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Coating for Rusted Steel

I am looking for a suitable coating for structural steel that has sustained some corrosion damage. The environment is indoors, but is very humid with some salts in the humid air - roughly equivalent to a sheltered warm marine environment.

Some of the areas to be coated have limited access making surface preparation difficult. I expect that we will only be able to remove the loose corrosion deposits. The area also has some "environmental" restrictions that will dictate low solvent emissions.

Any suggestions or recommendations will be appreciated.

Larry Hanke
Minneapolis, Minnesota
1998

Try an acid etch primer from someone like Sherwin-Williams Indistrial paints.

Ward Barcafer, CEF
aerospace - Wichita, Kansas
1998

Have you considered blasting with a suitable fine grained media, just the way paint is removed sometimes? This could address your environmental concerns.

Mandar Sunthankar
- Fort Collins, Colorado
1998

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Try a rust converting primer, if feasible. This can be an excellent base for architectural repainting. As for the choice of paint, I suggest an epoxy to protect the area from the humid environment.

  
Craig Burkart
- Naperville, Illinois
1998

There are waterbased rust converter ⇦ on eBay or Amazon [affil link] s available to industry and individuals. I am familiar with the Neutra Rust line (I sell it). The surface to be coated needs to be oil and grease free and loose scale removed (pressuire washing usually will accomplish this) When completed and still wet you spray apply NR661 onto the surface to a WFT of 3 mils Allow to cure for 12 hrs and then apply Neutra rust TL Barrier in two coats achieving a dry film thickness of 7 mils. No rust for at least 5 years

Mike Lax
- Teaneck, New Jersey
1999

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