Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (6): 55-58.

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Inhibiting Mechanism of Sodium Dithiocarbamate to the Corrosion of Mild Steel in Sulfuric Acid

Fan Hong-bo1  Hu Yong-you2  Zheng Jia-shen3   

  1. 1.Dept.of Chemical Biotechnology,Dongguan Univ.of Tech.,Dongguan 523808,Guangdong,China;2.College of Environmental Science and Engineering,South China Univ.of Tech.,Guangzhou 5 10640,Guangdong,China;3．Dept.of Chemistry,Huazhong Univ.of Science and Tech.,Wuhan 430074,Hubei,China
  • Received:2004-09-14 Online:2005-06-25 Published:2005-06-25
  • Contact: 范洪波(1964-)，男，教授，华南理工大学博士后，主要从事环境工程及材料腐蚀与防护方面的研究． E-mail:fhb@ vip.sina.com
  • About author:范洪波(1964-)，男，教授，华南理工大学博士后，主要从事环境工程及材料腐蚀与防护方面的研究．
  • Supported by:

    教育部博士后科学基金资助项目(2004035027)

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Abstract:

In order to investigate the inhibiting mechanism of sodium dithiocarbamate(DTC)to the corrosion of mild steelin sulfuric acid.a series of dithiocarbamate corosion inhibitors were synthesized by using amine and CS,as the reactants and were then characterized bv IR spectra.Moreover,the inhibition effect of DTC to mild steel in sulfuric acid was investigated by means of the weight lOSS and the electrochemical methods.The resuhs indicate that DTC can obviously inhibit the corosion of mild steelin 0.5 no1/L H2SO4 dsolution.with the inhibition eficiency in.creasing with the concentration of DTC.It is also indicated that DTC behaves as a mixed.type corrosion inhibitor whose inhibition eficiency is significantly influenced by the various substituting groups on nitrogen atoms.

Key words: sulfuric acid, sodium dithiocarbamate, mild steel, corosion inhibitor