CN1986881A - Chemical nickel plating process on magnesium alloy - Google Patents
Chemical nickel plating process on magnesium alloy Download PDFInfo
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- CN1986881A CN1986881A CN 200510120985 CN200510120985A CN1986881A CN 1986881 A CN1986881 A CN 1986881A CN 200510120985 CN200510120985 CN 200510120985 CN 200510120985 A CN200510120985 A CN 200510120985A CN 1986881 A CN1986881 A CN 1986881A
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Abstract
The chemical nickel plating process on magnesium alloy features that one layer of conducting paint is sprayed onto the surface of the magnesium alloy before chemical nickel plating. The chemical nickel plating process includes: treating the surface to be plated with acid solution to activate, spraying one layer of conducting paint, plating one copper base layer, activating with palladium solution, and final plating nickel layer chemically. The process with sprayed conducting paint to replace traditional chromium passivation has simple operation, technological stability, less environmental pollution and less influence on operator's health. The chemical nickel coating thus prepared has high impact strength, homogeneous compact film layer, high corrosion resistance and excellent metal appearance.
Description
Technical field
The present invention relates to the treatment technology of metallic surface, be specifically related to a kind of method of carrying out chemical nickel plating at Mg alloy surface.
Background technology
Magnesium alloy has very high specific tenacity, specific rigidity, than Young's modulus and good heat-conductivity conducting, have good damping shock absorption and electro-magnetic screen function simultaneously, be widely used in automobile making, aerospace, telecommunications field etc., be described as " the green engineering material of 21st century ".Yet because the chemically reactive of magnesium alloy itself is higher, in air, be easy to oxidation, very easily under various envrionment conditionss, corrode, thereby hindered the widespread use of magnesium alloy.
Mg alloy surface is carried out chemical modification, and particularly chemical plating layer of metal nickel on Mg alloy surface is one of effective way that improves the corrosion resistance of magnesium alloy energy.Traditional method of nickel plating on Mg alloy surface mainly contains soaks zinc and two kinds of methods of direct chemical plating.Soak the zinc method and be in containing the zinc solution of pyrophosphate salt, soak zinc after, by the cyanide copper plating bottoming, carry out chemical plating then.The difficult control of this method complex process, and cost height are not suitable for the higher magnesium alloy of aluminium content.The technology of direct chemical nickel plating method is to carry out alkaline degreasing earlier, unplated piece is carried out chromic acid dipping and hydrofluoric acid activation treatment again, at last chemical plating again.Chromic acid that this method is used in the pre-treatment process and hydrofluoric acid all bring great harm to HUMAN HEALTH and environment protection.Therefore by improving the pre-treating technology of direct chemical nickel plating, the Electroless Nickel Plating of Aluminum Alloy method of developing a kind of environment-friendly type has a very high using value industrial.
Summary of the invention
The object of the present invention is to provide and a kind ofly carry out chemical nickel plating at Mg alloy surface, and then magnesium alloy carried out the method for corrosion-resistance treatment, solve complex process that prior art carries out existing in the chemical nickel plating to magnesium alloy, be detrimental to health and cause problems such as environmental pollution.
The method of a kind of chemically coating nickel by magnesium-alloy provided by the invention is characterized in that, and is first at magnesium alloy surface spraying one deck electric conduction paint, and then member is carried out chemical nickel plating.
The method of a kind of chemically coating nickel by magnesium-alloy provided by the invention is characterized in that, comprises following operation steps:
1) arrangement and activation: with the magnesium alloy member surface polish, polishing, degreasing, at room temperature adopt the acidic solution activation then, 0.1～1 minute time; With after washing and oven dry;
2) spraying electric conduction paint: will put the magnesium alloy member after activating in order, at its surface spraying one deck electric conduction paint;
3) toasted 50～200 minutes down at 50～90 ℃ then;
4) electroless copper: the magnesium alloy member immersion is contained in the chemical copper plating solution of mantoquita, reductive agent, complexing agent and stablizer, and controlled temperature is 40～50 ℃, and the pH value is 12.0～13.0, and soak time is 20～60 minutes;
5) water flushing and rinsed with deionized water;
6) palladium liquid activation: after water flushing of the difference of the magnesium alloy member after the copper facing and rinsed with deionized water, activate 0.3～5 minute in the immersion palladium liquid.
