INHIBITION EFFECT OF DODECYLAMINE ON CARBON STEEL CORROSION IN HYDROCHLORIC ACID SOLUTION

Zhenyu Chen (), Ling Huang, Yubing Qiu and Xingpeng Guo
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Zhenyu Chen: School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Ling Huang: School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Yubing Qiu: School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Xingpeng Guo: School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Surface Review and Letters (SRL), 2012, vol. 19, issue 06, 1-8

Abstract: Dodecylamine spontaneously adsorbs on carbon steel via its polar group(-NH2)in hydrochloric acid solution. Furthermore, it forms a monolayer film on carbon steel surface. The inhibition mechanism of dodecylamine for carbon steel is geometric blocking effect. The adsorption of dodecylamine on carbon steel surface follows Arrhenius equation. The adsorption slightly increases activated energy, but greatly reduces pre-exponential factor value. Atomic force microscopy force curves indicate that at the area without adsorbed dodecylamine, no obvious adhere force occurs. At the area with adsorbed dodecylamine, however, an average 1.3 nN adhere force is observed.

Keywords: Dodecylamine; inhibition; adsorption; atomic force microscopy; 82.65.My (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1142/S0218625X12500606

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