In the process of chromate conversion on Houston, the metal surface of a piece is converted to a superficial layer that contains a complex mix of chromium compounds. The chromate film will be soft when freshly formed, but when gets dried and aged, the film becomes more rough resistant. These coatings provide an excellent corrosion resistance. Paint, organic finishes and lacquer bond very well into chromate conversion coatings. In addition, the coatings prevent loss of plain adhesion owing to underfilm corrosion.

Conversion films might vary in color depending upon the chemicals that are being used and the foundation metal being coated. Colors often range from clear, to light iridescent, to gold. Better corrosion protection is provided with formulations that give golden color, as these films tend to be thicker. A multicolored appearance may be attained when the base metal is non-uniform (i.e., welds in shaped materials and castings).

Benefits of Chromate Conversion