Premium
Inhibition action of tween‐80 on the corrosion of cold rolled steel in sulfuric acid
Author(s) -
Li X. H.,
Deng S. D.,
Fu H.,
Mu G. N.
Publication year - 2009
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200905217
Subject(s) - sulfuric acid , adsorption , corrosion , polarization (electrochemistry) , pulmonary surfactant , chemistry , langmuir adsorption model , cathodic protection , atomic force microscopy , corrosion inhibitor , inorganic chemistry , nuclear chemistry , materials science , electrochemistry , electrode , organic chemistry , biochemistry , nanotechnology
The inhibition action of a nonionic surfactant of tween‐80 on the corrosion of cold rolled steel (CRS) in sulfuric acid (H 2 SO 4 ) has been investigated by weight loss and potentiodynamic polarization methods. Atomic force microscope (AFM) provided the CRS surface conditions. The results show that tween‐80 is a good inhibitor in 1.0 M H 2 SO 4 , and its adsorption obeys Langmuir adsorption isotherm. Effects of temperature (20–50 °C) and acid concentration (0.5–7.0 M) on the inhibition action were investigated. Polarization curves show that tween‐80 is a mixed‐type inhibitor in sulfuric acid, but prominently inhibits the cathodic reaction. The results obtained from weight loss and potentiodynamic polarization are consistent, and the inhibition action could also be evidenced by AFM images.