It still will have Hex Chrome.Ĥ I have not heard much about the Type IV finishes. Type III (colorless) generally refers to Hex Chrome that has been bleached off to give a clear look. A Blue with pale yellow is the best replacement for yellow as of now.ģ Do all ASTM B633 Type III platings NOT use Hexavalent Chromium?Īns: No it does not imply that. You can get the same finish only for blue and black hex chrome with tri substitutes, but not for yellow or olive as of yet. It definitely implies Hex Chrome.Ģ Can you get a type II finish that uses Trivalent?Īns: Trivalent chromates give paler and lighter finishes some use metals, some use permanganates, some use dyes, in order to replicate the Hex finish. ASTM B 633 and all other worldwide standards were written around the time when no one spoke about trivalent. In response to your questions re ASTM B 633 I have an old version of the spec so my opinions are based upon the one I have.ġ Do all ASTM B633 Type II platings use Hexavalent Chromium?Īns: The answer is Yes. My compliments for an excellent round of questions!
0 Comments
Leave a Reply. |