋼板、Ｚｎ−Ｆｅめ
っき鋼板および冷延鋼板を調べた。得られた結果を第１
表に示す。Example 1 0.8-thick automotive cold-rolled steel plate (J 15-5PCC
') in a bath containing manganese chloride and ferrous chloride as basic components, with an iron content of 2 to 100% by weight9, an amount of 20g/m
A manganese-iron alloy electroplated steel plate with a weight of 30g/m was applied to a steel plate, and the number of continuous dots was measured using stationary spot welding I! (35KV^).For comparison, an electrogalvanized steel plate with a basis weight of 30g/m, A Ni-plated steel sheet, a Zn-Fe-plated steel sheet, and a cold-rolled steel sheet were investigated. The obtained results are the first
Shown in the table.
本発明鋼板は、いずれの鉄含有率でも、冷延鋼板と同等
の連続打点性を示し、また連続打点時の溶着、チリ発生
はほとんど認められず非常に優れたスポット溶接性を有
していた。The steel sheet of the present invention exhibited continuous weldability equivalent to that of a cold-rolled steel sheet at any iron content, and had very excellent spot weldability with almost no welding or dust generation observed during continuous dotting. .
実施例２ 実施例１と同様に、鉄含有率が２〜５０重量％。Example 2 As in Example 1, the iron content is 2 to 50% by weight.
目付量が２０ｇ／ｍ’のマンガン−鉄合金めっきを鋼板
に施し、塩水噴霧試験（ＪＩＳ−Ｚ２３７１）を行った
。A manganese-iron alloy plating having a basis weight of 20 g/m' was applied to a steel plate, and a salt spray test (JIS-Z2371) was conducted.
得られた結果を第２表に示す。The results obtained are shown in Table 2.
耐食性に及ぼす鉄含有率の影響は、鉄含有率が５重量％
未満および３０重量％を越えると耐食性は悪くなるが、
５〜３０重量％の範囲では良好な耐食性を示した。The influence of iron content on corrosion resistance is as follows: iron content is 5% by weight
If it is less than 30% by weight or more than 30% by weight, corrosion resistance will deteriorate;
Good corrosion resistance was exhibited in the range of 5 to 30% by weight.
実施例３
実施例１と同様に、鉄含有率が１５重量％で、目付量が
２〜５０ｇ／ｍ”のマンガン−鉄合金めっきを綱板に施
し、塩水噴霧試験（ＪＩＳ−Ｚ２３７１）を行った。得
られた結果を第３表に示す。Example 3 Similarly to Example 1, a manganese-iron alloy plating with an iron content of 15% by weight and a basis weight of 2 to 50 g/m was applied to a steel plate, and a salt spray test (JIS-Z2371) was conducted. The results obtained are shown in Table 3.
目付量が５ ｇ／ｍ”未満では効果が少ないが、それ以
上であれば目付量が多いほど赤錆発生は少な（なった。If the basis weight is less than 5 g/m'', the effect will be small, but if it is higher than that, the occurrence of red rust will be less.
実施例４ 実施例１と同様に、鉄含有率が２〜５０重量％。Example 4 As in Example 1, the iron content is 2 to 50% by weight.
目付量が２０ｇ／ｍ”のマンガン−鉄合金めっきを鋼板
に施し、次いで、化成処理（日本バー力ライジング社製
）、カチオン電着塗装（日本ペイント製、２０μｍ）中
塗り、上塗り塗装（関西ペイント製各３５μ端）を行い
、ナイフにて塗装に地鉄に達する傷を付けて、塗装後耐
食性を調べた。腐食試験は塩水噴霧試験（ＪＩＳ−Ｚ２
３７１） ３５℃、３０分−乾燥６０’Ｃ１２，５時間
→湿潤４０℃、９５％Ｒ１１，２，５時間−乾燥６０°
Ｃ１２，５時間の複合サイクル試験を１５０日間行った
。得られた結果を第４表に示す。Manganese-iron alloy plating with a basis weight of 20 g/m'' is applied to the steel plate, followed by chemical conversion treatment (manufactured by Nippon Bariki Rising Co., Ltd.), cationic electrodeposition coating (manufactured by Nippon Paint, 20 μm), intermediate coating, and top coating (Kansai Paint). The corrosion resistance was examined after coating by scratching the coating with a knife to reach the base metal.The corrosion test was conducted using a salt spray test (JIS-Z2
371) 35°C, 30 minutes - drying 60'C12,5 hours → wet 40°C, 95% R11,2,5 hours - drying 60°
A C12,5 hour combined cycle test was conducted for 150 days. The results obtained are shown in Table 4.
