paint to cover stainless steel
paint to cover stainless steel
(OP)
Hi all!
We are about to start a project that includes outdoor AISI304 cabinets.
Our client want the cabinets painted.
Does anyone knows of any paint scheme adequate for stainless steel? Major issues: paint adehsion to the surface; corrosion resistance of coated stainless steel.
Regards
We are about to start a project that includes outdoor AISI304 cabinets.
Our client want the cabinets painted.
Does anyone knows of any paint scheme adequate for stainless steel? Major issues: paint adehsion to the surface; corrosion resistance of coated stainless steel.
Regards





RE: paint to cover stainless steel
Powder coating works well, just make sure the that the cabinet surface is cleaned well prior to appling the powder coat IAW manufacturer's instructions.
FYI if you use powder coating, this baked on at 400 F, so if you have gaskets or other things that are temperature sensitive, then you may not want to pursue this.
Tofflemire
RE: paint to cover stainless steel
Thank you for your input.
One thing that I have learned (can this be a tabu?) is that a stainless steel should not be isolated from the environment, so it can allways restore it's natural stainless coat. Can, the powder coating, prevent the stainless coat formation? Should this not be a problem?
Are you experienced in using this paint scheme on stainless steel?
Regards
RE: paint to cover stainless steel
We have use SS enclosures to house electronic equipment in outdoor environments; they do oxidize with a brown film on the surfaces, so I can see why your client would want the finish covered.
As for the experience, we have just supplied powder coated SS items to be used in the open ocean, these items will be exposed to salt spray, so long term effects have not be seen.
I do have to agree with you concern, we had another project where SS hardware was used in deep water, the hardware disintegrated due to the lack of oxygen in the water.
You may want to post in the paint/coatings forum on this web site.
Tofflemire
RE: paint to cover stainless steel
RE: paint to cover stainless steel
RE: paint to cover stainless steel
That's the best answer yet. My client was the Military who also requested these SS items be powder coated.
The only thing that I could add, the grade of SS specified was 304 which will still corrode.
Tofflemire
RE: paint to cover stainless steel
Tofflemire, you've said that you experienced problems in outdoor equipment. Have you done the SS passivation? We have experienced this kind of problems on non passivated SS components. But if you use your eqipment in very hard conditions (near the sea, for example) 304 is not the answer: you should use AISI316 (or 316L, if welded).
I've posted this subject in the paint/coatings forum as suggested.
Thank you for all your comments.
Regards
RE: paint to cover stainless steel
The Dimbulb might not be so dim - Per the ASM Int'l-MEI CorrosionCourse book "If one of two dissimilar metals are to be coated, the more noble or corrosion-resistant metal should be coated."
It has to do with cathode to anode area ratios.
An example is given of steel-sided tanks with stainless bottoms. The steel was painted & developed many pin-hole leaks/perforations @ the paint defects. Once they painted the stainless too, the problem was under control.
RE: paint to cover stainless steel
RE: paint to cover stainless steel
Re-read the original and my posts. What good does paint do when it is FLAKED OFF ON THE GROUND. Where does the orignal post mention galvanic corrosion?
RE: paint to cover stainless steel
S. Bush
www.water-eg.com
RE: paint to cover stainless steel
I have also painted St St heat exchangers that were found to corrode under insulation (chlorides and elevated temperatures in a warm environment). I think that a basic primer was used - it was a high temperature application so maybe not that basic - but it was something that I had used previously. I suggest approaching the painting contractors. In my experience they can provide the best knowledge - especially if they are going to warrant the painting.
RE: paint to cover stainless steel