STUDY ON ELECTRIC CONDUCTIVE GRAPHITE-ACRYLIC ACID COATING

Expanded graphite worm was used as the filler in the coating of acrylic acid varnish binder, its electric conductivity was tested, and the relationship of coating thickness, composition and temperature with resistivity was investigated. Results show that the new coating has different performance of resistivity compared with conventional powder filling coating. The bulk resistivity is one order of magnitube lower than that of the powder filling coating, reaching about 0.02 Ω·cm, which is nearly independent of the amount of the worm. The coating is an excellent material for static shield and electrostatic conductivity. The value of static shield reaches above 40 dB, and the heating power of the paint in water is about 7 W/cm 2.