×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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

Sealed layer on type III hard anodize

Sealed layer on type III hard anodize

Sealed layer on type III hard anodize

(OP)
Hey all,

We have a shaft that gets a Type 3 class 2 hard ano with a nickel acetate seal. These shafts then get a grind/polish operation to bring them into diameter spec and surface finish spec (8-10 Ra micro in). I have a batch that has a tacky sensation on the surface, and is causing some noise in the assembly and I am correlating the noise to the tacky sensation. The question is if the grinding operation which removes up to 0.0003" per surface is removing enough material to get below the sealed layer, or if the seal was poor in the first place. Or, if there are any other causes for this type of tacky sensation that anyone is aware of.

Thanks!

RE: Sealed layer on type III hard anodize

Nickel Acetate seal does not cause any dimensional change - my understanding is that it essentially "fills in" the pores left by the anodizing process. Can you seal after polishing/grinding? Or eliminate the use of a seal at all (depending on your corrosion requirements)? There are also other options for sealing anodized coatings. Perhaps there is an interaction with the dye as well - could you use a class 1 non-dyed coating? I would check what type of wheel they are using to grind/polish the surface - I don't know what is proper for gridning/polishing this type of coating but perhaps some conversations between your grinding/polishing vendor and coating vendor would be in order.

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