Etching charge measurement system

Details Etching charge measurement system Etching charge measurement system

1986-02-24

1987-08-25

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204228, 204275, 356410, C25D 1700, C25F 302, C25F 700, G01N 2185

Patent

active

046891323

ABSTRACT:
An analyzer for acid-soluble aluminum in a steel sample precisely controls the etching charge by monitoring the etching current level and integrating the current with time. Once a predetermined charge is reached, the etching current is terminated. In a preferred embodiment, the etching cell is stacked above the mixing and developing chamber such that etching fluid flow is by gravity between these elements.

REFERENCES:
patent: 2744061 (1956-05-01), De Ford et al.
patent: 3189533 (1965-06-01), Anscherlik
patent: 4243326 (1981-01-01), Yee
patent: 4533642 (1985-08-01), Kelly

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