Study of the Synergistic Effect Between Corrosion Inhibitors by Using Fractional Free Volume

doi:10.1007/s40242-019-9171-9

Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (6): 1046-1051.doi: 10.1007/s40242-019-9171-9

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Study of the Synergistic Effect Between Corrosion Inhibitors by Using Fractional Free Volume

LU Yuan¹, ZHANG Chen², WANG Wei¹, ZHAO Jingmao^1,3

1. College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
2. Sinopec Marking South China Company, Guangzhou 510620, P. R. China;
3. Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China

Received:2019-06-21 Revised:2019-08-02 Online:2019-12-01 Published:2019-11-29
Contact: ZHAO Jingmao E-mail:jingmaozhao@126.com
Supported by:
Supported by the National Natural Science Foundation of China(No.51471021).

Abstract

Abstract: The fractional free volumes(FFVs) of the adsorption films formed with different ratios of dipropargyl methoxythiourea imidazoline(DPFTAI) and pyridine quaternary ammonium salt(16BD) were calculated by simulation to determine their synergistic corrosion inhibition effect. The results suggest that the composite corrosion inhibitor at the molar ratio between DPFTAI and 16BD of 4:1 gives the best corrosion inhibition effect. This simulation method to predict the synergistic effect between corrosion inhibitors was further validated by mass loss and electrochemical experiments. This finding delivers valuable understandings of inhibition mechanism of corrosion inhibitors.

Key words: CO₂/H₂S corrosion, Imidazoline, Corrosion inhibitor, Synergistic effect, Fractional free volume

LU Yuan, ZHANG Chen, WANG Wei, ZHAO Jingmao. Study of the Synergistic Effect Between Corrosion Inhibitors by Using Fractional Free Volume[J]. Chemical Research in Chinese Universities, 2019, 35(6): 1046-1051.

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Study of the Synergistic Effect Between Corrosion Inhibitors by Using Fractional Free Volume

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