Crystal Structure, Surface Activity and Corrosion Inhibition Effect of Dihydroxyethyl Ammonium O,O'-di(4-methylpheny) dithiophosphate for Q235 Steel in 1.0 M H₂SO₄

摘要

The hydrophilic corrosion inhibitor of dihydroxyethyl ammonium O,O'-di(4-methyl pheny)dithio-phosphate (DAOP) was synthesized. Meanwhile, the crystal structure, surface activity and corrosioninhibition of DAOP were presented in this work. The weight loss and potentiodynamic polarizationmeasurements results all shows that DAOP is an effective hydrophilic corrosion inhibitor for Q235steel (QS-235) in 1.0 M H 2 SO 4 . Potentiodynamic polarization measurements present that DAOP is amixed-type inhibitor, which adsorbed on QS-235 surface attributable to both physisorption andchemisorption.