AN INVESTIGATION INTO THE ADSORPTION OF THIOUREA ON PURE IRON IN SULPHURIC ACID

J Chin Soc Corr Pro

1989, Vol. 9

Issue (4): 327-332 DOI:

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AN INVESTIGATION INTO THE ADSORPTION OF THIOUREA ON PURE IRON IN SULPHURIC ACID

Jiang Fuhua Xia Yunnan Gui Jianghong Tang Guangtu and Li Fangsheng (Wuhan Iron Steel University)

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Abstract The adsorption behaviour of thiourea (TU) on pure iron was investigated in 0.5～2.0 mol·dm~(-3) H_2SO_4 over the temperature range of 20～60℃. The process was treated as a sabstitutional adsorption process. The degree of surface coverage increased with temperature and TU concentration. It was shown that at low TD concentrations the adsorption behaviour followed a Flory-Huggins isotherm with negligible lateral interaction. TU molecules were parallely adsorbed on the surface. At higher TU concentrations the molecules did not change their orientation, but the adsorption behaviour followed a Frumkin-type isotherm with strong lateral repulsion. The Gibbs energy, enthalpy and entropy of adsorption were calculated. The effect of temperature on the degree of surface coverage was at tributed to entropy, rather than enthalpy.

Received: 25 August 1989

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Jiang Fuhua Xia Yunnan Gui Jianghong Tang Guangtu and Li Fangsheng (Wuhan Iron Steel University). AN INVESTIGATION INTO THE ADSORPTION OF THIOUREA ON PURE IRON IN SULPHURIC ACID. J Chin Soc Corr Pro, 1989, 9(4): 327-332.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1989/V9/I4/327

[1] Case, B.; Anoson, F.C, J.Phys.Chem.71,402(1961)
[2] Narayan, R.; Hackerman, N., J.Electrochem.Soc.118,1426 (1971)
[3] Hills, G.; Silva, F., J.electroanalyt.Chem.137, 387(1982)
[4] Frumkin, A.N.; Grigorev, N.B., J.electrochcm.Soc.119． 1695 (1972)
[5] Ateya, B.G.; El-Anadouli, B.E.: EL-Nijamy, F.M., Corros.Sci 24． 509(1984)
[6] Subramanyam, N.C; Mayanna, S.M., Corros.Sci.25,163(1985)
[7] 周盛奇,曹楚南,中国腐蚀与防护学报,6,290(1986)
[8] Lipkowski, J.; Galus, J.Eleetroanalyt.Chem.61, 11(1975)
[9] Giudelli, R.; Foresti, M, L,, J, Electroanalyt.Chem, 77, 73(1977)
[10] Ateya, B.G; El-Anadouli, B.E.; El-Nijamy, F.M., Corros.Sci.,24, 497(1984)
[11] Cavallaro, L.; Felloni, L.; Trabanelli, G.; Palider, F., Electrochim;Acta.8, 521 (1963)
[12] 蒋馥华,陈达士,《物理化学》,地质出版社,北京,P374,(1985)
[13] 查全性,《电极过程动力学导论》(第二版),科学出版社,北京,P171,(1987)
[14] Parsons, R.; Peat, R.; Reeves, R.M., J.electroanalyt.Chem.62,151(1975

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