... ,getting away oxidize surface. 2.Slightly corrosive to metal, usedto flush boiler. Sulfamic Acid CharacteristicsWhite orthorhombic cystal. Nonvolatile, nonhygroscopic,smell-less ... cleaning,getting away oxidize surface.Slightly corrosive to metal, usedto flush boiler, and sterilize bacterium in water.Bleach fibre,wood and ...