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A kind of electroplating solution additive for electroplating bright nickel-titanium alloy

A titanium alloy and electroplating solution technology, applied in the field of electroplating solution additives for electroplating bright nickel-titanium alloys, can solve the problems of pinholes, pitting, affecting product quality, lack of brightness and uniformity of workpieces, and saving nickel. , The effect of wide brightness and toughness growth

Active Publication Date: 2016-08-10
湖北广志科技服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The workpieces of the general nickel-titanium alloy electroplating process often have insufficient brightness and uniformity, and sometimes appear pinholes and pits, which affect product quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1 0

[0050] Time Example 1 10 min, Example 2 20 min, Example 3 30 min

[0051] 3) The electroplating process of the three examples is as follows:

[0052] Workpiece → chemical degreasing → hot water washing → cold water washing → electrochemical degreasing → hot water washing → cold water washing → rust removal → cold water washing → cold water washing → bright nickel-titanium alloy plating → water washing → drying.

[0053] 4) Experimental effects of three examples:

[0054] The nickel-titanium alloy coatings obtained in the three examples are bright, detailed, and soft, and the color is similar to Cr coatings.

[0055] Through destructive experiments and inspections, the nickel-titanium alloy coatings obtained in the three examples have good adhesion to the copper and nickel layers, no shedding, no brittleness, no pinholes, and no cracks; the corrosion resistance is better than Ni, Ni+ Cr plating.

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PUM

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Abstract

The invention provides an electroplating solution bright additive and auxiliary additive for electroplating a bright nickel-titanium alloy. The bright additive is composed of 30-40 g / L propane sulfonate pyridine, 40-50 g / L propane alcohol ethoxy ether, 30-50 g / L N,N-diethylallylene amine formate, 5-10 g / L propiolic alcohol, 10-12 g / L sodium hydroxymethyl sulfonate and the balance of distilled water or deionized water. The auxiliary additive is composed of 180-200 g / L saccharin (or soluble saccharin), 200-250 g / L dilute sodium propyl sulfonate (35%), 5-10 g / L sodium hydroxypropyl thiosulfate and the balance of distilled water or deionized water. The additives are simple in components, non-toxic and pollution-free, and free of Cr<6+>.When the invention is used for electroplating the bright nickel-titanium alloy, the wear resistance, corrosion resistance and toughness of the coating are greatly enhanced. The invention has very important actions in common industry and in the fields of military affairs, national defense, aerospace and submarine ships.

Description

Technical field [0001] The invention relates to a metal electroplating method and electroplating solution, in particular to an electroplating solution additive for electroplating bright nickel-titanium alloy. Background technique [0002] In the usual decorative electroplating production, chromium plating is often used as the final process. This is because the chromium plating layer has a bright and white appearance, and has the characteristics of high hardness, strong wear resistance, corrosion resistance, and high temperature resistance. It is widely used . However, because the chromium plating process still uses the more toxic hexavalent chromium salt, it has great harmful effects on the environment, water source, atmosphere, and human body. [0003] The research and development of new and environmentally friendly chromium coatings has great application prospects and significant social and economic benefits. The electroplating process of nickel-titanium alloy is one of the tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56
Inventor 吴慧敏
Owner 湖北广志科技服务有限公司
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