Multifunctional solution for cleaning and no-chromium deactivation of no-freon refrigerating pipe

A chrome-free passivation and Freon-free technology, applied in the direction of metal material coating process, etc., can solve the problem of inability to meet the passivation requirements of Freon-free refrigeration parts, poor anti-humidity cycle test performance, and the overall effect is not as good as chromate passivation, etc. question
CN1888137AInactive Publication Date: 2007-01-03合肥华清方兴表面技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
合肥华清方兴表面技术有限公司
Publication Date
2007-01-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to deactivator for refrigerating part of copper, and is especially no-chromium deactivator for refrigerating part of copper. The no-chromium deactivator is the mixture of citric acid, sodium molybdate, urea, benzotriazole, ammonium acrylate, pyrrolidone, benzylalcohol, phenyl glycol ether, phenyl carbitol, amino trimethylene phosphonic acid and water. It is colorless, transparent, non-toxic and harmful multifunctional solution for cleaning and deactivating no Freon refrigerating pipe through soaking or spraying. It has simplified and environment friendly cleaning and deactivating process.
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Description

technical field

[0001] The invention relates to a passivator for copper refrigeration parts, in particular to a chromium-free passivator for copper refrigeration parts. Background technique

[0002] The main material of Freon-free refrigeration pipe fittings is copper and its alloys, but due to the O in the air 2 , CO 2 、H 2 S and SO 2 It is easy to react with copper to make the surface black, which affects its appearance and thermal conductivity, so the cooling pipe must be passivated. At the same time, in order to fulfill the requirements of the "Montreal Protocol on Substances that Deplete the Ozone Layer", domestic refrigeration companies will eventually eliminate ozone-depleting substances in 2010, so in recent years, CFC-free refrigerators (refrigerators, air conditioners) have been introduced. The research found that one of the key technologies of Freon-free refrigerators is the requirement of high cleanliness on the inner wall of the refrigeration tube, specifica...

Claims

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