Trivalent Chromates

Trivalent Chromates Finishes for Zinc

Today’s zinc chromates processes are moving forward with zinc trivalent chromates to meet European Union initiatives End of Life Vehicles (ELV) (http://en.wikipedia.org/wiki/End_of_Life_Vehicles_Directive) and restriction of the use of certain hazardous substances in electric and electronic equipment (RoHS). To learn more go to this link (http://en.wikipedia.org/wiki/Restriction_of_Hazardous_Substances_Directive).

EPi has a complete line of trivalent yellow chromate and trivalent blue chromate processes for zinc plated, zinc diecast and zinc galvanized processes.

Call 1-262-786-9330 to order a sample of our metal chromate finishes. Send sample parts for chromate finishing or need more information? Use our online request form.

Want to find our more about EPi’s chromates? Visit our chromate FAQ page. Read technical papers about new discoveries with trivalent chromates, presented at Sur/Fin 2008 (NASF – National Association of Surface Finishing Conference).

These trivalent chromates offer the following advantages:

• Ultra high corrosion protection (see table below)

Trivalent Corrosion Table

All tests performed on acid chloride zinc plating process 0.3 mls on 4″ × 6″ Q-panels using ASTM B-117.

• Baking for hydrogen embrittlement results in no loss of corrosion like hexavalent chromates
• Service as an excellent base for paints and rubber banding
• EPi trivalents do not fade easily in the sun (UV resistance)
• Does not wipe off with your thumb
• Scratch resistance/white creeping corrosion

Do you still need to use hexavalent chromates? EPi has a complete line. Click here to learn more. Want to find out more about EPi’s chromates? Visit our Trivalent Chromate FAQ page.