Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Need aluminum coating that is ROHS compliant

Need aluminum coating that is ROHS compliant

Need aluminum coating that is ROHS compliant

We have a chassis that currently has aluminum sides with a clear iridite finish. We've been told that this finish can no longer be used in order to comply with the Restriction of Hazardous Substance (ROHS)directive in Europe. This directive says that any new electrical and electronic equipment must not contain lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBBs) or polybrominated diphenyl ethers (PBDEs). The coating we use needs to be conductive for EMI reasons and fairly durable. Clear is preferred for aesthetic reasons. Any suggestions on an alternate coating?

RE: Need aluminum coating that is ROHS compliant

Henkel makes some Alodine conversion coatings that are chrome free. North American phone is (800) 521-6895. They also have a website that is not particularily useful.

RE: Need aluminum coating that is ROHS compliant

I found the answer to my question. Trivalent chromium. This is currently offered by Metalast under the name TCP-HF.

RE: Need aluminum coating that is ROHS compliant

Thanks for following up and sharing the wealth.

RE: Need aluminum coating that is ROHS compliant

If you are looking for corrosion protection, Trivalent is not as good as Hexavalent.  I've been researching alternatives to Chromic Acid Anodize, Type 1 for 7075-T6 aluminum parts and everything so far points to compromises when you switch.  Anyways, I would not limit myself to Trivalent alone.  There are alot of companies out there coming up with new (proprietary) coatings to get around RoHS...

RE: Need aluminum coating that is ROHS compliant

Also, check out this thread in Eng-Tips.  It may have some bearing for you:

Conductive coating on aluminium?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close