Method of cleaning steel surfaces

Metal surfaces contaminated with phosphates are cleaned with an aqueous alkaline solution of a gluconic sequestering agent 4 to 15 g./l., a polyethylene glycol surface active agent 0.1 to 8 g./l., an alkali metal, e.g. sodium potassium, lithium, cesium or rubidium hydroxide 40 to 200 g./l., and an o...

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Bibliographische Detailangaben
Hauptverfasser:	DELL GAILLARD W, GOODSPEED EDWIN W
Format:	Patent
Sprache:	eng
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 surfaces contaminated with phosphates are cleaned with an aqueous alkaline solution of a gluconic sequestering agent 4 to 15 g./l., a polyethylene glycol surface active agent 0.1 to 8 g./l., an alkali metal, e.g. sodium potassium, lithium, cesium or rubidium hydroxide 40 to 200 g./l., and an oxidizing agent 0.05 to 0.5 g./l. The composition may be prepared in solid form. Anti-foaming agents may be added. The oxidizing agent may be a sodium salt of a permanganate, molybdate, perbcrate, peroxide, chlorate, bromate, iodate, perchlorate, nitrate, hypochlorite, chromate and bichromate, sodium m-nitrobenzene sulphonate or chromic, picric, ortho-nitrochloro benzene-p-sulphonic or m-nitrobenzoic acid. The gluconic sequestering agent may be gluconic acid, sodium gluconate, glucono-deltalactone or materials which form these compounds in situ.ALSO:Metal surfaces contaminated with phosphates are cleaned with an aqueous alkaline solution of a gluconic sequestering agent 4 to 15 g.l., a polyethylene glycol surface active agent 0.1 to 8 g.l., an alkali metal, e.g. sodium potassium, lithium, cesium or rubidium hydroxide 40 to 200 g.l., and an oxidizing agent 0.05 to 0.5 g.l. The composition may be prepared in solid form. Anti-foaming agents may be added. The oxidizing agent may be a sodium salt of a permanganate, molybdate, perborate, peroxide, chlorate, bromate, iodate, perchlorate, nitrate, hypochlorite, chromate and bichromate, sodium m-nitrobenzene sulphonate or chromic, picric, ortho-nitrochloro benzene p-sulphonic or m-nitrobenzoic acid. The gluconic sequestering agent may be gluconic acid, sodium gluconate, glucono-delta-lactone or materials which form these compounds in-situ.