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Novel agent preventing silver coating from coloring in cyanide silver plating process

A discoloration agent and anti-plating technology, applied in the direction of metal material coating process, anti-corrosion coating, etc., to achieve the effect of reducing production costs

Inactive Publication Date: 2009-01-21
上海电气集团上海电机厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And present known anti-silver discoloration agent can not satisfy above-mentioned all requirements

Method used

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  • Novel agent preventing silver coating from coloring in cyanide silver plating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of new anti-silver coating discoloration agent for cyanide silver plating process, its component and content are:

[0027] Vaseline 15%~30%

[0028] KC-E103 85%~70%

[0029] All percentages are percentages by weight. The above-mentioned KC-E103 is a charged cleaning agent produced by Shanghai Jushi Co., Ltd.

[0030] The above two components are fully stirred and mixed at room temperature.

Embodiment 2

[0032] A kind of new anti-silver coating discoloration agent for cyanide silver plating process, its component and content are:

[0033] Medical Vaseline 15%~30%

[0034] KC-E103 85%~70%

[0035] All percentages are percentages by weight. The above-mentioned KC-E103 is a charged cleaning agent produced by Shanghai Jushi Co., Ltd. Among them, medical Vaseline is the medical Vaseline purchased in general pharmacies, such as Shanghai Leiyunshang Pharmacy and other pharmacies can be purchased.

[0036] The above two components are fully stirred and mixed at room temperature.

Embodiment 3

[0038] Preferably, the above-mentioned new anti-silvering layer discoloration agent SD-2 for cyanide silver plating process, its components and content are:

[0039] Medical Petroleum Jelly 25%

[0040] KC-E103 75%

[0041] All percentages are by weight. The KC-E103 mentioned above is a live cleaning agent produced by Shanghai Jushi Co., Ltd.

[0042] The above two components are fully stirred and mixed at room temperature.

[0043] Instructions:

[0044] It should be thoroughly stirred first. Small parts can be dipped, large parts can be applied by brushing or spraying and then allowed to dry naturally.

[0045] Further illustrate the effect of this anti-silvering layer discoloration agent with test below.

[0046] 1. Outdoor air exposure test

[0047] The general classification of silver plating layer is as follows:

[0048] Grade A: no discoloration, basically maintain the original coating color;

[0049] Grade B: local slight discoloration, the color is light yell...

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Abstract

The invention relates to the silver discoloration prevention field, in particular to a novel silver coating discoloration preventing agent for the cyanide silver plating process. The content of components of the novel silver coating discoloration preventing agent for the cyanide silver plating process is 15 to 30 percent of Vaseline and 85 to 70 percent of KC-E103, wherein all percentages are weight percentages. With the technical solution, the problem that silver coatings are easy to discolor in the prior cyanide silver plating process is solved , and production cost is remarkably reduced.

Description

technical field [0001] The invention relates to the field of anti-silver discoloration, in particular to a new anti-silver layer discoloration agent used in the cyanide silver plating process. Background technique [0002] Silver has good electrical conductivity, thermal conductivity and reflective ability, good solderability, easy polishing, and good bonding force with the substrate. Silver plating has a wide range of uses in the motor industry, mainly for conductive components and contact components on steam generators and large synchronous motor products. The silver-plated layer is easy to change color in the air. The color change not only affects the appearance, but more importantly, it increases the contact resistance of the component, affects the conductivity of the conductive component and the contact component, and also easily causes difficulties in silver-plated soldering. [0003] The current domestic and foreign technologies for preventing discoloration of the si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C23C22/02
Inventor 张培林
Owner 上海电气集团上海电机厂有限公司
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