THERMODYNAMICS OF THE INHIBITING PROCESS OF MANNICH BASES ON A3 CARBON STEEL IN HYDROCHLORIC ACID

J Chin Soc Corr Pro

2001, Vol. 21

Issue (3): 144-149 DOI:

Research Report

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THERMODYNAMICS OF THE INHIBITING PROCESS OF MANNICH BASES ON A3 CARBON STEEL IN HYDROCHLORIC ACID

;Jian Xin;Wanzhong Yuan

大连理工大学化学系288信箱

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Abstract Four kinds of Mannich bases were synthesized.Their inhibitive behavior on A3 carbon steel in hydrochloric acid medium was studied.B y means of statistical model and displacement model (Bockris equation),two sets of thermodynamic functions were determined.It was shown that the inhibitive proc ess was exothermic,mainly due to chemical adsorption.Negative values of ΔS revealed that the order of inhibitor molecule was enhanced during adsorption.Neg ative values of ΔG were in accordance with spontaneity of the reaction.The difference between two sets of thermodynamic functions was explained and discuss ed with relevant calculations.

Key words: Mannnich bases inhibitors displacement model statistic al model

Received: 18 February 2000

ZTFLH:

TG174.42

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Jian Xin; Wanzhong Yuan. THERMODYNAMICS OF THE INHIBITING PROCESS OF MANNICH BASES ON A3 CARBON STEEL IN HYDROCHLORIC ACID. J Chin Soc Corr Pro, 2001, 21(3): 144-149 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2001/V21/I3/144

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