Method for electrolytic etching

Details Method for electrolytic etching Method for electrolytic etching

1979-02-21

1981-01-27

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412965, C25F 302, C25F 314

Patent

active

042473772

ABSTRACT:
A method for electrolytically etching metals. Nickel superalloys are etched with uniform grooves using a 10 volume percent HCl aqueous solution and periodically reversed current. An aperture containing shield is interposed between an upward facing workpiece and an electrode. The shield is adapted to divert gases evolved at the workpiece from passage to electrode. Controlled roughness in an etched surface is produced by varying electrolyte temperature. Preferred smooth finish is obtained at 7.degree. C.

REFERENCES:
patent: 3331760 (1967-07-01), Powell
patent: 3477929 (1969-11-01), Namikata et al.
patent: 3749653 (1973-07-01), Trzyna et al.
patent: 3905885 (1975-09-01), Bengel, et al.
patent: 3975245 (1976-08-01), Bergauist

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