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N,N-Dipropynoxy methyl amine trimethyl phosphonate as corrosion inhibitor for iron in sulfuric acid

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Abstract

The corrosion inhibition of iron in 0.5 M sulfuric acid by N, N-dipropynoxy methyl amine trimethyl phosphonate has been investigated by means of the potentiodynamic polarization and electrochemical impedance spectrum (E.I.S) techniques. N,N-dipropynoxy methyl amine trimethyl phosphonate was studied in concentrations from 40 ppm to 320 ppm at a temperature of 298 K. The results show that the inhibition mechanism of N,N-dipropynoxy methyl amine trimethyl phosphonate is mixed controlled. It is also found that this inhibitor obeys the Frumkin adsorption isotherm and Flory-Huggins isotherm based on a substitutional adsorption process.

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Authors and Affiliations

  1. Department of Materials Science & Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA

    Tianbao Du

  2. Institute of Corrosion and Protection of Metals, Chinese Academy of Sciences, Shenyang, 110015

    Jiajian Chen & Dianzhen Cao

Authors
  1. Tianbao Du
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  2. Jiajian Chen
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  3. Dianzhen Cao
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Correspondence to Tianbao Du.

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Du, T., Chen, J. & Cao, D. N,N-Dipropynoxy methyl amine trimethyl phosphonate as corrosion inhibitor for iron in sulfuric acid. Journal of Materials Science 36, 3903–3907 (2001). https://doi.org/10.1023/A:1017909919388

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