×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Surface finsh for anodizing

Surface finsh for anodizing

Surface finsh for anodizing

(OP)
I am working on a prototype product in aluminium 6082-T6. Machined cube about 4" with flat faces and rounded corners.

I wish to clear anodize and would like to achive a smooth, flat blemish free finish that wont show finger marks too badly.

What would be a good surface roughness to achive this? I am concerned about machine marks and blemishes caused by polishing.

Dont want to bead blast or linish.

Thanks

RE: Surface finsh for anodizing

By "finger marks" do you mean fingerprints resulting from skin residues left on the surface when the part is handled with bare hands? The oil of fresh fingerprints reflects light well, so they tend to catch your eye. Rather than a smooth surface texture, if you want to obscure fingerprints you should use a very rough surface texture. Something like diamond knurling on the cube surfaces would obscure fingerprints very well, since there would only be contact with skin at tips of the knurl points.

Clear anodizing produces a somewhat matte surface finish. But it won't obscure texture features of the base metal surface, such as machining marks, grit blasting or sanding scratches. If you want a smooth, uniform surface texture you might consider giving the part a vibratory tumble finish before anodize.

RE: Surface finsh for anodizing

My laptop has has a matte aluminum finish, which does extremely well at not revealing fingerprints.

TTFN
FAQ731-376: Eng-Tips.com Forum Policies
[IMG http://tinyurl.com/7ofakss]
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers


Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
There is a homework forum hosted by engineering.com: http://www.engineering.com/AskForum/aff/32.aspx

RE: Surface finsh for anodizing

(OP)
In my experience anodising anodizing gives variable results and I cannot give a specification for the effect I wish to achieve as there is a separation between machine shop and anodizing. To machine without marks can be expensive . I don’t know how smooth a surface is required. I am looking for a smooth and blemish free surface. Not highly polished.

Anybody know of a reference I can go to for anodized finish like RAL code painted colour? Only in this case there is an element of surface roughness , texture and visual appearance.

Trial and error seems to be only method available to me at the moment. I do not have my pick of vendors due to my geographical location.

The anodising shop can do some pre-treatment to obscure surface blemishes. Textured bead blasting which is not the effect I desire. Linishing with a sand belt produces a grain in the surface which is prone to finger marks and oil.

Polishing the surface seems to bring out machine marks. Perhaps a different grit size or polishing process should be used.

Perhaps some other process will produce the effect I want. I just don’t know because I cannot un-ambiguously define it.

RE: Surface finsh for anodizing

If you want to remove machining marks and leave a smooth surface with a uniform texture, then give the part a vibratory tumble finish with a suitable media.

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

eBook - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now
Research Report - Simulation-Driven Design for SOLIDWORKS Users
In this engineering.com research report, we discuss the rising role of simulation and the paradigm shift commonly called the democratization of simulation. In particular, we focus on how SOLIDWORKS users can take advantage of simulation-driven design through two analysis tools: SOLIDWORKS Simulation and 3DEXPERIENCE WORKS. Download Now
White Paper - Industry 4.0 and the Future of Engineering Education
With industries becoming more automated, more tech-driven and more complex, engineers need to keep their skills and knowledge up to date in order to stay on top of this wave—and to be prepared for the Industry 4.0 future. The University of Cincinnati offers two online Master of Engineering degree programs designed specifically for practicing engineers. Download Now
eBook - The Design Gridlock Manifesto
In this eBook, you’ll learn 6 ways old CAD technology slows your company down and hear how design teams have put those problems to rest. “The Design Gridlock Manifesto” shares first-hand modern CAD experiences from 15 companies around the world. 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