Nace Rp 0391 Pdf -

for carbon steel to reduce corrosion and maintain acid purity. Linings and Coatings:

Because sulfuric acid is hygroscopic (absorbs moisture from the air), storage tanks must be sealed. Moisture dilution at the surface of 98% acid can turn it into highly corrosive, lower-concentration acid, damaging the tank roof and vents. NACE RP0391 vs. Other Standards nace rp 0391 pdf

The keyword refers to a critical industrial standard practice published by NACE International (now part of AMPP ) titled "Materials for the Handling and Storage of Commercial Concentrated (90 to 100%) Sulfuric Acid at Ambient Temperatures." for carbon steel to reduce corrosion and maintain