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Inhibition Effect Of Dodecylamine On Carbon Steel Corrosion In Hydrochloric Acid Solution

Author

Listed:
  • 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)

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.

Suggested Citation

  • Zhenyu Chen & Ling Huang & Yubing Qiu & Xingpeng Guo, 2012. "Inhibition Effect Of Dodecylamine On Carbon Steel Corrosion In Hydrochloric Acid Solution," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 19(06), pages 1-8.
    • Handle: RePEc:wsi:srlxxx:v:19:y:2012:i:06:n:s0218625x12500606
    DOI: 10.1142/S0218625X12500606
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