H&W offers two alternatives for chemfilm, or aluminum conversion coating chromate and non-chromate (RoHS-compliant). Both produce no measurable build-up and provide terrific corrosion resistance. Thickness of the film can range from 0.000001 to 0.000004 inches based on the time, temperature, and concentration of the prepared solution. The coatings are conductive with the electrical resistance increasing with heavier coatings. The chromate conversion coating option is known for superior bonding in paint and adhesive applications.
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