Tompkins phased in trivalent chromate plating, beginning in Fall 2006 in order to stay compliant with the European Union (RoHS) restrictions on the use of certain substances as well the documented recognition of hazards in handling hexavalent chromium by NIOSH. The substance of concern is hexavalent chrome used in zinc plating.
After January 2007, all parts shipped from our manufacturing facilities had trivalent chromate plating. Tompkins did not increase prices for trivalent chromate plating, and it did not require any change in assembly procedures or torque values. We have seen, in fact, improved corrosion resistance.
You can read the official press releases from 2006 concerning the changes in plating:
Download the Trivalent SDSTrivalent SDS
If you have any questions or concerns, please contact your account representative or our technical support at any time at 800-255-1008.