Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-06-10
1997-11-18
Hertzog, Ardith
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510255, 510270, 510271, 510421, 510508, 134 3, 134 41, C11D 166, C11D 708, C11D 750
Patent
active
056887558
ABSTRACT:
An acidic cleaning aqueous solution for carrying out a low temperature acidic cleaning of aluminum and aluminum alloy and a cleaning method for the same free from harmful fluorine and chromium ions. The acidic cleaning aqueous solution includes oxidized metal ions as an etching promoter, an inorganic acid, a surfactant and a certain amount of polyhydric alcohols having at least two hydroxyl groups directly coupled with two adjacent carbon atoms of a principal chain within one molecule and further includes an oxidizing agent for oxidizing the oxidized metal ions reduced in the cleaning. Certain alcohols in the acidic cleaning aqueous solution can control the oxidative decomposition reaction of the surfactant to obtain a long life acidic cleaning aqueous solution.
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Ikeda Satoshi
Kamimura Masayuki
Delcotto Gregory R.
Hertzog Ardith
Nippon Paint Co. Ltd.
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