Before trivalent chromium (CR(III)) became a prevalent pretreatment for aluminum surface finishing, there was CR(VI), or hexavalent chromium. Both of these compounds contain chromium, but in different stages of oxidation.
Hexavalent chromium soon became a problem as it became a known carcinogen and a priority pollutant that was soon after restricted. Because of this, a great deal of research and effort was put into finding alternatives that were as effective against environmental corrosion but also better for the environment.
As many companies have noticed around the world, more and more people are caring about the environment every day, so this change was important — both from the standpoint of selling and environmental consciousness.
After this, NAVAIR, or Naval Air Systems Command, developed ways to use trivalent chromium, or TCP to use on aluminum alloys. The results turned out to be exceedingly positive.
Since the rise of TCP, experiments have been conducted to reassure that it has no residual Cr(VI), which it does not. The linked experiment showed that in normal environments, no sign of hexavalent chromium appeared, which serves as a great advantage to trivalent chromium.
Switching to trivalent chromium benefits you and your products with:
- High resistance to environmental corrosion
- Environmentally safe materials
- More safety for those handling it
Trivalent chromium has proved itself to be the superior pretreatment process for aluminum alloys. It’s not only ideal for military uses, but also for coated products across the board. Military-grade products typically use TCP processes because of the strength and flexibility of the material, but its uses are good for products of all uses and purposes.
Production Paint Finishers use trivalent chromium on their products to keep their coatings safe and strong. They want the best for you, too. They’ll work for you to get the best out of your product with a quick and efficient turnaround.
If you’re looking for someone to coat and finish your part(s), request a quote from us to learn more!.