date:Aug 06, 2012
and for nitric acid for cleaning caused the price of nitric acid to increase. Alternative acid cleaners such as sulfuric acid are now being considered for use to remove mineral scale (milk stone).
Sulfuric acid is stronger than phosphoric and nitric acids. Less can be used to deliver equal performance on surfaces soiled with mineral deposits at lower acid concentrations and lower temperatures. But there are fears of its corrosive effects on 304 and 316 grades steel, the most commonly used steel