Method and apparatus for descaling stainless steel

Details Method and apparatus for descaling stainless steel Method and apparatus for descaling stainless steel

1989-10-26

1991-02-19

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204209, 204210, C25F 106, C25D 1700

Patent

active

049941577

ABSTRACT:
A method of descaling stainless steel which provides a smooth and glossy surface, comprises the steps of (a) anode-electrolyzing stainless steel having scales thereon in an aqueous neutral salt solution, (b) anode-electrolyzing or immersing the stainless steel in an aqueous alkaline solution. Steps (a) and (b) are performed in the order of either (a), (b), (a). The method further comprises the step of cathode-electrolyzing the stainless steel treated in the previous two steps in an aqueous nitric acid solution or immersing it in an aqueous solution of a mixture containing nitric acid and fluoric acid.

REFERENCES:
patent: 3254011 (1966-05-01), Zaremski
patent: 4021299 (1977-03-01), Zaremski et al.
patent: 4711707 (1987-12-01), Kikuchi et al.

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