CN103898561A - Electric-plating solution for plating nickel on surface of magnesium alloy die-cast piece - Google Patents
Electric-plating solution for plating nickel on surface of magnesium alloy die-cast piece Download PDFInfo
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- CN103898561A CN103898561A CN201310219708.1A CN201310219708A CN103898561A CN 103898561 A CN103898561 A CN 103898561A CN 201310219708 A CN201310219708 A CN 201310219708A CN 103898561 A CN103898561 A CN 103898561A
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Abstract
The invention discloses an electric-plating solution for plating nickel on the surface of a magnesium alloy die-cast piece. The electroplating solution comprises the following components: 130-150g/L of chromium sulfate, 210-240g/L of sodium sulfate, 0.5-0.9mol/L of ammonium bromide, 1.2-1.8mol/L of boric acid, 0.5-0.9mo/L of sodium hypophosphite, 1.0-1.4mol/L of oxalic acid, 0.02-0.06mol/L of sodium dodecyl sulfate, 0.04-0.08mol/L of ferrous sulfate and the balance of water.
Description
Technical field
The present invention relates to electroplating technology field, relate in particular to a kind of at the chrome faced electroplating solution of magnesium alloy die casting.
Background technology
Magnesium alloy is described as the green metal structured material of 21 century, has that density is low, a specific tenacity and specific rigidity is high and damping and amortization, machinability, castability are superior, in automotive industry, space flight and aviation industry, electronic industry, has obtained increasingly extensive application.Magnesium raw material is abundant, and in natural resources, in the 8th, but as structured material, its solidity to corrosion is poor has restricted the major cause that it uses widely.
The Standard Electrode Potentials of magnesium is-2.34V, there is very high reactive behavior, in air or solution, magnesium alloy can generate one deck passive film as thin as a wafer very soon, thereby while causing plating or electroless plating, metal plating and magnesium substrate adhesion are not strong, do not reach service requirements, in addition according to known to the observation of magnesium alloy materials metal structure, magnesium alloy is to form α phase by purity compared with high magnesium, and the β being formed by alloy ingredient forms mutually, wherein β order skewness and electromotive force are higher than α phase, therefore Mg alloy surface Potential Distributing inequality, galvanic corrosion easily occurs in treatment solution makes Mg alloy surface plating or electroless plating become difficulty, therefore wish obtains the metal plating with good combination power, before plating and electroless plating, must first carry out special pre-treatment to remove surperficial passive film and segregation layer to magnesium alloy materials, to obtain one evenly, clean surface.
Surface pretreatment common method based on magnesium alloy plating or electroless plating has at present: Dow
[1]the zinc method of the soaking technique of company exploitation, main flow process is: oil removing → anode cleaning → acid etching → acid activation → soak zinc → cyanide electroplating.On this basis, constantly improve, as Olsen
[2]the Norsk-Hydro technique proposing: oil removing → acid etching → alkaline purification → soak zinc → cyanide electroplating, Dennis
[3]wCM technique is proposed: oil removing → acid etching → acid activation → soak zinc → cyanide electroplating.In these pre-treating technology plating solutions, contain hypertoxic prussiate, the liquid waste disposal expense of generation is high.
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.
Magnesium alloy die casting has been widely used in the fields such as automobile, traffic, aerospace, and wherein the application of some die casting needs surface that electrolytic coating is set, but the report about the electroplating technology of magnesium alloy die casting in prior art is little.
Summary of the invention
The object of the invention is to propose one at the chrome faced electroplating solution of magnesium alloy die casting, by the adjustment to electroplating solution component, make 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 at the chrome faced electroplating solution of magnesium alloy die casting, described electroplating solution consists of: chromium sulphate 130-150g/L, sodium sulfate 210-240g/L; Brometo de amonio 0.5-0.9mol/L; Boric acid 1.2-1.8mol/L; Inferior sodium phosphate 0.5-0.9mol/L; Oxalic acid 1.0-1.4mol/L; Sodium lauryl sulphate 0.02-0.06mol/L, ferrous sulfate 0.04-0.08mol/L, surplus is water.
Preferably, described electroplating solution consists of: chromium sulphate 140g/L, sodium sulfate 225g/L; Brometo de amonio 0.7mol/L; Boric acid 1.5mol/L; Inferior sodium phosphate 0.7mol/L; Oxalic acid 1.2mol/L; Sodium lauryl sulphate 0.04mol/L, ferrous sulfate 0.06mol/L, surplus is water.
The present invention has advantages of:
The selection of the present invention by solution component and the adjustment of content, make plating solution performance stable, makes the chromium coating bonding force of preparation strong, and metallic coating, coating film thickness is even, solidity to corrosion is high.
