CN104962913A - Outer covering protection layer structure of car decorating part - Google Patents
Outer covering protection layer structure of car decorating part Download PDFInfo
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- CN104962913A CN104962913A CN201510318847.9A CN201510318847A CN104962913A CN 104962913 A CN104962913 A CN 104962913A CN 201510318847 A CN201510318847 A CN 201510318847A CN 104962913 A CN104962913 A CN 104962913A
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- nickel dam
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Abstract
The invention belongs to the technical field of car accessories, and provides an outer covering protection layer structure of a car decorating part. The outer covering protection layer structure of the car decorating part sequentially comprises a first layer, a second layer, a third layer, a fourth layer and a fifth layer from inside to outside, wherein the first layer is a semi-bright nickel layer; the second layer is a full-bright nickel layer; the third layer is a microcrack nickel layer; the fourth layer is a micropore nickel layer; the fifth layer is a decorative layer; the microcrack nickel layer and the micropore nickel layer are compounded together to form an anti-corrosion protection layer; the potential difference of the micropore nickel layer and the microcrack nickel layer ranges from 10 mv to 120 mv. The outer covering protection layer structure of the car decorating part has the advantages that the microcrack nickel layer and the micropore nickel layer are compounded together to form the anti-corrosion protection layer, so that the appearance brightness feature of the micropore nickel layer is ensured; due to the double anti-corrosion property of the micropore nickel and the microcrack nickel, products can achieve the ultra-high anti-corrosion performance.
Description
Technical field
The invention belongs to technical field of automobile, relate to a kind of outer covering protection Rotating fields of automobile decoration of improving product erosion resistance.
Background technology
Protective layer outside existing car trim has half light nickel dam+light nickel dam+flawless layers of chrome, or half light nickel+light nickel+microporous nickel+flawless layers of chrome, or half light nickel dam+light nickel dam+tiny crack nickel dam+flawless layers of chrome, but the stress of self is large, industrially be difficult to obtain a kind ofly there is no the chromium electro-cladding of crackle or hole (comprising sexavalent chrome and trivalent chromium coating) completely, expose after aerial chromium electro-cladding is passivated, its current potential than nickel just, when running into the corrosive medium in air, just corrosion cell is formed with nickel dam, cause ornamental chromium electro-cladding in extreme environment, occur a large amount of irregular corrosion, even chromium electro-cladding dissolves completely, in order to improve the antiseptic power of coating further, tiny crack nickel dam is applied on light nickel coating, micro-crack nickel plates the heavily stressed special nickel dam of one deck on light nickel dam, a large amount of tiny cracks will be produced due to stress when chromium plating, owing to being used alone tiny crack nickel dam, product surface can send out mist, luminance brightness is poor, limited to the raising of erosion resistance.
Summary of the invention
Technical problem to be solved by this invention is the present situation for prior art; and covering protection Rotating fields outside a kind of car trim is provided; both ensure that the shiny appearance characteristic of micropore nickel dam, there is again the dual solidity to corrosion of microporous nickel and micro-crack nickel, product can be made to reach superelevation solidity to corrosion.
The present invention solves the problems of the technologies described above adopted technical scheme: the outer covering protection Rotating fields of a kind of car trim, it is characterized in that, comprise the first layer successively from inside to outside, the second layer, third layer, 4th layer and layer 5, described the first layer is half light nickel dam, the second layer is full light nickel dam, third layer is tiny crack nickel dam, 4th layer is micropore nickel dam, described layer 5 is ornament layer, described tiny crack nickel dam and the two-layer corrosion-resistant protective layer of composition that is combined with each other of micropore nickel dam, described micropore nickel dam and the potential difference scope of tiny crack nickel dam are 10-120mv.
The measure taked for optimizing such scheme specifically comprises:
In the outer covering protection Rotating fields of above-mentioned a kind of car trim, also have tiny crack nickel dam between described micropore nickel dam and ornament layer, described tiny crack nickel dam, micropore nickel dam and tiny crack nickel dam three layers of compound form corrosion-resistant protective layer.
