Abstract
The influence of aminophenols on the corrosion and hydrogen permeation of mild steel in 1 M HCl and 0.5 M H2SO4 has been studied using weight loss and gasometric measurements and various electrochemical techniques. All the isomers of aminophenol inhibit the corrosion of mild steel in 1 M HC1 and accelerate it in 0.5 M H2SO4. They behave predominantly as cathodic inhibitors. Aminophenols, except PAP in I M HCI, enhance the permeation current in both the acids. The adsorption of PAP on the mild steel surface in 1 M HCl obeys the Langmuir adsorption isotherm. Surface analysis and ultraviolet spectral studies are also carried out to establish the mechanism of corrosion inhibition and acceleration of mild steel in acidic solutions.
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References
G. Trabanelli, Corrosion 47 (1991) 410.
G. Schmitt, Br. Corros. J. 19 (1984) 165.
J. M. Sykes, ibid. 25 (1990) 175.
P. Chatterjee, M. K. Banerjee and K. P. Mukherjee, Indian J. Technol. 29 (1991) 191.
M. N. Desai, M. K. Gandhi and J. S. Joshi, Trans. SAEST 9 (1974) 173.
M. N. Desai, B. C. Thacker and P. M. Chhaya, J. Indian Chem. Soc. 52 (1975) 930.
N. K. Patel, A. B. Patel and J. C. Vora, Trans. SAEST 8 (1973) 3.
J. D. Patel and R. H. Modi, Br. Corros. J. 14 (1979) 109.
N. Subramanyan, S. Venkatakrishna Iyer and V. Kapali, Trans. SAEST 15 (1980) 251.
P. B. Mathur and T. Vasudevan, Corrosion 38 (1982) 17.
M. A. V. Devanathan and Z. Stachurski, Proc. Roy. Soc., A 270 (1962) 90.
M. Natesan and S. Venkatakrishna Iyer, Proc. 5th Asian Pacific Corrosion Control Conference, Australia, Vol. 1 (1987) p. 351.
S. Rengamani, Ph.D Thesis, Madurai-Kamaraj University (1987) Tamilnadu, India.
A. Frignani, G. Trabanelli and F. Zucchi, Proc. 4th European Symposium on Corrosion Inhibitors, Ann. Univ. Ferrara, Italy (1975) p. 652.
T. P. Hoar and R. P. Khera, Comptes Rendus du Symposium European sur les Inhibit de Corros, Ann. Univ. Ferrara, Italy, N.S. sez. V, suppl. N3 (1961) p. 73.
F. M. Donahue and K. Nobe, J. Electrochem. Soc. 114 (1967) 1012.
N. Hackerman and A. C. Makrides, J. Phys. Chem. 59 (1955) 707.
C. A. Mann, Trans. Electrochem. Soc. 69 (1936) 105.
[19]M. A. Gerovich and G. F. Rybalchenko, Zh. Fiz. Khim. 32 (1958) 109.
Z. A. Foroulis, Proc. 6th European Symposium on Corrosion Inhibitors, Ann. Univ. Ferrara, Italy, N. S., sez. V, Suppl. N.8 (1985) p. 130.
Z. A. Iofa and G. N. Tomashov, Zh. Fiz. Khim. 34 (1960) 1036.
T. Murakawa and N. Hackerman, Corros. Sci. 4 (1964) 387.
F. Mansfeld, Corrosion 37 (1981) 301
ibid. 38 (1982) 570.
T. Tsuru and S. Haruyama, Boshoku Gijutsu, (J. Japan Soc. Corros. Engng) 27 (1978) 573.
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Rengamani, S., Muralidharan, S., Anbu Kulandainathan, M. et al. Inhibiting and accelerating effects of aminophenols on the corrosion and permeation of hydrogen through mild steel in acidic solutions. J Appl Electrochem 24, 355–360 (1994). https://doi.org/10.1007/BF00242066
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DOI: https://doi.org/10.1007/BF00242066