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Chemical cleaning process for metall workpieces
Chemical cleaning process for metall workpieces
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机译:金属工件的化学清洗工艺
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摘要
The cleaning process is usable especially for washing the outer faces of steam generator tubes. The surface metal oxides are removed by a complexing operation (which may be preceded by a reduction) and then dissolving of the siliceous compounds is effected by a reaction with electrophilic compounds in aqueous insertion medium or a reaction with alcohols or amines in aqueous condensation medium, the reaction being intended to weaken the bonds, in a medium ensuring the complexing of Si(OH)4.
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