In the outer covering protection Rotating fields of above-mentioned a kind of car trim, described ornament layer is layers of chrome, and layers of chrome is trivalent chromium layer or sexavalence layers of chrome.
In the outer covering protection Rotating fields of above-mentioned a kind of car trim, half described light nickel dam, full light nickel dam, tiny crack nickel dam, micropore nickel dam successively galvanic deposit form, and described ornament layer finally deposits.
In the outer covering protection Rotating fields of above-mentioned a kind of car trim, half described light nickel dam is the nickel dam plating one deck half light at product surface, and half light nickel coating is columnar structure.
In the outer covering protection Rotating fields of above-mentioned a kind of car trim, described full light nickel dam is the nickel dam plating one deck entire bright at product surface, and full light nickel dam is laminate structure.
In the outer covering protection Rotating fields of above-mentioned a kind of car trim, described tiny crack nickel dam is plate the nickel dam of one deck uniformly also containing numerous crackle at product surface.
In the outer covering protection Rotating fields of above-mentioned a kind of car trim, described micropore nickel dam is plate the nickel dam of one deck uniformly and containing numerous non-conductive particle and conductive particle at product surface.
Compared with prior art; the invention has the advantages that and adopt tiny crack nickel dam and the two-layer compound of micropore nickel dam to form corrosion-resistant protective layer; or adopt tiny crack nickel dam, micropore nickel dam and tiny crack nickel dam three layers of compound to form corrosion-resistant protective layer; both ensure that the shiny appearance characteristic of micropore nickel dam; there is again the dual solidity to corrosion of microporous nickel and micro-crack nickel, product can be made to reach superelevation solidity to corrosion.
Accompanying drawing explanation
Fig. 1 is the outer protective cover wherein a kind of mode structural representation of car trim;
Fig. 2 is the another kind of mode structural representation of the outer protective cover of car trim.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
In figure, half light nickel dam 1; Full light nickel dam 2; Tiny crack nickel dam 3; Micropore nickel dam 4; Ornament layer 5; Decoration 6.
As shown in Figure 1, here the outer covering protection Rotating fields of this car trim is formed on decoration 6, mainly contain two kinds of modes, the first comprises the first layer from inside to outside successively, the second layer, third layer, 4th layer and layer 5, the first layer is half light nickel dam 1, the second layer is full light nickel dam 2, third layer is tiny crack nickel dam 3, 4th layer is micropore nickel dam 4, layer 5 is ornament layer 5, here tiny crack nickel dam 3 and the two-layer corrosion-resistant protective layer of composition that is combined with each other of micropore nickel dam 4, described micropore nickel dam 4 is 10-120mv with the potential difference scope of tiny crack nickel dam 3, like this can the sacrifice priority of control nickel dam, as shown in Figure 2, another kind of mode also has tiny crack nickel dam 3 between micropore nickel dam 4 and ornament layer 5, tiny crack nickel dam 3, micropore nickel dam 4 and tiny crack nickel dam 3 three layers of compound form corrosion-resistant protective layer, here poor with ornament layer 5 associativity relative to the first micropore nickel dam 4, here one deck tiny crack nickel dam 3 is increased again, not only ensure that good associativity, two tiny crack nickel dam 3 and micropore nickel dam 4 combine and further enhancing corrosion resistance nature simultaneously, ornament layer 5 is layers of chrome, layers of chrome is trivalent chromium layer or sexavalence layers of chrome, half light nickel dam 1, full light nickel dam 2, tiny crack nickel dam 3, micropore nickel dam 4 successively galvanic deposit forms, ornament layer 5 finally deposits, or half light nickel dam 1, full light nickel dam 2, tiny crack nickel dam 3, micropore nickel dam 4, tiny crack nickel dam 3 successively galvanic deposit form, ornament layer 5 finally deposits, half light nickel dam 1 is the nickel dam plating one deck half light at product surface, half light nickel coating is columnar structure, full light nickel dam 2 is the nickel dam plating one deck entire bright at product surface, full light nickel dam 2 is in laminate structure, tiny crack nickel dam 3 is plate one deck uniformly and containing the nickel dam of numerous crackle at product surface, and micropore nickel dam 4 be plate one deck uniformly and contain the nickel dam of numerous non-conductive particle and conductive particle at product surface
Here this car trim outer covering protection Rotating fields takes following operation to obtain, and step one, carries out pretreatment process in early stage to substrate surface; Step 2, the base material after above-mentioned surface treatment is carried out chemical sinking nickel operation; Step 3, after chemical sinking nickel operation, carry out plating bottoming nickel operation; Step 4, the base material after the process of above-mentioned plating bottoming nickel operation is carried out acid coppering operation; Step 5, then carry out plating half light nickel successively, plate full light nickel, plating micro-crack nickel, plating microporous nickel, plating micro-crack nickel operation, make substrate surface from inside to outside successively galvanic deposit form half light nickel dam 1, full light nickel dam 2, tiny crack nickel dam 3, micropore nickel dam 4, tiny crack nickel dam 3; Step 6, finally carry out plating ornament layer 5 operation, make to form ornament layer 5 at the outermost layer of substrate surface.
