CN103898566A - Technology for electro-nickeling surface of magnesium alloy notebook computer case - Google Patents
Technology for electro-nickeling surface of magnesium alloy notebook computer case Download PDFInfo
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- CN103898566A CN103898566A CN201310218953.0A CN201310218953A CN103898566A CN 103898566 A CN103898566 A CN 103898566A CN 201310218953 A CN201310218953 A CN 201310218953A CN 103898566 A CN103898566 A CN 103898566A
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- magnesium alloy
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Abstract
The invention discloses a technology for electro-nickeling the surface of a magnesium alloy notebook computer case. The technology comprises the following steps sequentially: alkali washing, acid washing, activation, zinc dipping, cyanide-free copper plating, and electro-nickeling, wherein the electro-nickeling solution comprises the following active ingredients: 210-220g/L of nickel sulfate, 15-25g/L of nickel chloride, 52-56g/L of boric acid, 20-26g/L of potassium sulfate, 0.5-1.5g/L of sodium dodecyl sulfonate, 8-12g/L trisodium citrate, 36-40g/L of anhydrous sodium acetate, 30-40g/L of ethoxylated butynediol, 3-4g/L of propionic acid and the balance of water; and the conditions of the technology are as follows: pH value is 3.5-4.5, the current density is 2.5-3.5A/dm<2>, the temperature is 65-75DEG C, and the time is 20-30min.
Description
Technical field
The present invention relates to electroplating technology field, relate in particular to a kind of in magnesium alloy notebook computer casing electroplating nickel on surface technique.
Background technology
Magnesium alloy has that proportion is little, damping performance good, has compared with high specific strength, specific rigidity with than Young's modulus and heat conductivity, capability of electromagnetic shielding etc. preferably, and the shell that is suitable for use as notebook computer is made.But magnesium alloy chemical activity is high, and electropotential is low, surface film oxide is loose, causes barrier propterty low, has restricted the application and development of magnesium alloy.Cause thus the concern of people to magnesium alloy part surface corrosion and protection, carry out a large amount of research at aspects such as Mg alloy surface anodic oxidation, chemical conversion film, organic coating, coating surfaces, particularly adopt that method for electroplating nickel is low as a kind of cost, technique is simple, the surface coating technique of easy handling, has become the important research direction of people to magnesium alloy surface protective.
Generally to pass through pretreatment process to electroplating nickel on surface of magnesium alloy, to avoid the corrosion of matrix in bath solution.The pre-treatment of electronickelling at present mainly contains two kinds of processing methodes, the one, immersion plating zinc-cyanide copper plating process; The 2nd, repeatedly immersion plating zinc-electro-galvanizing-copper plating process.The former has adopted poisonous prussiate, can produce severe contamination to ecotope; The latter's electroplate liquid poor stability, pyrophosphate copper plating process parameter control is strict, and quality of coating stability is very responsive to it, for operator makes troubles.After pre-treatment completes, carry out nickel plating with fluoroborate or sulfamate plating solution again, avoid adopting the quality problems such as the corrosion to matrix that vitriol cheap, that technique is simple, easy to operate (watt plating solution) nickel plating brings and coating crystallization be thick.
Under the pressure of increasingly serious resources and environment protection; carrying out the researchs of magnesium metallic substance and anti-corrosion method thereof is one of urgent task of world's Sustainable development; although obtaining interim progress aspect magnesium alloy protection in recent years; and be applied in certain field, but still there is no to form the method that can replace traditional magnesium alloy plating completely.Therefore the electroplating technology that, hope can be developed a kind of environmental protection meets the production requirement of modern clean energy-saving.
Summary of the invention
The object of the invention is to propose a kind of in magnesium alloy notebook computer casing electroplating nickel on surface technique, this technique is by the adjustment to electronickelling bath composition, do not adopt poisonous, pollute high component, make plating technic Environmental Safety, and the corrosion-resistant height of coating of preparation, appearance looks elegant, matrix and binding force of cladding material are high.
For reaching this object, the present invention by the following technical solutions:
A kind of in magnesium alloy notebook computer casing electroplating nickel on surface technique, described technique comprises the steps: alkali cleaning → pickling → activate → soak zinc → non-cyanide copper electroplating → electronickelling, and wherein electronickelling plating solution consists of: single nickel salt 210-220g/L, nickelous chloride 15-25g/L, boric acid 52-56g/L, potassium sulfate 20-26g/L, sodium laurylsulfonate 0.5-1.5g/L, trisodium citrate 8-12g/L, anhydrous sodium acetate 36-40g/L, ethoxyquin butynediol 30-40mg/L, propionic acid 3-4g/L, surplus is water; Processing condition are: pH value 3.5-4.5; Current density 2.5-3.5A/dm
2, temperature 65-75 ℃, time 20-30min.
The present invention has advantages of:
The present invention is by the selection to each electronickelling plating solution and the adjustment of content, make plating solution performance stable, make to process each time and all obtained good technique effect, for subsequent technique is laid a good foundation, the chromium coating bonding force of final preparation is strong, and metallic coating, coating film thickness is even, solidity to corrosion is high.Whole plating process does not adopt prussiate, and the fluorochemical amount ratio prior art of selecting is few, therefore, and this plating technic environmental protection.
