The authoritative public forum
  for Metal Finishing since 1989
  

  -----

RoHS compliant Conversion Coatings

Gentlemen,

Would like your recommendation on RoHS Compliant Conversion Coatings.

I understand Titanium Alodine may be such a substitute, can you confirm, where can I get a data sheet.

Any other suggestions would be appreciated.

Thank You.

Art Willers
- Lumberton, New Jersey, USA
2005

---

Did you ever get the list that you were looking for?
I would like to see it myself.

Ken LaValley
- San Diego, California, USA
2005

---

Hi,

As much as I could understand, the RoHS directive is about hexavalent Chromium. The conversion coating solutions have hexavalent Chromium in them.
But the final product - the coated Aluminum - does not have hexavalent Chromium on it. The hexavalent Chromiun converts to trivalent Chromiun during the process.
So there is no problem with the RoHS directive.
You may have some problems with the local environment authority, where you make the coatings.

Thanks,

Yoram Fahima
MRV - Jerusalem, Israel
2005

What about Chromic Acid Anodize, Type 1? Is all the Hexavalent Chrome converted to Trivalent Chrome in this process too? If so, can you point me to your reference or source for this information?

Michael H. Williams
- Santa Maria, California, USA
2005