Composition is comprised and concentration is: aqueous sulfuric acid nickel 200-300g/L at the plating solution of plating half light nickel operation, moisture nickelous chloride 35-50g/L, boric acid 35-50g/L, the elementary brightening agent 3.0-7.0ml/L of semi-bright nickel, semi-bright nickel second-class brightener 0.3-1.0ml/L, potential difference adjusting agent 0.8-1.2ml/L, wetting agent 2.0-3.0ml/L; The plating solution plating full light nickel operation comprises composition and concentration is: aqueous sulfuric acid nickel 220-340g/L, moisture nickelous chloride 40-50g/L, boric acid 35-40g/L, bright nickel softening agent 8-12ml/L, bright nickel key light agent 0.5-0.9ml/L, wetting agent 2.0-3.0ml/L; The plating solution of plating micro-crack nickel operation comprises composition and concentration is: moisture nickelous chloride: 180 ~ 260g/L, acetic acid: 20 ~ 60ml/L, SN-1A:40 ~ 60g/L, SN-2A:1 ~ 5ml/L, wetting agent: 1 ~ 5ml/L; Plating microporous nickel operation plating solution comprises composition and concentration is: aqueous sulfuric acid nickel 300-350g/L, moisture nickelous chloride 50-60g/L, boric acid 40-50g/L, nickel envelope brightening agent 6-12ml/L, nickel envelope key light agent 4-7.5ml/L, nickel envelope particulate vector 10-15g/L; Nickel envelope particle comprises conduction and non-conductive particle, nickel envelope conductive particle 0.3-0.5ml/L, and nickel seals non-conductive particle 3.0-5.0ml/L; The plating solution of plating sexavalence layers of chrome operation comprises composition and concentration is: chromic anhydride 260-360g/L, decorative chromium brightening agent 1.0-4.0g/L, chromium fog inhibitor 0.1-0.4ml/L, and all the other are aqueous solvent; Or comprise composition and concentration is at the plating solution of plating trivalent chromium layer operation: open cylinder salt 260-360g/L, chromic salt 10-30g/L, stablizer 50-120ml/L, complexing agent 0.5-3.0ml/L, wetting agent 0.5-4.0ml/L, all the other are aqueous solvent.
