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Method of silver-tarnishing prevention for silver-plated element of communication product

A technology for preventing silver discoloration and silver parts, which is applied in the field of anti-silver discoloration of silver-plated parts of communication products. The effect of easy operation process

Inactive Publication Date: 2012-06-06
NANJING PANDA HANDA TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, DJB823 electrical contact protection agent is used to coat silver-plated parts to prevent silver discoloration, but the effect is found to be unsatisfactory during use, and often within a month, the silver-plated parts begin to change color
The coating process of DJB823 electrical contact protection agent is complicated, and heating is required during the operation process, which increases potential safety hazards
The cost of DJB823 electrical contact protection agent is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] a) Pour the electrical contact protection agent SP-into a clean and dry glass, enamel, or PE plastic container, use it directly or add butyl ether oxide or propargyl oxide, the amount of addition is 0.06-0.1g / L;

[0013] b) Dip coating: Put the parts into the protective agent and shake them slightly to remove the air. There should be no adhesion between the parts, soak for 2 minutes;

[0014] c) Brushing: Use a clean and dry soft brush to evenly apply the protective agent on the surface of the parts, and the gaps of the parts should be soaked;

[0015] d) Natural drying, hot air drying or drying (the temperature shall not exceed 120°C);

[0016] e) Pour the excess protective agent back into the original packaging container, cover and seal to prevent volatilization;

[0017] f) If it is recycled for a long time, the protective agent will have turbid dirt, which can be filtered with filter paper or ultra-fine nylon filter. The electrical contact protection agent SP-2002...

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PUM

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Abstract

The invention provides a method of silver-tarnishing prevention for a silver-plated element of a communication product. The method comprises the following steps: pouring an electrical contact protection agent SP-2002S into a container; putting silver-plated elements into the protection agent for dip-coating, shaking the container so as to exhaust air, enabling the elements not to adhere to each other and carrying out dip-coating for 2 +- 1 min; carrying out brush coating, that is, taking some of the protection agent with a clean dry soft brush and uniformly brushing the protection agent on the surfaces of the elements, wherein, slits of the elements should be soaked; naturally drying the elements in the air or drying the elements with hot air at a temperature of no more than 120 DEG C. Particularly, 0.06 to 0.1 g / L of MOSS or PESS is added into the electrical contact protection agent SP-2002S.

Description

1. Technical field: [0001] The invention relates to a method of an electric contact protective agent for preventing silver discoloration of silver-plated pieces of communication products capable of satisfying high reliability. 2. Background technology: [0002] Silver has bright silvery white, good electrical conductivity, thermal conductivity, reflective ability and welding performance, which opens up broad prospects for the application of silver coating in industry. In recent years, with the rapid development of communication, silver plating is increasingly used in conductive components and electrical contact components of electronic equipment. But the silver coating has a fatal weakness, that is, silver is easily corroded by sulfur compounds in the atmosphere and changes color, gradually changing from shiny luster to yellow, brown streaks, and finally dark brown, which seriously affects the appearance of the silver coating. quality, greatly reducing its decorativeness. ...

Claims

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Application Information

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IPC IPC(8): C23F11/00
Inventor 吴勇
Owner NANJING PANDA HANDA TECH
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