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Trivalent Chromium Plating

Hi,

Since we are planning to go for trivalent chromium plating from existing hexavalent chromium plating, I require your valuable suggestions.

1. Process wise different from hexavalent chromium plating
2. Quality wise different from hexavalent chromium plating

please help me how can we start to gather informations.

thanks in advance

V. Ranga Bhuvana Balaji
engine valves - Hyderabad
2006

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2006

Since you make valves, I assume that it is for wear resistance on the stems. If so, I have my doubts, as trivalent chrome is thin, or very thin when compared to hard chrome.
I should certainly have a few plated and then run in a test engine to see if they will last. It is not cheap to switch from hex to tri and vice versa. The extreme cost would be if you had to replace product a year from now.
If it done to a OEM spec, then you should be fine. Go with a vendor that will provide initial set up guidance and ongoing technical service. It is cheaper to do that for a couple of years, till you really know the system, its faults and the fixes.

James Watts
- Navarre, Florida

Try www.uspto.gov webpages-there you can find some very good and download free infos on that subject(1976.-2006. full text patents database).Good luck!

Goran Budija
- Cerovski vrh Croatia
2006