Pretreatment process in early stage before carrying out protective layer plating structure in step one includes surperficial grease treatment process, surface coarsening treatment process, surperficial neutralizing treatment operation, surface activation process operation and surperficial dispergation treatment process successively; Be specially and base material blank is cleaned degrease in sodium hydroxide, sodium carbonate and water glass mixing solutions, immerse after degrease in chromic trioxide and sulfuric acid mixture liquid and carry out surface coarsening process, then put into hydrochloric acid soln and carry out surface neutralization, adopt colloidal palladium solution to carry out surface activation process after neutralization, then in sulphuric acid soln, carry out surperficial dispergation process; The mixing solutions walking surperficial grease treatment process comprises composition and concentration is: the concentration of sodium hydroxide is 15-50g/L, and the concentration of sodium carbonate is 10-45g/L, and the concentration of water glass is 40-100g/L; Here surperficial degrease step can remove greasy dirt and other impurity of plastic surface, impels surface coarsening even, improves binding force of cladding material; The mixed solution of surface coarsening treatment process comprises composition and concentration is: the concentration of chromic trioxide is 350-450g/L, and the concentration of sulfuric acid is 350-450g/L; Further preferably, the concentration of chromic trioxide is 150-280g/L, and the concentration of sulfuric acid is 200-290g/L.Here chromic trioxide is the main salt in plating solution, chromium metal and production chromium sesquioxide hydrate etc. is deposited at plastic surface by the mechanism of oxidation-reduction reaction and electron exchange, coating is turned black, the covering power of chromic trioxide to plating solution has considerable influence, if chromic trioxide content is high, then covering power is strong, crystallization is careful, if but chromic trioxide too high levels, the hardness of coating then can be made to decline, in addition, chromic trioxide and sulfuric acid can at corrosion plastic surface to form micro-roughened surface at plastic surface as etching reagent, " snap close effect " required during to guarantee electroless plating, the bonding force of plastic surface and coating is improved with this.But sulfate radical can reduce the color characteristics of coating, coating is turned to be yellow, in order to can reach corrosion plastic surface and reduce harmful effect simultaneously, need the content of accurately configuration sulfuric acid; The concentration of hydrochloric acid solution of surface neutralizing treatment operation is 20-100g/L; The colloidal palladium solution of surface activation process comprises composition and concentration is: the concentration of Palladous chloride is the concentration 2.5-7g/L of 2.0-3.5g/L, tin protochloride; Further preferably, the concentration of Palladous chloride is 2.5-2.9g/L, and the concentration of tin protochloride is 3.3-5.5g/L.Here in colloidal palladium solution, Palladous chloride is covered in plastic surface, for follow-up chemical nickel provides catalytic center, the tin ion of tin protochloride then can be deposited on around palladium ion with chemical combination group too, avoid palladium ion be oxidized in water or in air and come off, the life cycle of colloidal palladium solution can be increased; The sulphuric acid soln concentration of surface dispergation treatment process is 40-120g/L; Surface dispergation process refers to and utilizes sulfuric acid to remove in colloidal palladium solution the tin protochloride be coated on around palladous oxide, is come out by palladium metal particle, makes subsequent chemistry sink nickel technique more smooth and easy; Chemical sinking nickel operation mixing solutions comprises composition and concentration is: the concentration of single nickel salt is 15-40g/L, and the concentration of inferior sodium phosphate is 35-60g/L, and the concentration of Trisodium Citrate is 20-45g/L; Further preferably, the concentration of single nickel salt is 22-36g/L, and the concentration of inferior sodium phosphate is 42-53g/L, and the concentration of Trisodium Citrate is 25-30g/L; Here chemical sinking nickel refers to and deposit the thin conductive layer of one deck in the palladium metal that plastic surface has catalytic activity, and be convenient to the various metal of follow-up plating, in chemical sinking nickel process, single nickel salt provides nickel element; Inferior sodium phosphate is strong reductant, and the nickel element in single nickel salt is reduced into metallic nickel by it; Trisodium Citrate is buffer reagent, it makes the reaction of inferior sodium phosphate reduced nickel element more mild, in the present invention, adopt Trisodium Citrate as buffer reagent, instead of existing boric acid, because the boron of boric acid is heavy metal element, causes the waste water meeting serious environment pollution electroplating rear generation, have a strong impact on the eubiosis and human health.And Trisodium Citrate is more friendly and cost is lower to environment, and by test of the present invention, the buffering energy of Trisodium Citrate is also better than boric acid, and this mainly because there is citric acid freely in Trisodium Citrate, can provide hydrogen ion and hydroxide ion; The mixing solutions of the plating bottoming nickel operation in step 3 comprises composition and concentration is: the concentration of aqueous sulfuric acid nickel is 160-340g/L, and the concentration of moisture nickelous chloride is 30-60g/L, and the concentration of boric acid is 30-65g/L; Further preferably, the concentration of aqueous sulfuric acid nickel is 220-280g/L, and the concentration of moisture nickelous chloride is 40-555g/L, and the concentration of boric acid is 40-55g/L.