鉄含有率が５重量％未満および３０重量％を越えると耐
食性は悪くなるが、５〜３０重量％の範囲では優れた耐
食性を示した。When the iron content was less than 5% by weight and more than 30% by weight, the corrosion resistance deteriorated, but in the range of 5 to 30% by weight, excellent corrosion resistance was exhibited.
実施例５
実施例４と同様に、鉄含有率が１５重量％、目付量が２
〜５０ｇ／ｍ！で複合サイクル試験を行った。Example 5 Similar to Example 4, the iron content was 15% by weight and the basis weight was 2.
~50g/m! A combined cycle test was conducted.
得られた結果を第５表に示す。The results obtained are shown in Table 5.
５ｇ／ｍ”以上の目付量で優れた耐食性を示した。Excellent corrosion resistance was exhibited at a basis weight of 5 g/m'' or more.
第１表
第
表
第
表
評価基準
第２表と同じ
〈発明の効果〉
以上説明したように、本発明は、高度に自動化された自
動車メーカにおけるスポット溶接において冷延鋼板並の
連続打点性を有し、かつ塩害環境下での耐食性が従来の
めっき綱板より優れためっき鋼板であって、現在社会的
に強く要求されている高耐食性のめっき鋼板を使用した
自動車を生産性を低下させることなく製造でき、撓めて
優れた効果を奏する。Same as Table 1 Evaluation Criteria Table 2 <Effects of the Invention> As explained above, the present invention has continuous dotting performance comparable to that of cold-rolled steel sheets in spot welding in highly automated automobile manufacturers. Moreover, it is a plated steel sheet that has better corrosion resistance in salt-damaged environments than conventional plated steel sheets, and it is possible to manufacture automobiles using plated steel sheets with high corrosion resistance, which is currently strongly demanded by society, without reducing productivity. It can be manufactured and bends to produce excellent effects.
Claims (1)
ガン−鉄合金めっきを、鋼板表面に５〜５０ｇ／ｍ＾２
施したことを特徴とする塩害環境下で高耐食性を有しか
つスポット溶接性に優れたマンガン−鉄合金電気めっき
鋼板。A manganese-iron alloy plating containing 5 to 30% by weight of iron and the remainder being manganese is applied to the surface of the steel plate at a rate of 5 to 50 g/m^2.
A manganese-iron alloy electroplated steel sheet that has high corrosion resistance in a salt-damaged environment and has excellent spot weldability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63313018A JPH02159394A (en) | 1988-12-13 | 1988-12-13 | Manganese-iron alloy electroplated steel sheet having high corrosion resistance in environment causing salt damage and also having superior spot weldability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63313018A JPH02159394A (en) | 1988-12-13 | 1988-12-13 | Manganese-iron alloy electroplated steel sheet having high corrosion resistance in environment causing salt damage and also having superior spot weldability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02159394A true JPH02159394A (en) | 1990-06-19 |
Family
ID=18036235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63313018A Pending JPH02159394A (en) | 1988-12-13 | 1988-12-13 | Manganese-iron alloy electroplated steel sheet having high corrosion resistance in environment causing salt damage and also having superior spot weldability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02159394A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054659C (en) * | 1997-07-09 | 2000-07-19 | 王振田 | Electrolyte for Etching-less low temp electroplating manganeisen |
| JP2009203497A (en) * | 2008-02-26 | 2009-09-10 | Nippon Steel Corp | Highly corrosion resistant plated steel and method of manufacturing the same |
-
1988
- 1988-12-13 JP JP63313018A patent/JPH02159394A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054659C (en) * | 1997-07-09 | 2000-07-19 | 王振田 | Electrolyte for Etching-less low temp electroplating manganeisen |
| JP2009203497A (en) * | 2008-02-26 | 2009-09-10 | Nippon Steel Corp | Highly corrosion resistant plated steel and method of manufacturing the same |
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