System for controlling the composition of chemical treatment bat

Details System for controlling the composition of chemical treatment bat System for controlling the composition of chemical treatment bat

1981-05-11

1983-02-22

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 627, 118689, 118690, 118697, 118676, 427345, C23F 502

Patent

active

043746810

ABSTRACT:
An apparatus having an article counter, a set-point register and a comparator, and at least one electrode for detecting solution pH, with a controlled system adapted to add pre-selected amounts of replenishing solution to the cleaning and treating baths controlled by the system when indicated by coincidence between the number in the pre-set counter and the number in the article counter, in response to system pH, whereby the solutions being replenished will retain predetermined characteristics throughout an extended operating life. A method which comprises sampling solution pH counting the articles being treated and replenishing treatments and cleaning solutions in response to article count and pH or other solution condition from time to time to maintain desired process characteristics.

REFERENCES:
patent: 3369928 (1968-02-01), Avlow
patent: 3515094 (1970-06-01), McVey
patent: 3607453 (1971-09-01), Engesser et al.
patent: 4233087 (1980-11-01), Cooke

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