Aluminum Chromate Coating process is creating a thin surface over aluminum and aluminum alloys to increase corrosion resistance, keep electrical conductivity, increase adhesion over surfaces to be painted and to add a decorative look. This process is also called Aluminum Chemical Conversion Coating and/or Alodine Coating. Coating can be done from dark yellow to light yellow, light yellow to transparent according to the type and class. Cr+6 and non-Cr+6 containing solutions are available. Applications are made according to the customer needs.
Aluminum Chromate containing Cr +6 ``Yellow Alodine``
Changes according to required type and class requirements. Coating performance is calculated by Surface Appearance, Coating Weight, Paint Adhesion, Wet Adhesion, Electrical Contact Resistance and Corrosion Resistance Test.
MIL-C-5541, MIL-DTL-5541, ASTM B449-93 (These are the main international standards, it can also be customer standards as well.)
Aluminum Chromate not containing Cr +6 ``Transparent, White Alodine``
EST Surface Treatment offers +3 valence Chromate Process (TCP) which complies with the Restrictions on Hazardous Substance and Waste Electrical and Electronic Equipment Directive. This coating doesn’t contain +6 valence chromes and fully complies the MIL-DTL-5541 standards. (For all aluminum alloys except 2000 series) Coating is light in color and contains little bit of blue hue. Note: Curing time is 24 hours.
- Advanced corrosion resistance
- Advanced adhesion ability
- Electrical conductivity
- Eco friendly