Home /
Search 🔍
the Site

World's #1 finishing resource since 1989
No login needed: Chime right in

topic 1641

Looking for low cost, low performance anti-corrosion coating for steel


Our company currently manufactures metal stampings for the automotive industry. In one of our product lines, an expandable seal is heat bonded to the stamping before it is shipped to the customer. Currently we have to use galvanized steel in order to keep the part from rusting until it is placed in the vehicle. Once it is assembled into the car and goes through the e-coating process, rust is no longer an issue. Also, the process of heat bonding the seal to our stamping has always been a challenge to control in production and is in need of improvement. We feel that our stampings could be much more competitive if we could find a low cost rust preventative coating that could be applied to the steel right at our stamping presses that would also aid in the adhesion of the seal to our stamping. If you have any suggestions or can point me in the right direction, it would be greatly appreciated. Thank you.

Steve Porter
manufacturing - Almont, Michigan, USA

A coating that would be simple and mildly corrosion resistant and likely to be compatible with the e-coat process would be phosphatizing. You could do anything from a simple 3-stage iron phosphate (clean-phos, rinse, rinse) if your needs truly are minimal, through a more thorough 5-stage iron phosphatizing, or even 7-stage zinc phosphatizing followed by oiling.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


I would vote for a fine crystal zinc phosphate run on a smaller to medium barrel phosphate line. Would consider a chrome seal if compatible. A non chrome seal would simplify the waste treatment if it was compatible. Oil , IF any, would have to be done after the bonding and would have to be compatible with the expandable seal and the adhesive.

James Watts
- Navarre, Florida


We suggest you try our Rusteco Gel. Spray apply to the metal and washes off when not needed any more. Also acts as primer and provides excellent adhesion to any coating.

Michael H. Nahm


Have you considered using copper coated steel?

Larry Martin
- Salt Lake City, Utah

finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

Chemicals &
Consult'g, Train'g
& Software

About/Contact    -    Privacy Policy    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA