Method of coating the inside surface of a hollow body

Details Method of coating the inside surface of a hollow body Method of coating the inside surface of a hollow body

1978-07-31

1979-08-07

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204 26, 204286, 204300EC, B01D 1302, C25B 1100, C25D 704, C25D 1314

Patent

active

041637038

ABSTRACT:
The method is particularly suitable for applying enamel by electrophoresis inside a hollow body, e.g. a sheet metal part. It consists in using an expandable cathode which, when expanded, approaches the interior angles of the hollow body, thereby favoring deposition of enamel in otherwise unfavored regions of the hollow body. Also, the expandable cathode is hollow and has a fluid flowing through it to drain off unwanted ions which could damage the enamel slip.

REFERENCES:
patent: 3922213 (1975-11-01), Smith et al.

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