Abstract
The electrochemical behaviour and inhibitor protection of 2-amino-5-ethyl-1,3,4-thiadiazole (TTD) on the pitting corrosion of austenitic stainless steel (type 304) in dilute sulphuric acid solution contaminated with recrystallised sodium chloride was evaluated with the aid of potentiodynamic polarization method. TTD greatly reduced the corrosion rate of the steel with a corrosion inhibition efficiency ranging from 88.99–87.36%. The corrosion potential, pitting potential, repassivation potential, nucleation resistance, passivation range and repassivation capacity measurements and potentiodynamic studies were applied to assess the steel’s pitting resistance characteristics and behaviour in the acid chloride media. Results showed that pitting potential values increased with addition of TTD compound in conjunction with increase in the passivation range which strongly indicating increased electrochemical resistance to pitting corrosion.
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Ramana, K.V.S., Anita, T.S., Mandal, S., et al., Mater. Desalinization, 2009, vol. 30, p. 3770.
Ramya, S., Anita, T. and Shaikh, H., Corros. Sci., 2010, vol. 52, p. 2114.
Almarshad, A.I. and Jamal, D., J. Appl. Electrochem., 2004, vol. 34, p. 67.
Nakayama, T. and Oshida, Y., Corrosion, 1968, vol. 24, p. 336.
Schweitzer, P.A., Metallic Materials: Physical, Mechanical, and Corrosion Properties, New York: Marcel Dekker, 2003, 1st ed.
Schweitzer, P.A., Encyclopedia of Corrosion Technology, New York: Marcel Dekker, 2004, 2nd ed.
Kudo, K.T., Shibata, G., Okamoto, G., and Sato, N., Corros. Sci., 1968, vol. 8, p. 809.
Okamoto, G., Corros. Sci., 1973, vol. 13, p. 471.
Galvele, J.R., Corros. Sci., 1981, vol. 21, p. 551.
Standard Guide G48-92, Annual Book of ASTM Standards, 1994.
Ibrahim, M.A.S., Abd El Rehim, S.S. and Hamza, M.M., Mater. Chem. Phys., 2009, vol. 115, p. 80.
Szklarska-Smialowska, Z., Pitting Corrosion of Metals, Houston, USA: Natl. Assoc. Corros. Eng., 1986.
Strehblow, H.H., in Corrosion Mechanisms in Theory and Practice, Marcus, P. and Oudar, J., Eds., New York, 1995.
Natishan, P.M., Kelly, R.G., Frankel, G.S., and Newman, R.C., Electrochem. Soc., Proc., 1995, vol. 95, p. 15.
Frankel, G.S., Mater. Sci. Forum, 1997, vol. 247, p. 1.
Frankel, G.S., J. Electrochem. Soc., 1998, vol. 145, p. 2186.
Maurice, V., Klein, L.H. and Marcus, P., Electrochem. Solid-State Lett., 2001, vol. 4, p. B1.
Pawel, S.J., Stansbury, E.E and Lundin, C.D., Corrosion, 1989, vol. 45, no. 2, p. 125.
Baker, M.A. and Castle, J.E., Corros. Sci., 1993, vol. 34, no. 2, p. 667.
Nogueira, T.M. C and Mattos, O.R., Electrochem. Methods Corros. Res., 1986, vol. 8, p. 43.
Haupt, S. and Strehblow, H.H., Corros. Sci., 1995, vol. 37, no. 1, p. 43.
Kaneko, M. and Issacs, H.S., Corros. Sci., 2002, vol. 44, p. 1825.
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Loto, R.T., Loto, C.A. Pitting corrosion inhibition of type 304 austenitic stainless steel by 2-amino-5-ethyl-1,3,4-thiadiazole in dilute sulphuric acid. Prot Met Phys Chem Surf 51, 693–700 (2015). https://doi.org/10.1134/S2070205115040231
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DOI: https://doi.org/10.1134/S2070205115040231