Chromate Trivalent and Hexavalent
Hexavalent chromium plating, also known as hex-chrome, Cr6+, and chrome (VI) plating, uses chromium trioxide (also known as chromic anhydride) as the main ingredient. Hexavalent chromium plating solution is used for decorative and hard plating, along with bright dipping of copper alloys, chromic acid anodizing, and chromate conversion coating.[1]
Hexavalent ; Mil-DTL-81706B Type 1 Class 1A Form 2 Method C
Mil-DTL- 81706B Type 1 Class 3 Form 2 Method C
Trivalent chromium is another method of decorative chrome plating, and is considered the environmentally friendly alternative to hexavalent chromium, with many of the same characteristics; just like hexavalent chrome finishes, trivalent chrome finishes provide scratch and corrosion resistance and are available in a variety of color options. Trivalent chromium plating uses chromium sulfate or chromium chloride as its main ingredient, instead of chromium trioxide; making trivalent chromium less toxic than hexavalent chromium.
Trivalent Chromate; Mil-DLT-81706 and Mil 5541
