Effect of Temperature on the Corrosion Resistance of Stainless Steels in Polluted Phosphoric Acid

摘要

Industrial phosphoric acid solutions are chemically complex and their analysis change from one plant to another, depending on the quality of phosphate rocks and the process used in their manufacture.rnPhosphoric acid in pure state is not very corrosive compared to nitric or sulphuric acids. Phosphoric acid was manufactured by the wet process. In this process the phosphate rocks are attacked by sulphuric acid. This technique causes severe corrosion problems due to the presence of impurities such as chlorides, fluorides and sulphides.