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J Chin Soc Corr Pro  1986, Vol. 6 Issue (4): 289-295    DOI:
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ADSORPTION OF ORGANIC AMINES ON IRON SURFACE FROM ACIDIC SOLUTIONS
Zhou Shengqi and Cao Chunan(Iustitute of Corrosion and Protectien of Metals; Academia Sinica)
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Abstract  Corrosion rate and interface capacity of iron in acidic perchloride solutions cantaining decylamine(DA), dipentylamine(DPA) and dodecylamine(DDA) with or without chloride ion have been measured by curve-fitting method of weak polarization data and AC impedance technique. The degree of coverage of organic amines on Fe surface has been calculated as a function of bulk concentration of amines. It has been found that organic amines are adsorbed from the solutions both with and without Cl- on the Fe surface according to Temkin isotherm and Frumkin isotherm in two different regions. The effect of adsorbed organic amine molecules on the interface capacity between electrode and solution is discussed, and a model for discribing the adsorption of organic amine molecules from acidic solutions on the Fe surface is proposed, with which the experimental results of the inhibition of organic amines and the synergistic effect of Cl- ion with them are interpreted.
Received:  25 August 1986     
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Zhou Shengqi and Cao Chunan(Iustitute of Corrosion and Protectien of Metals; Academia Sinica). ADSORPTION OF ORGANIC AMINES ON IRON SURFACE FROM ACIDIC SOLUTIONS. J Chin Soc Corr Pro, 1986, 6(4): 289-295.

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https://www.jcscp.org/EN/     OR     https://www.jcscp.org/EN/Y1986/V6/I4/289

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