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Inhibition action of tween-80 on the corrosion of cold rolled steel in sulfuric acid

✍ Scribed by X. H. Li; S. D. Deng; H. Fu; G. N. Mu

Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
309 KB
Volume
60
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

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.

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