Embodiment
Embodiment mono-
A kind of in magnesium alloy notebook computer casing electroplating nickel on surface technique, described technique comprises the steps: alkali cleaning → pickling → activate → soak zinc → non-cyanide copper electroplating → electronickelling, and wherein electronickelling plating solution consists of: single nickel salt 210g/L, nickelous chloride 25g/L, boric acid 52g/L, potassium sulfate 26g/L, sodium laurylsulfonate 0.5g/L, trisodium citrate 12g/L, anhydrous sodium acetate 36g/L, ethoxyquin butynediol 40mg/L, propionic acid 3g/L, surplus is water; Processing condition are: pH value 3.5-4.5; Current density 2.5-3.5A/dm
2, temperature 65-75 ℃, time 30min.
Embodiment bis-
A kind of in magnesium alloy notebook computer casing electroplating nickel on surface technique, described technique comprises the steps: alkali cleaning → pickling → activate → soak zinc → non-cyanide copper electroplating → electronickelling, and wherein electronickelling plating solution consists of: single nickel salt 220g/L, nickelous chloride 15g/L, boric acid 56g/L, potassium sulfate 20g/L, sodium laurylsulfonate 1.5g/L, trisodium citrate 8g/L, anhydrous sodium acetate 40g/L, ethoxyquin butynediol 30mg/L, propionic acid 4g/L, surplus is water; Processing condition are: pH value 3.5; Current density 2.5-3.5A/dm
2, temperature 65-75 ℃, time 30min.
Embodiment tri-
A kind of in magnesium alloy notebook computer casing electroplating nickel on surface technique, described technique comprises the steps: alkali cleaning → pickling → activate → soak zinc → non-cyanide copper electroplating → electronickelling, and wherein electronickelling plating solution consists of: single nickel salt 215g/L, nickelous chloride 20g/L, boric acid 54g/L, potassium sulfate 23g/L, sodium laurylsulfonate 1.0g/L, trisodium citrate 10g/L, anhydrous sodium acetate 38g/L, ethoxyquin butynediol 35mg/L, propionic acid 3.5g/L, surplus is water; Processing condition are: pH value 3.5-4.5; Current density 2.5-3.5A/dm
2, temperature 65-75 ℃, time 25min.
Claims (1)
1. one kind in magnesium alloy notebook computer casing electroplating nickel on surface technique, it is characterized in that, described technique comprises the steps: alkali cleaning → pickling → activate → soak zinc → non-cyanide copper electroplating → electronickelling, wherein electronickelling plating solution consists of: single nickel salt 210-220g/L, nickelous chloride 15-25g/L, boric acid 52-56g/L, potassium sulfate 20-26g/L, sodium laurylsulfonate 0.5-1.5g/L, trisodium citrate 8-12g/L, anhydrous sodium acetate 36-40g/L, ethoxyquin butynediol 30-40mg/L, propionic acid 3-4g/L, surplus is water; Processing condition are: pH value 3.5-4.5; Current density 2.5-3.5A/dm
2, temperature 65-75 ℃, time 20-30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310218953.0A CN103898566A (en) | 2013-06-04 | 2013-06-04 | Technology for electro-nickeling surface of magnesium alloy notebook computer case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310218953.0A CN103898566A (en) | 2013-06-04 | 2013-06-04 | Technology for electro-nickeling surface of magnesium alloy notebook computer case |
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| CN103898566A true CN103898566A (en) | 2014-07-02 |
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| CN201310218953.0A Pending CN103898566A (en) | 2013-06-04 | 2013-06-04 | Technology for electro-nickeling surface of magnesium alloy notebook computer case |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03240975A (en) * | 1990-02-19 | 1991-10-28 | Fujitsu Ltd | Surface treatment of magnesium alloy |
| CN1598059A (en) * | 2004-08-05 | 2005-03-23 | 广州杰赛科技股份有限公司 | Magnesium alloy non cyanogen plating copper chemical plating nickle and its plating process |
| CN101525711A (en) * | 2009-04-22 | 2009-09-09 | 东南大学 | Magnesium alloy with zinc and nickel compound plating layers and preparation method thereof |
-
2013
- 2013-06-04 CN CN201310218953.0A patent/CN103898566A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03240975A (en) * | 1990-02-19 | 1991-10-28 | Fujitsu Ltd | Surface treatment of magnesium alloy |
| CN1598059A (en) * | 2004-08-05 | 2005-03-23 | 广州杰赛科技股份有限公司 | Magnesium alloy non cyanogen plating copper chemical plating nickle and its plating process |
| CN101525711A (en) * | 2009-04-22 | 2009-09-09 | 东南大学 | Magnesium alloy with zinc and nickel compound plating layers and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 卢神保: "AZ91D镁合金表面电镀铜/镍新工艺研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》, no. 4, 15 April 2010 (2010-04-15) * |
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Application publication date: 20140702 |
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