Electrodeposition coating composition and method

Details Electrodeposition coating composition and method Electrodeposition coating composition and method

1990-10-23

1994-01-04

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041816, 2041817, C25D 1300

Patent

active

052757072

ABSTRACT:
A method of coating a metal article by forming a first electrodeposition coating layer having varistor properties on a metal article by an electrodeposition coating method by use of an electrodeposition coating film-forming composition containing from 7 to 50 parts by weight of an electrically semiconductive substance per 100 parts by weight of the solid content of the composition, and then forming a second electrodeposition coating layer on said first electrodeposition coating layer by an electrodeposition coating method by use of an anionic or cationic electrodeposition paint while applying a voltage exceeding the varistor voltage. The coating composition thus-produced has excellent varistor properties with superior corrosion resistance.

REFERENCES:
patent: 4500399 (1985-02-01), Hart et al.

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