Cleaning solution for metal surfaces

Metal-cleaning soln. comprises an aqs. soln. of an alkylene polyamine polyacetic acid chelating agent to which has been added 0.001-0.1% of a water soluble sulphide. The sulphide is capable of liberating sulphide ions. It is free from cations which are deposited on the metal surface. Prefd. compds....

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Bibliographische Detailangaben
1. Verfasser:	FRED NORMAN TEUMAC
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES CANDLES 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 DETERGENT COMPOSITIONS DETERGENTS DIFFUSION TREATMENT OF METALLIC MATERIAL FATTY ACIDS THEREFROM INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY RECOVERY OF GLYCEROL RESIN SOAPS SOAP OR SOAP-MAKING USE OF SINGLE SUBSTANCES AS DETERGENTS
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Beschreibung
Zusammenfassung:	Metal-cleaning soln. comprises an aqs. soln. of an alkylene polyamine polyacetic acid chelating agent to which has been added 0.001-0.1% of a water soluble sulphide. The sulphide is capable of liberating sulphide ions. It is free from cations which are deposited on the metal surface. Prefd. compds. are Na sulphide, K sulphide, NH4 sulphide, thioglycolic acid and dithioethanol. For removal of surface deposits (esp. Cu or Cu compds.) from ferrous metals, e.g. in boilers, cleaning action is accelerated and re-deposition of removed Cu is prevented.