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Chemical nickel-plating solution and preparation method of low-porosity chemical nickel-plating layer

A technology of electroless nickel plating and porosity, applied in liquid chemical plating, coating, metal material coating process, etc., can solve the problems of long process, difficult operation, long film formation time, etc., and achieve good corrosion resistance and Wear resistance, low coating porosity, bright surface effect

Inactive Publication Date: 2012-01-04
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0004] The traditional process of electroless nickel plating on magnesium alloys is long, requires a long time to form a film, is difficult to operate, and is difficult to control. Moreover, the Ni-P coating has a large porosity, poor corrosion resistance, and limited protection of the substrate by the coating.

Method used

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Embodiment Construction

[0017] The plating solution used in this embodiment includes NiSO 4 ·6H 2 O: 20g / L, NaH 2 PO 2 ·H 2 O: 20g / L, C 6 h 8 o 7 ·H 2 O: 5g / L, CH 3 CHOHCOOH 10g / L, NH 4 HF 2 : 15g / L, HF (40%): 10ml / L, NCSNH 2 0.6mg / L, NH 4 OH 50ml / L, C 6 h 5 NaO 7 2H 2 O: 15g / L.

[0018] The used plating solution preparation method of this method is identical with conventional plating solution preparation method, the preparation of electroless plating solution: at first dissolve above-mentioned medicine with distilled water, and mix after being diluted to corresponding concentration, adjust pH value to 6.0 then, obtained solution That is, chemical plating solution.

[0019] Before performing electroless nickel plating on magnesium alloy specimens, pre-plating treatment should be performed on magnesium alloy specimens. The treatment process includes: grinding, cleaning, alkali washing, pickling and activation. After each step, rinse with distilled water and dry.

[0020] Then fini...

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PUM

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Abstract

The invention discloses a chemical nickel-plating solution. The chemical nickel-plating solution comprises the following components: 10-30g / L of NiSO4.6H2O, 10-30g / L of NaH2PO2.H2O, 3-8g / L of C6H8O7.H2O, 5-20g / L of CH3CHOHCOOH, 8-25g / L of NH4HF2, 5-20ml / L of 20-50% HF, 0.2-1mg / L of NCSNH2, 20-80ml / L of NH4OH and 10-30g / L of C6H5NaO7.2H2O. According to the invention, the nickel layer with low porosity can be obtained by carrying out chemical nickel plating utilizing the chemical nickel-plating solution. The preparation method is simple in process, and is easy to control; and the chemical nickel-plating solution has a good film forming effect, and can be used for solving the problem that the anticorrosion property of the chemical nickel-plating layer is low.

Description

technical field [0001] The invention relates to electroless nickel plating, a surface treatment method of magnesium alloy, specifically a preparation method of magnesium alloy electroless nickel plating solution and low porosity electroless nickel plating layer. Background technique [0002] Due to its small specific gravity, high strength, good thermal conductivity, good shock absorption and easy recycling, magnesium alloy is called the green engineering material of the 21st century and is widely used in aviation, aerospace, automobile industry and 3C products . However, the poor corrosion resistance of magnesium alloys restricts its application. [0003] At present, there are many surface treatment methods widely used to improve the corrosion resistance of magnesium alloys, but the electroless nickel plating method is generally used to protect magnesium alloys. For example, CN1598053A discloses a process for carrying out electroless nickel plating on magnesium alloys. In...

Claims

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Application Information

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IPC IPC(8): C23C18/36
Inventor 张秀芝李英杰许刚熊俊波朱华军
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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