7) chemical nickel plating.
Employed electric conduction paint is that conductive oil, HM-008A special diluting agent, the HM-008B solidifying agent of HM-008A forms by 6: 1: 3.5～4.0 mass ratio is mixed for the model of being produced by XXX company among the present invention.
Described arrangement and activation are that concentration is 85% phosphoric acid with acidic solution.
Described chemical copper plating solution contains the copper sulfate of concentration 8～18g/l, the formaldehyde of concentration 4～18g/l, the EDTA disodium salt of concentration 10～30g/l and the sodium tartrate of concentration 6～20g/l, and the yellow prussiate of potash of the pyridine of concentration 2～10mg/l and concentration 2～10mg/l.
Described palladium liquid is the palladium chloride solution of pH value 1.5～3.0, concentration 0.02～0.2g/l.
The process of described chemical nickel plating is, to immerse through the magnesium alloy member after the activation of palladium liquid and contain in the chemical nickel-plating solution of nickel salt, reductive agent, complexing agent, buffered soln and stablizer, controlled temperature is at 40～50 ℃, pH value 8.6～9.5, soaked 3～10 minutes, washing was then toasted 20～60 minutes down at 50～80 ℃ again.
Described chemical nickel-plating solution contains the single nickel salt of concentration 20～30g/l, the inferior sodium phosphate of concentration 20～30g/l, the Trisodium Citrate of concentration 15～25g/l, the ammonium chloride solution of concentration 10～20g/l, and the sulphur of concentration 1～2mg/l urine.
The present invention has following advantage:
1. adopted the mode of spraying electric conduction paint in the pretreatment technology of the present invention before chemical nickel plating, easy to control, process stabilizing.
2. adopt treatment process of the present invention, need be through dipping of the chromic acid in the traditional electrical electroplating method and hydrofluoric acid activation treatment, reduced the pollution of environment and reduced healthy effect operator.
3. adopt treatment process of the present invention, handle, simplified the technology of traditional chemically coating nickel by magnesium-alloy, reduced cost without soaking zinc.
4. the chemical Ni-plating layer that adopts the present invention to make, the even film layer densification, anti-impact force is strong, and erosion resistance is good, has the good metal outward appearance.
Below in conjunction with specific embodiment in detail the present invention is described in detail.
Embodiment
Magnesium alloy member to be plated is handled by following operation steps:
1. mechanical grinding: magnesium alloy member is ground with sandblast or sand paper, and the impurity of removing surperficial burr and adhering to carries out mechanical polishing then;
2. acid etch: at room temperature with 85% phosphoric acid solution to unplated piece soak, pickling, approximately continue 0.1 to 1 minute, with further remove the surface remaining adhere to dirt;
3. washing and oven dry;
4. spray electric conduction paint: conductive oil, HM-008A special diluting agent and HM-008B solidifying agent that to adopt commercially available model of being produced by XXX company be HM-008A form electric conduction paint according to 6: 1: 3.5～4.0 mass ratio is mixed, equably this electric conduction paint are sprayed to the surface of unplated piece;
5. baking: under 50～90 ℃, unplated piece was toasted 50～200 minutes;
6. electroless copper: will toast the magnesium alloy member to be plated that is coated with electric conduction paint after the mummification, immersion is to carry out copper plating treatment in the chemical copper plating solution formed of the yellow prussiate of potash of the pyridine of sodium tartrate, 2～10mg/l of EDTA disodium salt, the 6～20g/l of formaldehyde, the 10～30g/l of copper sulfate, the 4～18g/l of 8～18g/l and 2～10mg/l by concentration, control condition is 40～50 ℃ of temperature, pH value 12.0～13.0, soak time 20～60 minutes;
7. carry out the water flushing after the copper facing and use rinsed with deionized water;
8. palladium liquid activation: is that 0.02～0.2g/l, pH value are 1.5～3.0 PdCl with magnesium alloy member in concentration
2Carry out activation treatment in the solution, 0.3～5 minute time length;
9. carry out the water flushing after the activation and use rinsed with deionized water;
Chemical nickel plating: will be that pH value that the sulphur urine of the ammonium chloride solution of Trisodium Citrate, 10～20g/l of 40～50 ℃ of inferior sodium phosphate that immerse by concentration down the single nickel salt, the 20～30g/l that are 20～30g/l, 15～25g/l and 1～2mg/l is formed is in 8.6～9.5 the chemical nickel-plating solution in temperature through pretreated magnesium alloy member, handle 3～10 minutes;
10. plating piece washing back was toasted 20～60 minutes down at 50～80 ℃.
