Protection of zinc against descaling acids - using cinnamic or capric acids with benzylquinolinium chloride

A corrosion inhibitor, for protection of Zn and Zn-coated iron against attack by descaling acids, contains a mixt. of benzylquinolinium chloride and a carboxylic acid, pref. a 5-18C aliphatic carboxylic acid, esp. capric and/or a phenylalkane acid with a 2-5C alkane or alkene gp., pref. hydrocinnami...

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Bibliographic Details
Main Author BOEHM,WALTER,.DR
Format Patent
LanguageEnglish
German
Published 08.08.1974
Subjects
CHEMICAL SURFACE TREATMENT
CHEMISTRY
CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS
COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
COATING MATERIAL WITH METALLIC MATERIAL
COATING METALLIC MATERIAL
DIFFUSION TREATMENT OF METALLIC MATERIAL
INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL
METALLURGY
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Summary:A corrosion inhibitor, for protection of Zn and Zn-coated iron against attack by descaling acids, contains a mixt. of benzylquinolinium chloride and a carboxylic acid, pref. a 5-18C aliphatic carboxylic acid, esp. capric and/or a phenylalkane acid with a 2-5C alkane or alkene gp., pref. hydrocinnamic- or cinnamic acid. The descaling acid may be aminosulphonic acid, and 0.5-10% of the mixed inhibitors are added. The addn. of capric-, cinnamic- and/or hydrocinnamic acid to the benzylquinolinium chloride prevents the descaling acid attacking the Zn.
Bibliography:Application Number: DE19742405861