Method and apparatus for electrolytic etching of metals

Details Method and apparatus for electrolytic etching of metals Method and apparatus for electrolytic etching of metals

1991-08-14

1993-02-16

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204198, 204224M, 204226, 204237, 20412946, 204269, 2041415, C25F 100, C25F 302, C25F 700

Patent

active

051867966

ABSTRACT:
The internal quality of continuously cast and other steel samples in the form of ingots, billets, blooms, slabs and bars is determined in rapid manner to enable potentially problem-causing casting conditions to be identified and corrected in timely manner. A steel sample from the casting, after grinding to remove any heat-affected zone and to provide a desired degree of surface roughness, is anodically etched using dilute hydrochloric acid at ambient temperature to etch away metal from the surface to reveal the internal quality. After removal of the sample from the etching apparatus, the sample is washed, dried, and visually examined to determine the internal quality.

REFERENCES:
patent: 2745805 (1956-05-01), Jones, Jr.
patent: 3703458 (1972-11-01), Read et al.
patent: 4337134 (1982-06-01), Norman
patent: 4533642 (1985-08-01), Kelly
patent: 4718992 (1988-01-01), Funahashi et al.
patent: 5069760 (1991-12-01), Tsukamoto et al.

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