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Chromium-free passivator for electronic device metal plate and preparation method thereof

A chromium-free passivation agent and electronic device technology, applied in the direction of metal material coating process, etc., can solve the problems of unsatisfactory passivation effect, high cost of passivation agent, no chromium-free passivation agent, etc., and achieve good Anti-scratch performance, low equipment requirements, suitable for mass production

Active Publication Date: 2018-09-21
泰安泰山科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing chromium-free passivators either use molybdate as the main component or rare earth metal salts as the main component, but the cost of these passivators is relatively high, and the passivation effect is not ideal, which cannot fully meet the needs of the industry. Market demand
So far, there is no chromium-free passivating agent that is really satisfactory and has a better market prospect in this technical field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A chromium-free passivator for metal plates of electronic devices, including the following raw materials in parts by mass: 20 parts of phytic acid, 5 parts of sodium tungstate, 10 parts of sodium citrate, 5 parts of rosin resin, polytetrafluoroethylene concentrate 16 parts of dispersion liquid, 7 parts of fatty alcohol polyoxyethylene ether, 6 parts of ammonium vanadate, 3 parts of glucose, 3 parts of aluminum stearate, 15 parts of ethanol, 18 parts of water, wherein the polytetrafluoroethylene concentrated dispersion liquid is solid The content is 58%.

[0023] The above-mentioned preparation method for the chromium-free passivating agent of electronic device metal plate, comprises the steps:

[0024] (1) Ammonium vanadate is first added to water, then sodium tungstate and sodium citrate are added, and stirred evenly to obtain mixture A;

[0025] (2) Add phytic acid, rosin resin, fatty alcohol polyoxyethylene ether and glucose to ethanol in sequence, and stir at 110r / ...

Embodiment 2

[0028] A chromium-free passivator for metal plates of electronic devices, including the following raw materials in parts by mass: 23 parts of phytic acid, 6 parts of sodium tungstate, 12 parts of sodium citrate, 7 parts of rosin resin, polytetrafluoroethylene concentrate 20 parts of dispersion liquid, 8 parts of fatty alcohol polyoxyethylene ether, 9 parts of ammonium vanadate, 5 parts of glucose, 5 parts of aluminum stearate, 18 parts of ethanol, 21 parts of water, wherein the polytetrafluoroethylene concentrated dispersion liquid is solid The content is 59%.

[0029] The above-mentioned preparation method for the chromium-free passivating agent of electronic device metal plate, comprises the steps:

[0030] (1) Ammonium vanadate is first added to water, then sodium tungstate and sodium citrate are added, and stirred evenly to obtain mixture A;

[0031] (2) Add phytic acid, rosin resin, fatty alcohol polyoxyethylene ether and glucose to ethanol in sequence, and stir at 115r / ...

Embodiment 3

[0034] A chromium-free passivator for metal plates of electronic devices, including the following raw materials in parts by mass: 26 parts of phytic acid, 8 parts of sodium tungstate, 15 parts of sodium citrate, 9 parts of rosin resin, polytetrafluoroethylene concentrated 23 parts of dispersion liquid, 10 parts of fatty alcohol polyoxyethylene ether, 12 parts of ammonium vanadate, 6 parts of glucose, 7 parts of aluminum stearate, 20 parts of ethanol, 25 parts of water, wherein the polytetrafluoroethylene concentrated dispersion liquid is solid The content is 60%.

[0035] The above-mentioned preparation method for the chromium-free passivating agent of electronic device metal plate, comprises the steps:

[0036] (1) Ammonium vanadate is first added to water, then sodium tungstate and sodium citrate are added, and stirred evenly to obtain mixture A;

[0037] (2) Add phytic acid, rosin resin, fatty alcohol polyoxyethylene ether and glucose to ethanol in sequence, and stir at 12...

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Abstract

The invention specifically relates to a chromium-free passivating agent used for an electronic device metal plate and a preparation method for the chromium-free passivating agent, and belongs to the technical field of metal surface treatment. The chromium-free passivating agent used for the electronic device metal plate comprises the following raw materials in parts by mass: 20-32 parts of phytic acid, 5-10 parts of sodium tungstate, 10-20 parts of sodium citrate, 5-14 parts of rosin resin, 16-28 parts of a polytetrafluoroethylene concentrated dispersion liquid, 7-13 parts of fatty alcohol-polyoxyethylene ether, 6-15 parts of ammonium vanadate, 3-8 parts of glucose, 3-10 parts of aluminum stearate, 15-26 parts of alcohol and 18-30 parts of water. The chromium-free passivating agent used for the electronic device metal plate has the advantages of being strong in corrosion resistance and good in scraping resistance, does not contain hexavalent chromium, and is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a chromium-free passivator for metal plates of electronic devices and a preparation method thereof. Background technique [0002] Since metals are prone to corrosion due to long-term exposure to air and moisture, passivation treatment is usually performed to improve corrosion resistance in order to form a protective film on the metal surface. [0003] The use of traditional hexavalent chromium passivators can effectively improve the corrosion resistance of metals, but hexavalent chromium is harmful to health and pollutes the environment, so it is gradually eliminated. Coupled with the implementation of the RoHS directive, people continue to study chromium-free passivators, especially chromium-free passivators suitable for electronic devices. The RoHS Directive, the "Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Eq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/40
CPCC23C22/40
Inventor 尤为
Owner 泰安泰山科技有限公司
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