Adopt its nickel layer of magnesium alloy nickel plating part that above-mentioned technology obtains after tested, performance is shown in subordinate list:
Subordinate list: the chemical Ni-plating layer performance that adopts the inventive method to obtain
| Test event | Testing method | Test result |
| Thickness of coating | With precision is the quality of sample before and after nickel plating that 0.001 analytical balance that restrains is measured equivalent regular shape, and calculates difference; The measure sample surface-area; Density according to nickel calculates nickel layer thickness. | 3～5 microns of bed thickness |
| Sticking power | Plating piece was toasted 4 hours down at 90 degrees centigrade | No bubble, no wrinkling |
| Temperature shock | Plating piece was warming up to 70 ± 2 ℃ in 1 hour, humidity 85% kept 2 hours; In 1 hour, be cooled to-20 ± 2 ℃ again, kept 2 hours; Be warming up to 70 ± 2 ℃ again in 1 hour, humidity 95% kept 2 hours; Operation is carried out successively repeatedly, continues 48 hours. | Do not have peel off, flawless, no wrinkling, do not have and bubble |
| Salt fog | Salts solution 50 ± 1g/l, 35 ℃ keep the pH value down between 6.5～7.2, rate of salt spray precipitation, 1.0～2.0ml/h (80cm 2Horizontal collecting region in); Temperature in the salt-spray cabinet efficiency test space is 35 ± 2 ℃; Duration of test continues spraying.After test finishes plating piece is washed with the tap water below 38 ℃, dry to be measured. | Macroscopic spot corrosion and pit are peeled off, do not had to no aliquation, nothing |
Claims (9)
1. the method for a chemically coating nickel by magnesium-alloy is characterized in that, before magnesium alloy member is carried out chemical nickel plating, at magnesium alloy surface spraying one deck electric conduction paint.
2. the method for a chemically coating nickel by magnesium-alloy is characterized in that, as follows operation:
1) arrangement and activation: with the magnesium alloy member surface polish, polishing, degreasing, at room temperature adopt the acidic solution activation then, 0.1～1 minute time;
2) spraying electric conduction paint: the magnesium alloy member that will put in order after activating is washed oven dry, at its surface spraying one deck electric conduction paint, toasts 50～200 minutes under 50～90 ℃ then;
3) electroless copper: the magnesium alloy member after will drying immerses and contains in the chemical copper plating solution of mantoquita, reductive agent, complexing agent and stablizer, and controlled temperature is 40～50 ℃, and the pH value is 12.0～13.0, and soak time is 20～60 minutes; Water washes and rinsed with deionized water respectively subsequently;
4) palladium liquid activation: after water flushing of the difference of the magnesium alloy member after the copper facing and rinsed with deionized water, activate 0.3～5 minute in the immersion palladium liquid.
5) chemical nickel plating.
