Hex tor trivalent coating

[johnab]

There has been ongoing issue from Hex to Trivalent chrome conversion.

Just a few questions since I forgot the basics for coating.

Does Dacro coating always a hexavelent chrome?

What are the methods for hex to trivalenet chrome free -

Does geomet is an alternative for Hex to Trivalenet conversion?

 

[CoryPad]

Dacro coating does not always contain hexavalent chromium.

The method of converting is simple. Use trivalent starting materials instead of hexavalent starting materials.

Geomet is hexavalent chromium free, so it is a natural choice. Magni and D[ö]rken offer competing coatings with equal performance.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[johnab]

what exactly the dacro is? Can you explain in brief the hex & tri coating?

 

[TVP]

Visit the following websites for more information on the specific coatings from Metal Coatings International:

http://www.dacromet.com/

http://www.geomet.net/