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Environment-friendly electroplating formula with cobalt-based ternary alloy replacing hard chromium plating and preparation method thereof

A ternary alloy, hard chrome plating technology, applied in the field of environmental protection electroplating formula and its preparation, can solve problems such as environmental pollution of hexavalent chromium, and achieve the effects of good stability, good binding force and saving power consumption

Inactive Publication Date: 2016-04-27
SHANGHAI YOUXIANG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a cobalt-based ternary alloy instead of hard chromium plating environmental protection electroplating formula and its preparation method, which solves the environmental pollution problems of hexavalent chromium, as well as technical difficulties such as coating hardness and bonding force

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The raw material and content of the cobalt-based ternary alloy of the present invention to replace the hard chromium plating environmental protection electroplating formula are as follows:

[0016] Cobalt sulfate heptahydrate 30g / L,

[0017] Nickel sulfate hexahydrate 15g / L,

[0018] Sodium tungstate dihydrate 30g / L,

[0019] Citric acid monohydrate 70g / L,

[0020] Sodium lauryl sulfate 0.5g / L;

[0021] Adjust the pH to 7, electroplate with electrolyte solution at a current density of 1~5A / dm2 and a temperature of 60°C, wash and dry after plating.

Embodiment 2

[0023] The raw material and content of the cobalt-based ternary alloy of the present invention to replace the hard chromium plating environmental protection electroplating formula are as follows:

[0024] Cobalt sulfate heptahydrate 60g / L,

[0025] Nickel sulfate hexahydrate 10g / L,

[0026] Sodium tungstate dihydrate 50g / L,

[0027] Citric acid monohydrate 100g / L,

[0028] Sodium lauryl sulfate 0.25g / L;

[0029] Adjust the pH to 6.5, electroplate with electrolyte solution at a current density of 1~5A / dm2 and a temperature of 80°C, wash and dry after plating.

Embodiment 3

[0031] The raw material and content of the cobalt-based ternary alloy of the present invention to replace the hard chromium plating environmental protection electroplating formula are as follows:

[0032] Cobalt sulfate heptahydrate 80g / L,

[0033] Nickel sulfate hexahydrate 10g / L,

[0034] Sodium tungstate dihydrate 40g / L,

[0035] Citric acid monohydrate 90g / L,

[0036] Sodium lauryl sulfate 0.25g / L;

[0037] Adjust the pH to 7.5, electroplate with electrolyte solution at a current density of 1~5A / dm2 and a temperature of 75°C, wash and dry after plating.

[0038] The preparation method of the cobalt-based ternary alloy of the present invention to replace the hard chromium plating environmental protection electroplating formula comprises the following steps:

[0039] Step 1, the raw materials used in the electroplating formula include: cobalt sulfate heptahydrate, nickel sulfate hexahydrate, sodium tungstate dihydrate, citric acid monohydrate, ammonia water, sodium laury...

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PUM

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Abstract

The invention discloses an environment-friendly electroplating formula with cobalt-based ternary alloy replacing hard chromium plating and a preparation method thereof. The environment-friendly electroplating formula with the cobalt-based ternary alloy replacing hard chromium plating includes cobaltous sulfate heptahydrate, nickel sulfate hexahydrate, sodium tungstate dihydrate, citric acid monohydrate and sodium lauryl sulfate. By means of the environment-friendly electroplating formula with the cobalt-based ternary alloy replacing hard chromium plating and the preparation method thereof, the problem of environmental pollution caused by hexavalent chromium is solved, and the technical difficulty on the aspects of hardness and bonding force of a plating layer is overcome.

Description

technical field [0001] The invention relates to an environmentally friendly electroplating formula and a preparation method thereof, in particular to a cobalt-based ternary alloy replacing hard chromium plating and an environmentally friendly electroplating formula and a preparation method thereof. Background technique [0002] Hard chromium plating is a traditional method with a history of more than 70 years. The two most basic uses of hard chromium plating are: first, to provide a wear-resistant surface and prolong service life; second, to repair damaged parts, among which It is widely used to repair mechanical wear parts. Hard chrome plating has been used successfully for corrosion, long wear, fatigue and impact performance. It has become increasingly important to find alternatives to chrome plating because of the environmental concerns associated with the plating process. It's not chromium plating, it's like the problem of fumes released during hexavalent chromium ion ...

Claims

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Application Information

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IPC IPC(8): C25D3/56
Inventor 陈松祺万宗跃何君陈明伟王莉
Owner SHANGHAI YOUXIANG CHEM CO LTD
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