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!
  • Students Click Here

*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

Anodising Appearance Variation

Anodising Appearance Variation

Anodising Appearance Variation

Hi folks,

I'll keep it brief: I'd be very grateful for an opinion from some of you learned chaps on the cause of the variation in appearance of the attached. This isn't something we've encountered before.

Both of the aluminium parts shown (there are two, call them top and bottom) were supplied as 5083 tooling plate. Both of those parts have been bead-blasted and anodised in the same batch. The bottom is from 1" plate and the top is from 1.1/4" plate.

I doubt that the difference in appearance is accountable to the minor variations between the 1" and 1.1/4" plates (assuming they are both 5083).

And I've not seen that much of a variation in similar materials that have been anodised in the same batch before.

Which leads me to suspect that one of those parts is not the grade it's supposed to be? Thanks in advance.

Edit: we have several units of both of those parts, all of which have been anodised in different batches and all exhibit the same variation, i.e. tops look different to bottoms.

Best regards.

RE: Anodising Appearance Variation

The surface of the upper part looks like it may have been put in a vibratory tumbler before anodizing.

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


White Paper - How ESI is Helping Move New Medical Device Product to Market Quicker & More Cost Effic
Early Supplier Involvement has long been a strategy employed by manufacturers to produce innovative products. Now, it almost seems like a necessity. Because decisions made in the design phase can positively affect product quality and costs, this can help add value to OEM bottom lines. This white paper will discuss many facets of ESI, including why it’s so valuable today, what challenges limit the benefits of ESI, how cost is impacted, and more. Download Now
White Paper - Moving to a Driverless Future
This white paper describes what we see as the best practices to support a sustainable engineering process for autonomous vehicle design. It exposes how to use simulation and testing in common frameworks to enable design exploration, verification and validation for the development of autonomous cars at a system, software and full-vehicle level to drive a mature product development process for automated driving. Download Now
Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. 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