Anybody has any experience with trying to remove cosmoline from the inside of a new tank? I have three new tanks, 2 x 15bbl FV and 1 x 15bbl BBT, all from the same manufacturer that I cannot get clean. The tanks are American made and brand new. There is a greyish film on the inside of the tanks that will not come out, no matter what I try. This stuff is on the sidewall, cone, manway, etc. This picture shows what it looks like on a white paper towel immediately after a cycle. My chemical company says its something called cosmoline, a rust inhibitor, and is applied after the formation of the steel to protect it.
First of all, I use Wesmar Chemical for all of my chemicals and followed their directions exactly. I have not had this problem with any of the 10 tanks that I have or my BK,MT, or HLT. My initial cleaning on the new tanks was with liquid excel caustic followed by a 40% by volume nitric-phosophoric acid passivation cycle.
I have run the caustic/acid cycle three times, used a degreaser called Lift Off SGF, purple degreaser from Home Depot, a mixture of liquid excel and Lift Off and also CIP cycle using 200ppm of chlorine at 90 deg F (per the direction of my chemical company) and this crap is still in the tanks.
Does anyone have any suggestions on how to get rid of this stuff?
Thanks.
Steve Navarro
Co-Owner / Head Brewer
Pacific Brewing & Malting Co.
Tacoma, WA
First of all, I use Wesmar Chemical for all of my chemicals and followed their directions exactly. I have not had this problem with any of the 10 tanks that I have or my BK,MT, or HLT. My initial cleaning on the new tanks was with liquid excel caustic followed by a 40% by volume nitric-phosophoric acid passivation cycle.
I have run the caustic/acid cycle three times, used a degreaser called Lift Off SGF, purple degreaser from Home Depot, a mixture of liquid excel and Lift Off and also CIP cycle using 200ppm of chlorine at 90 deg F (per the direction of my chemical company) and this crap is still in the tanks.
Does anyone have any suggestions on how to get rid of this stuff?
Thanks.
Steve Navarro
Co-Owner / Head Brewer
Pacific Brewing & Malting Co.
Tacoma, WA
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