Embodiment
Embodiment mono-
A kind of at the chrome faced electroplating solution of magnesium alloy die casting, described electroplating solution consists of: chromium sulphate 130g/L, sodium sulfate 240g/L; Brometo de amonio 0.5mol/L; Boric acid 1.8mol/L; Inferior sodium phosphate 0.5mol/L; Oxalic acid 1.4mol/L; Sodium lauryl sulphate 0.02mol/L, ferrous sulfate 0.08mol/L, surplus is water.
Embodiment bis-
A kind of at the chrome faced electroplating solution of magnesium alloy die casting, described electroplating solution consists of: chromium sulphate 150g/L, sodium sulfate 210g/L; Brometo de amonio 0.9mol/L; Boric acid 1.2mol/L; Inferior sodium phosphate 0.9mol/L; Oxalic acid 1.0mol/L; Sodium lauryl sulphate 0.06mol/L, ferrous sulfate 0.04mol/L, surplus is water.
Embodiment tri-
A kind of at the chrome faced electroplating solution of magnesium alloy die casting, described electroplating solution consists of: chromium sulphate 140g/L, sodium sulfate 225g/L; Brometo de amonio 0.7mol/L; Boric acid 1.5mol/L; Inferior sodium phosphate 0.7mol/L; Oxalic acid 1.2mol/L; Sodium lauryl sulphate 0.04mol/L, ferrous sulfate 0.06mol/L, surplus is water.
Claims (2)
1. at the chrome faced electroplating solution of magnesium alloy die casting, it is characterized in that, described electroplating solution consists of: chromium sulphate 130-150g/L, sodium sulfate 210-240g/L; Brometo de amonio 0.5-0.9mol/L; Boric acid 1.2-1.8mol/L; Inferior sodium phosphate 0.5-0.9mol/L; Oxalic acid 1.0-1.4mol/L; Sodium lauryl sulphate 0.02-0.06mol/L, ferrous sulfate 0.04-0.08mol/L, surplus is water.
2. one as claimed in claim 1, at the chrome faced electroplating solution of magnesium alloy die casting, is characterized in that, described electroplating solution consists of: chromium sulphate 140g/L, sodium sulfate 225g/L; Brometo de amonio 0.7mol/L; Boric acid 1.5mol/L; Inferior sodium phosphate 0.7mol/L; Oxalic acid 1.2mol/L; Sodium lauryl sulphate 0.04mol/L, ferrous sulfate 0.06mol/L, surplus is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219708.1A CN103898561A (en) | 2013-06-03 | 2013-06-03 | Electric-plating solution for plating nickel on surface of magnesium alloy die-cast piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219708.1A CN103898561A (en) | 2013-06-03 | 2013-06-03 | Electric-plating solution for plating nickel on surface of magnesium alloy die-cast piece |
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| Publication Number | Publication Date |
|---|---|
| CN103898561A true CN103898561A (en) | 2014-07-02 |
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| CN201310219708.1A Pending CN103898561A (en) | 2013-06-03 | 2013-06-03 | Electric-plating solution for plating nickel on surface of magnesium alloy die-cast piece |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560815A (en) * | 1994-06-27 | 1996-10-01 | Permelec Electrode Ltd. | Electrolytic chromium plating method using trivalent chromium |
| CN1880512A (en) * | 2006-05-11 | 2006-12-20 | 武汉大学 | Trivalent chromium electroplating solution in sulfate system and method for preparing same |
| CN101638790A (en) * | 2008-07-30 | 2010-02-03 | 深圳富泰宏精密工业有限公司 | Plating method of magnesium and magnesium alloy |
| CN101660182A (en) * | 2009-09-10 | 2010-03-03 | 中国科学院宁波材料技术与工程研究所 | Trivalent chromium electroplate liquid stabilizer and electroplate liquid thereof |
-
2013
- 2013-06-03 CN CN201310219708.1A patent/CN103898561A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560815A (en) * | 1994-06-27 | 1996-10-01 | Permelec Electrode Ltd. | Electrolytic chromium plating method using trivalent chromium |
| CN1880512A (en) * | 2006-05-11 | 2006-12-20 | 武汉大学 | Trivalent chromium electroplating solution in sulfate system and method for preparing same |
| CN101638790A (en) * | 2008-07-30 | 2010-02-03 | 深圳富泰宏精密工业有限公司 | Plating method of magnesium and magnesium alloy |
| CN101660182A (en) * | 2009-09-10 | 2010-03-03 | 中国科学院宁波材料技术与工程研究所 | Trivalent chromium electroplate liquid stabilizer and electroplate liquid thereof |
Non-Patent Citations (2)
| Title |
|---|
| 储荣邦等: "镁合金压铸件上电镀", 《表面工程与资讯》 * |
| 李永彦等: "三价铬硫酸盐电镀铬的发展现状", 《电镀与精饰》 * |
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Application publication date: 20140702 |