In the mixing solutions of acid coppering operation, each component and concentration are: the concentration of copper sulfate is 160-260g/L, and the concentration of sulfuric acid is 45-80g/L; Further preferably, the concentration of copper sulfate is 190-230g/L, and the concentration of sulfuric acid is 65-80g/L; Here the object of acid coppering utilizes the characteristic of copper sulfate to improve luminance brightness and the planarization of plastic surface, and can also improve the toughness of coating entirety.This is because copper coating compares nickel coating and other metal plating, its ductility is better, and after therefore plating sour layers of copper, toughness and the Surface flat of overall coating are improved.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from the scope that spirit of the present invention defines.
Claims (8)
1. the outer covering protection Rotating fields of car trim; it is characterized in that; comprise the first layer, the second layer, third layer, the 4th layer and layer 5 from inside to outside successively; described the first layer is half light nickel dam; the second layer is full light nickel dam; third layer is tiny crack nickel dam; 4th layer is micropore nickel dam; described layer 5 is ornament layer; described tiny crack nickel dam and the two-layer corrosion-resistant protective layer of composition that is combined with each other of micropore nickel dam, described micropore nickel dam and the potential difference scope of tiny crack nickel dam are 10-120mv.
2. the outer covering protection Rotating fields of a kind of car trim according to claim 1; it is characterized in that; also have tiny crack nickel dam between described micropore nickel dam and ornament layer, described tiny crack nickel dam, micropore nickel dam and tiny crack nickel dam three layers of compound form corrosion-resistant protective layer.
3. the outer covering protection Rotating fields of a kind of car trim according to claim 1 and 2, it is characterized in that, described ornament layer is layers of chrome, and layers of chrome is trivalent chromium layer or sexavalence layers of chrome.
4. the outer covering protection Rotating fields of a kind of car trim according to claim 1 and 2, is characterized in that, half described light nickel dam, full light nickel dam, tiny crack nickel dam, micropore nickel dam successively galvanic deposit form, and described ornament layer finally deposits.
5. the outer covering protection Rotating fields of a kind of car trim according to claim 1 and 2, is characterized in that, half described light nickel dam is the nickel dam plating one deck half light at product surface, and half light nickel coating is columnar structure.
6. the outer covering protection Rotating fields of a kind of car trim according to claim 1 and 2, it is characterized in that, described full light nickel dam is the nickel dam plating one deck entire bright at product surface, and full light nickel dam is laminate structure.
7. the outer covering protection Rotating fields of a kind of car trim according to claim 1 and 2, is characterized in that, described tiny crack nickel dam is plate the nickel dam of one deck uniformly also containing numerous crackle at product surface.
8. the outer covering protection Rotating fields of a kind of car trim according to claim 1 and 2, is characterized in that, described micropore nickel dam is plate the nickel dam of one deck uniformly and containing numerous non-conductive particle and conductive particle at product surface.
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| CN201510318847.9A CN104962913A (en) | 2015-06-11 | 2015-06-11 | Outer covering protection layer structure of car decorating part |
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| CN201510318847.9A CN104962913A (en) | 2015-06-11 | 2015-06-11 | Outer covering protection layer structure of car decorating part |
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2015
- 2015-06-11 CN CN201510318847.9A patent/CN104962913A/en active Pending
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| US20140284218A1 (en) * | 2007-08-30 | 2014-09-25 | Nissan Motor Co., Ltd. | Chrome-plated part and manufacturing method of the same |
| CN102317504A (en) * | 2009-02-13 | 2012-01-11 | 日产自动车株式会社 | Chrome-plated part and manufacturing method of the same |
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Application publication date: 20151007 |