3. according to the method for claim 1 or 2 described chemically coating nickel by magnesium-alloy, it is characterized in that it is 6: 1: 3.5～4.0 conductive oil, thinner and solidifying agent that described electric conduction paint contains mass ratio.
4. according to the method for the described chemically coating nickel by magnesium-alloy of claim 3, it is characterized in that the conductive oil that is contained in the described electric conduction paint, thinner, solidifying agent are respectively that the model that XXX company produces is the commodity of HM-008A, HM-008A special diluting agent, HM-008B.
5. according to the method for the described chemically coating nickel by magnesium-alloy of claim 2, it is characterized in that described arrangement and activation are that concentration is 85% phosphoric acid with acidic solution.
6. according to the method for the described chemically coating nickel by magnesium-alloy of claim 2, it is characterized in that, mantoquita is the copper sulfate of concentration 8～18g/l in the described chemical copper plating solution, reductive agent is the formaldehyde of concentration 4～18g/l, complexing agent is the EDTA disodium salt of concentration 10～30g/l and the sodium tartrate of concentration 6～20g/l, and stablizer is the pyridine of concentration 2～10mg/l and the yellow prussiate of potash of concentration 2～10mg/l.
7. according to the method for the described chemically coating nickel by magnesium-alloy of claim 2, it is characterized in that the palladium liquid in the activation of described palladium liquid is the pH value in 1.5～3.0 concentration is the palladium chloride solution of 0.02～0.2g/l.
8. according to the method for the described chemically coating nickel by magnesium-alloy of claim 2, it is characterized in that, the process of described chemical nickel plating is, to immerse through the magnesium alloy member after the activation of palladium liquid and contain in the chemical nickel-plating solution of nickel salt, reductive agent, complexing agent, buffered soln and stablizer, controlled temperature is 40～50 ℃, pH value 8.6～9.5, soak time 3～10 minutes is with after washing and oven dry.
9. according to the method for the described chemically coating nickel by magnesium-alloy of claim 8, it is characterized in that, nickel salt is the single nickel salt of concentration 20～30g/l in the described chemical nickel-plating solution, reductive agent is the inferior sodium phosphate of concentration 20～30g/l, complexing agent is the Trisodium Citrate of concentration 15～25g/l, buffered soln is the ammonium chloride solution of concentration 10～20g/l, and stablizer is the sulphur urine of concentration 1～2mg/l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101209852A CN100510172C (en) | 2005-12-22 | 2005-12-22 | Chemical nickel plating process on magnesium alloy |
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| CNB2005101209852A CN100510172C (en) | 2005-12-22 | 2005-12-22 | Chemical nickel plating process on magnesium alloy |
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| CN1986881A true CN1986881A (en) | 2007-06-27 |
| CN100510172C CN100510172C (en) | 2009-07-08 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191491A (en) * | 2010-03-10 | 2011-09-21 | 比亚迪股份有限公司 | Chemical copper-plating solution and chemical copper-plating method |
| CN102405306A (en) * | 2009-03-23 | 2012-04-04 | 安美特德国有限公司 | Pre-treatment process for electroless nickel plating |
| CN103572286A (en) * | 2013-11-07 | 2014-02-12 | 创金美科技（深圳）有限公司 | Recombined deposition and decoration method for magnesium alloy surfaces |
| CN104694913A (en) * | 2015-04-10 | 2015-06-10 | 湖南大学 | Magnesium alloy fluoride-free chemical nickel-plating solution and nickel plating technology thereof |
