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In the conversion coating process, the metal surface of a part
is converted to a superficial layer containing a complex mixture
of chemical compounds. The chemical film is soft when freshly
formed, but once dried and aged, the film becomes more abrasive
resistant. Conversion coatings provide excellent corrosion
resistance.
We use Alodine®, Metalast®, and Iridite® brands of
chromium conversion coating chemicals, and we can provide clear
and gold coatings. Castings are one of our specialties, and military
certification is available on request.
Chromate Coatings
Paint, lacquer, and organic finishes bond exceedingly well to chromate
conversion coatings. In addition, the chromate coatings prevent
loss of pain adhesion due to under film corrosion.
Chromate conversion films vary in color depending on the chemical
being used and the base metal being coated. Colors range from clear,
to light iridescent, to gold. Greater corrosion protection is provided
with formulations that give a golden color, as these coatings tend
to be thicker. A variegated appearance may be obtained when the
base metal is non-uniform (i.e., welds in wrought materials and
castings).
METALAST TCP-HF is a trivalent chromium replacement for hexavalent
chromium based post treatments that meets or exceeds performance
requirements of current hexavalent products with no adverse environmental
impact.
Iridite 14-2 is a chemical process that produces a protective chromate
conversion film on aluminum and aluminum alloys. Application is
by dip, brush, swab, or spray, producing coatings ranging from
clear to dark yellow. The darker coatings providing the greatest
corrosion protection. The coating can be used as a final finish
or can be dyed various colors. It can also serve as a base for
paints and high performance top coats, lacquers, or as a base for
rubber bonding.
Non Chromate Coatings
ALODINE 5200 is a chromium free product specifically formulated
for treating non-ferrous metals. Spray or immersion applications
may be used. This process provides an excellent base for bonding
of adhesives and organic finishes.
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