1 reply to this topic

[keverne]

Dear All,

I have this case where a distilled coconut fatty acid (DCFA) B1210 manufacturer claimed that the threaded region of the metal drum closure (pre-coated mild steel flange) was not properly coated with the protective coating layer (IP2088) hence cause their product to turn into brown residue on the the drum closure area when in contact with the exposed surface of mild steel. They alleged the brown residue formation was due to a reaction between their product and the mild steel of the flange. Is this phenomenone possible?

Thank you very much!

[PurduePete]

Actually, this sounds about right. I spent some time working for a fatty acid manufaturer, and we had many corrosion issues with carbon steel and in some cases even 304 SS tanks. We got to the point where, in fatty acid service, everything was 316L SS or higher metallurgy.