Electrocleaning process

Details Electrocleaning process Electrocleaning process

1976-06-07

1977-08-02

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204 32R, 204146, C25F 100, C25F 500

Patent

active

040394107

ABSTRACT:
A process for electrocleaning articles comprised of a substrate having a copper coating thereover to remove adherent and embedded contaminating carbon particles from the coating, rendering the article in suitable condition for further electroplating operations. The electrocleaning treatment includes immersing the article in an aqueous alkaline solution containing a controlled effective amount of an inorganic complexing agent possessed of copper solubilizing properties and effective to retain the solubilized copper in solution in the form of a complex. The article is cathodically electrified continuously or on an intermittent basis for at least a portion of the period while immersed in the aqueous alkaline solution to accelerate the solubilization of the copper and the dislodgment and removal of the contaminating carbon particles, whereafter the electrocleaned article is rinsed.

REFERENCES:
patent: 1917022 (1933-07-01), Dunn
patent: 2422902 (1947-06-01), Huston
patent: 3528896 (1970-09-01), Davidoff et al.
patent: 3627654 (1971-12-01), Petit
patent: 3663386 (1972-05-01), Otrhalek

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