Process for treatment of oxide films prior to chemical cleaning

Details Process for treatment of oxide films prior to chemical cleaning Process for treatment of oxide films prior to chemical cleaning

G - Physics

21

F

149/9

G21F 9/00 (2006.01) C23G 1/00 (2006.01) C23G 1/19 (2006.01) C23G 1/20 (2006.01)

Patent

CA 1223181

ABSTRACT OF THE DISCLOSURE A process is described for oxidizing pretreatment of chromium (III) oxide containing films, resulting from corrosion of base metal surfaces of piping systems and the like, to render the corrosion films more amenable to conventional chemical cleaning treatments. The process uses a dilute aqueous solution of an iron (VI) salt (FeO42-).

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