INHIBBITIVE EFFECT AND MECHANISM OF ETHANOLAMINE-MOLTBSATES FOR CARBON STEEL

J Chin Soc Corr Pro

1995, Vol. 15

Issue (4): 279-284 DOI:

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INHIBBITIVE EFFECT AND MECHANISM OF ETHANOLAMINE-MOLTBSATES FOR CARBON STEEL

Chen Xujun; Xu Yue;Ma Renchuan; Yang Xianbo(Department of Applied Chemistry; Beijing University of Chemical Engineering)

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Abstract The inhibitive effect of three ethanolamine-molybdates for carbon steel in deionized water was evaluated. Test techniques used included weight-loss, polarization curves, ionizability, scratched electrode, EIS and XPS. It was found that all three inhibitors synthesized for this purpose had pretty good inhibitive effects for carbon steel. The organic and inorganic function groups in the inhibitor molecules exhibited excellent synergistic action on corrosion inhibition. The inhibition increased with increasing number of the hydroxy-ethyl function groups in the molecules. They were mired-type inhibitors, but mainly restrained the anodic process of corrosion.Both the passivation ability of the carbon steel and the repair ability of the protective films formed on it were enhanced by ethanolamine-molybdates in the medium under study. A part of MoO was reduced to MoO2 during the formation of the films. A possible inhibitive mechanism was discussed.

Key words: Ethanolamine-molybdates Inhibitive effect Inhibitor Carbon steel

Received: 25 August 1995

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Chen Xujun; Xu Yue;Ma Renchuan; Yang Xianbo(Department of Applied Chemistry; Beijing University of Chemical Engineering). INHIBBITIVE EFFECT AND MECHANISM OF ETHANOLAMINE-MOLTBSATES FOR CARBON STEEL. J Chin Soc Corr Pro, 1995, 15(4): 279-284.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1995/V15/I4/279

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