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Electrophoretic Coatings

Electrophoretic Coatings
It can be called electro coating, e-coating, autophoretic coating, catophoretic painting, and probably a few other things. In any case the parts are immersed in solution in an electrified tank containing the paint. It is drawn to the parts, where the addition or subtractions of electrons change the paint from ions in solution to solid particles adhering to the parts in a manner analogous to electroplating of metals.

The coatings cover every nook and cranny because as the high spots become electro coated, they become insulated and divert the current to the low spots. Also the coatings are extremely thin.

The electrophoretic surface coating process provides the user with the following economical, technical and environmental benefits:
  • Automated plant - low labour costs.
  • Much better consistency in coating thickness as compared to powder coating
  • No wastage - almost 100% transfer efficiency.
  • Consistent, controllable film thickness, even on sharp edges and in awkward recesses.
  • Smooth films - no runs or sags.
  • Water based process - only small amount of low volatility solvent required.
  • Low toxicity.
  • Minimal effluent.
  • Low temperature/time stoving schedules and upon its corrosion resistance (eg Al-Cu alloys) will give a useful measure of protection.
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