×
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

Corrosive Protection Paint on Galvanized Sheet

thread116-485500

Corrosive Protection Paint on Galvanized Sheet

Corrosive Protection Paint on Galvanized Sheet

(OP)
Hi,
We are requested to paint (Primer 150 micron + Top coat 75 micron) on the pre-galvanized sheet metal(G60)0.85 mm.
Question is that which type of surface preparation shall be done prior painting since the sheet metal is only 0.85 mm.
Thanks

RE: Corrosive Protection Paint on Galvanized Sheet

Hi,
To me very weird question , Galvanized sheets are self protective against corrosion . This means that your client is going to loose the benefit of the galvanization (money thrown away) .
Remove the galvanization and apply the paint .

Pierre

RE: Corrosive Protection Paint on Galvanized Sheet

With galvanising steel, the coating has to be compatible with HDG. With some coatings, a zinc saponification occurs and the coating will not adhere for any length of time. I often spec safety yellow coating for HDG bollards or crane beams...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Corrosive Protection Paint on Galvanized Sheet

(OP)
Pierreick,
Thanks for your reply, we got shock for this request from client. They said, they prefer paint rater than pre-galvanized sheet metal.

@Dik,
If HDG, the surface may not be very smooth and there may be a way to paint. Now is pre-galvanized sheet for ventilation duct and we are having a challenge with that.

RE: Corrosive Protection Paint on Galvanized Sheet

It has nothing to do with the roughness... some coatings do not work well with HDG... make sure your top coat can be used with HDG.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

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