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Method for cleaning and passivating a metal surfaceA cleaning solvent useful in the cleaning of metal surfaces, e.g. nickle-iron alloys, contains sulfamic acid, citric acid, a solvent for hydrocarbon residues, and a surfactant. Metal surfaces are cleaned by contacting the surface with the cleaning solvent and then passivated by contact with aqueous solutions of citric acid or sodium nitrite or a combination of the two.
Document ID
20080006888
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Alexander, George B.
Carpenter, Norman F.
Date Acquired
August 24, 2013
Publication Date
May 18, 1976
Subject Category
Metals And Metallic Materials
Report/Patent Number
Patent Application Number: US-PATENT-APPL-SN-475704
Patent Number: US-PATENT-3,957,529
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-3,957,529
Patent Application
US-PATENT-APPL-SN-475704

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