Solutions to paint corroded steel still wet
Solutions to paint corroded steel still wet
(OP)
Hy, my problem is the following :
We run a paper machine and the wet end structure (steel )of the machine is starting to rust. The original paint is damage on some areas and the rust has installed itself. The damage areas are continuously operating in a wet, warm (60 C) and corrosive conditions.
My question is : Since we shut the machine dowm every 6 weeks for 12 hours, is there a way of repainting the structure in those type of shut down ? We cannot sandblast the area since it wiould requied a longer shut than we have.
Is there a type of product or paint that can do this job ?
Thanks
We run a paper machine and the wet end structure (steel )of the machine is starting to rust. The original paint is damage on some areas and the rust has installed itself. The damage areas are continuously operating in a wet, warm (60 C) and corrosive conditions.
My question is : Since we shut the machine dowm every 6 weeks for 12 hours, is there a way of repainting the structure in those type of shut down ? We cannot sandblast the area since it wiould requied a longer shut than we have.
Is there a type of product or paint that can do this job ?
Thanks





RE: Solutions to paint corroded steel still wet
htt
An appropiate top coat is still required.
RE: Solutions to paint corroded steel still wet
You might try looking at some marine coatings (for boats).
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RE: Solutions to paint corroded steel still wet
Luis
RE: Solutions to paint corroded steel still wet
http://www.por15.com/ - this is also good stuff too. Easily meets the temperature constraint. I think it's actually a polyurethane. I think it might be able to meet the wetness/corrosive constraints as well.
RE: Solutions to paint corroded steel still wet
I first tried one almost 10 years ago when we were unable to control the constant formation of consdensate. The coating (Euronavy ES 301, I believe) worked very well. There are other brands with similar properties, but I've no personal experience.
All in all, though, you cannot over-emphasize the importance of surface preparation. A clean surface is paramount.
RE: Solutions to paint corroded steel still wet
Pressure wash the area to be painted. Use needle guns to clean the surface (soda blast, and dry ice are not as effective per our testing). Dry just the area to be painted, use plastic sheeting to keep water from dripping onto the area. Check for the presence of salts (e.g. chlorides in your application) using a test like Chlor test by Chlor Rid.
Use a good epoxy coating that is suitable for marginally prepared surfaces and is suitable for splash and spill. Test several different materials in the same area to benchmark thier performances against one another. Use these comparisons to determine which mfg to choose during future field days.