Plating solution for electroplating zinc-nickel-copper alloy on surface of magnesium alloy

A technology for electro-galvanizing nickel and copper alloys, which is applied in the field of electro-galvanizing nickel-copper alloy plating solution on the surface of magnesium alloys, can solve the problems of polluted environment, toxic plating solution, complicated process, etc., and achieves high bonding force, beautiful appearance and corrosion resistance. high effect

Inactive Publication Date: 2014-12-24
无锡市锡山区鹅湖镇荡口青荡金属制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is complicated, the repeatability is poor, cyanide is used, the plating solution is poisonous, pollutes the environment, the brightness of the coating and the stability of the plating solution need to be further improved
[0004] In order to overcome the shortcoming of complex process, researchers have developed a direct electroless nickel plating method, such as JP2003073843, which uses chromic anhydride to etch magnesium alloys, performs electroless nickel plating after fluoride activation, and adjusts the electroless nickel plating solution with ammonia water to make it appear Weakly alkaline, once obtained the chemical nickel plating layer with good bonding force and high corrosion resistance, Li Degao et al. used deflocculation → chemical degreasing → light emission → neutralization → activation → pre-treatment in the patent CN1699634A magnesium alloy electroplating method The galvanizing process has obtained a relatively good pre-galvanized layer, and the pre-galvanized solution is cyanide-free, non-toxic and harmless. In the patent CN1737205A, people such as Yang Sheng pickled the magnesium alloy with concentrated hydrofluoric acid (11%) Afterwards, directly electroplate aluminum to obtain a relatively good aluminum coating. Chinese patent CN1641075A has described in detail the surface or activation treatment methods and surface plating methods of magnesium and magnesium alloys. Although these processes are all separated from cyanide electroplating, the treatment before electroplating The process is mostly based on the improvement of the DOW process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A zinc-nickel-copper alloy plating bath for magnesium alloy surface electroplating, said electroplating zinc-nickel-copper alloy plating bath consists of: zinc sulfate 32g / L, copper sulfate 29g / L, copper pyrosulfate 14g / L, nickel sulfate 22g / L, Nickel chloride 5g / L, sodium sulfate 47g / L, K 4 P 2 o 7 ·3H 2 O164g / L, KF20g / L, C 6 h 17 o 7 N 3 32g / L, phytic acid 0.6g / L, H 2 CSNH 2 : 4g / L, brightener WZ112110g / L, brightener WZ-11222g / L, the balance is water.

Embodiment 2

[0014] A zinc-nickel-copper alloy plating solution for magnesium alloy surface electroplating, said electroplating zinc-nickel-copper alloy plating solution consists of: zinc sulfate 36g / L, copper sulfate 25g / L, copper pyrosulfate 18g / L, nickel sulfate 18g / L, Nickel chloride 8g / L, sodium sulfate 43g / L, K 4 P 2 o 7 ·3H 2 O168g / L, KF18g / L, C 6 h 17 o 7 N 3 36g / L, phytic acid 0.4g / L, H 2 CSNH 2 : 6g / L, brightener WZ11218g / L, brightener WZ-11223g / L, the balance is water.

Embodiment 3

[0016] A zinc-nickel-copper alloy plating solution for magnesium alloy surface electroplating, said electroplating zinc-nickel-copper alloy plating solution consists of: zinc sulfate 34g / L, copper sulfate 27g / L, copper pyrosulfate 16g / L, nickel sulfate 20g / L, Nickel chloride 6.5g / L, sodium sulfate 45g / L, K 4 P 2 o 7 ·3H 2 O166g / L, KF19g / L, C 6 h 17 o 7 N 3 34g / L, phytic acid 0.5g / L, H 2 CSNH 2 : 5g / L, brightener WZ11219g / L, brightener WZ-11222.5g / L, the balance is water.

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PUM

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Abstract

The invention discloses a plating solution for electroplating a zinc-nickel-copper alloy on a surface of a magnesium alloy. The plating solution for electroplating the zinc-nickel-copper alloy is composed of 32-36 g / L of zinc sulfate, 25-29 g / L of copper sulfate, 14-18 g / L of copper pyrosulfate, 18-22 g / L of nickel sulfate, 5-8 g / L of nickel chloride, 43-47 g / L of sodium sulfate, 164-168 g / L of K4P2O7.3H2O, 18-20 g / L of KF, 32-36 g / L of C6H17O7N3, 0.4-0.6 g / L of phytic acid, 4-6 g / L of H2CSNH2, 8-10 g / L of a brightener WZ1121, 2-3 g / L of a brightener WZ1122, and the balance being water.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a zinc-nickel-copper alloy plating solution for magnesium alloy surface electroplating. Background technique [0002] As a lightweight engineering structural material, magnesium alloy has high specific strength, high specific stiffness and superior shock absorption performance, and has a wide range of applications in transportation, communication, aviation, aerospace and other fields. However, magnesium alloys have high chemical activity, low electrode potential, and loose oxide film on the surface, resulting in low protection performance, which restricts the application and development of magnesium alloys. This has aroused people's attention to the surface corrosion and protection of magnesium alloy parts, and a lot of research has been done on the surface of magnesium alloys, such as anodic oxidation, chemical conversion film, organic coating, surface plating, etc., espe...

Claims

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Application Information

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IPC IPC(8): C25D3/56
Inventor钱永清
Owner无锡市锡山区鹅湖镇荡口青荡金属制品厂