| CN104878422A (en) * | 2014-02-28 | 2015-09-02 | 比亚迪股份有限公司 | Palladium activating solution, preparation method thereof, and plastic activating method |
| CN105803430A (en) * | 2014-12-31 | 2016-07-27 | 比亚迪股份有限公司 | Magnesium alloy zinc immersion liquid, preparing method for magnesium alloy zinc immersion liquid and magnesium alloy zinc immersion method |
| CN106801335A (en) * | 2016-12-12 | 2017-06-06 | 东莞市佳乾新材料科技有限公司 | A kind of preparation method of high performance surface nickel-coated carbon fibers |
| CN110644016A (en) * | 2019-09-16 | 2020-01-03 | 燕山大学 | Preparation method of nickel phosphide-carbon cloth self-supporting electrode for hydrogen evolution by water and electricity dissociation |
| CN112647103A (en) * | 2020-12-18 | 2021-04-13 | 成都宏明双新科技股份有限公司 | Iron part broken section salt spray test lifting method |
| CN112941495A (en) * | 2021-03-30 | 2021-06-11 | 沈阳富创精密设备股份有限公司 | Chemical nickel plating process on magnesium alloy |
| CN112981402A (en) * | 2020-10-21 | 2021-06-18 | 东莞小禹科技有限公司 | Processing method of metal alloy |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101775606B (en) * | 2010-03-09 | 2011-08-03 | 哈尔滨工程大学 | Nickel plating process method of magnesium alloy |
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2005
- 2005-12-22 CN CNB2005101209852A patent/CN100510172C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102405306A (en) * | 2009-03-23 | 2012-04-04 | 安美特德国有限公司 | Pre-treatment process for electroless nickel plating |
| CN102405306B (en) * | 2009-03-23 | 2013-12-25 | 安美特德国有限公司 | Pre-treatment process for electroless nickel plating |
| CN102191491A (en) * | 2010-03-10 | 2011-09-21 | 比亚迪股份有限公司 | Chemical copper-plating solution and chemical copper-plating method |
| CN103572286B (en) * | 2013-11-07 | 2016-04-13 | 创金美科技（深圳）有限公司 | Mg alloy surface composite deposition trailing |
| CN103572286A (en) * | 2013-11-07 | 2014-02-12 | 创金美科技（深圳）有限公司 | Recombined deposition and decoration method for magnesium alloy surfaces |
| CN104878422A (en) * | 2014-02-28 | 2015-09-02 | 比亚迪股份有限公司 | Palladium activating solution, preparation method thereof, and plastic activating method |
| CN104878422B (en) * | 2014-02-28 | 2017-12-12 | 比亚迪股份有限公司 | A kind of activation method of palladium activating solution and preparation method thereof and plastics |
| CN105803430A (en) * | 2014-12-31 | 2016-07-27 | 比亚迪股份有限公司 | Magnesium alloy zinc immersion liquid, preparing method for magnesium alloy zinc immersion liquid and magnesium alloy zinc immersion method |
| CN105803430B (en) * | 2014-12-31 | 2019-01-11 | 比亚迪股份有限公司 | A kind of magnesium alloy zincate solution and preparation method thereof and magnesium alloy soak zinc method |
| CN104694913A (en) * | 2015-04-10 | 2015-06-10 | 湖南大学 | Magnesium alloy fluoride-free chemical nickel-plating solution and nickel plating technology thereof |
| CN106801335A (en) * | 2016-12-12 | 2017-06-06 | 东莞市佳乾新材料科技有限公司 | A kind of preparation method of high performance surface nickel-coated carbon fibers |
| CN110644016A (en) * | 2019-09-16 | 2020-01-03 | 燕山大学 | Preparation method of nickel phosphide-carbon cloth self-supporting electrode for hydrogen evolution by water and electricity dissociation |
| CN112981402A (en) * | 2020-10-21 | 2021-06-18 | 东莞小禹科技有限公司 | Processing method of metal alloy |
| CN112647103A (en) * | 2020-12-18 | 2021-04-13 | 成都宏明双新科技股份有限公司 | Iron part broken section salt spray test lifting method |
| CN112941495A (en) * | 2021-03-30 | 2021-06-11 | 沈阳富创精密设备股份有限公司 | Chemical nickel plating process on magnesium alloy |
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| CN100510172C (en) | 2009-07-08 |
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