Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1982-09-14
1984-04-17
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
118DIG11, C25D 1314
Patent
active
044433123
ABSTRACT:
A method is disclosed for the in situ coating of electrically conductive structures such as a pipe line wherein a reservoir of a water dispersion of an ionic organic resin composition is provided at the section of the pipe or other structure to be coated and a direct current is impressed on the reservoir of resin and the conductive structure of a polarity to cause the resin ions to electrophoretically migrate to the conductive surface of the structure and form an insoluble coating thereon. The process allows coating of areas of the structure beyond the limits initially contacted by the resin composition by virtue of the fact that gas evolved from the water during electrolysis progressively displaces soil surrounding the structure allowing the resin to contact additional conductive surface portions of the structure and thus form a coating thereon.
REFERENCES:
patent: 3199585 (1963-03-01), Cronberger
patent: 3978015 (1976-08-01), Kolish et al.
patent: 4064028 (1977-12-01), Miyosawa et al.
Boggs Jr. B. J.
Midwest Research Institute
Niebling John F.
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