×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

MIL spec metal treatments

thread332-412309

MIL spec metal treatments

MIL spec metal treatments

(OP)
Hi guys, I got a part here for a hydraulic system on a Military vehicle, specifically a demister. it has what I believe to be a MIL spec coating on it. Its a dark brown/green color and is somewhat glossy. its definitely not paint either. I'll post a picture of it as soon as I can so you can get a better idea. any suggestions on what the coating may be? Thanks guys

RE: MIL spec metal treatments

(OP)
NO IDEAS?

RE: MIL spec metal treatments

Is the base material steel?

I would guess electroplated zinc plus chromate conversion coating.

RE: MIL spec metal treatments

I agree with Cory, likely zinc plating with chromate conversion coating. Chromate baths based on chromic acid (hexavalent Cr) can produce a thicker olive drab or brown color with longer immersion times.

RE: MIL spec metal treatments

The joints at the base of the barbed fittings and around the lower end cap look like they are brazed connections. While the joint around the upper circumference of the cap is clearly a fusion weld performed before the coating was applied.

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

Resources

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