Pickling process in an acid bath of metallic products containing

Details Pickling process in an acid bath of metallic products containing Pickling process in an acid bath of metallic products containing

1992-11-18

1994-08-16

Breneman, R. Bruce

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 41, C23G 102

Patent

active

053383672

ABSTRACT:
Pickling process in an acid bath containing an oxidant in order to enhance the pickling kinetics, wherein at least one peroxygenated derivative of titanium or at least of one element of the titanium family included in the product to be pickled is formed, the metal being ionized to a higher valency, the formation of the peroxygenated compound is controlled by measurement of the redox potential, and the quantity of oxidizing agent is limited so as to maintain an oxido-reduction potential lower than the passivation potential of the metallic product.

REFERENCES:
patent: 2942954 (1960-06-01), Thomas
patent: 3258429 (1966-06-01), Weed
patent: 3463733 (1969-08-01), Achenbach
patent: 4902472 (1990-02-01), Isobe et al.
Patent Abstracts of Japan, vol. 11, No. 322 (C-453), Oct. 20, 1987, & JP-A-62 109 998.
Chemical Abstracts, vol. 107, No. 26, Dec. 28, 1987, p. 82, Resume No. 241263w, Columbus, Ohio, US; & JP-A-62 077 489 (Nippon Mining) Sep. 4, 1987.

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