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Metals 2017, 7(2), 44; doi:10.3390/met7020044

The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution

1
College of Chemistry & Pharmacy, Northwest A&F University, Xinong Road No. 22, Yangling 712100, China
2
College of Information Engineering , Northwest A&F University, Xinong Road No. 22, Yangling 712100, China
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 5 January 2017 / Revised: 25 January 2017 / Accepted: 3 February 2017 / Published: 5 February 2017
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Abstract

Two environmental friendly triazinedithiol inhibitors 6-diallylamino-1,3,5-triazine-2,4-dithiol monosodium (DAN) and 6-dibutylamino-1,3,5-triazine-2,4-dithiol monosodium (DBN) were synthesized and their corrosion inhibition for aluminum alloy in a 1 M HCl solution was studied using weight loss methods, electrochemical measurements, and scanning electron microscopy (SEM) techniques. The inhibition efficiency of both DAN and DBN improved with increases in inhibitor concentration but decreased with increases in temperature. Results from potentiodynamic polarization and EIS showed that the corrosion inhibition efficiency of DAN and DBN was excellent. The adsorption of inhibitors on the aluminum alloy surface followed Langmuir adsorption isotherms. Morphology observation revealed that the aluminum alloy was greatly protected by these triazinedithiol inhibitors. Further, density functional theory (DFT) was used to investigate the relationships between molecular structural and inhibition efficiency. View Full-Text
Keywords: aluminum alloy; potentiodynamic polarization; corrosion inhibition aluminum alloy; potentiodynamic polarization; corrosion inhibition
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Zhao, Q.; Tang, T.; Dang, P.; Zhang, Z.; Wang, F. The Corrosion Inhibition Effect of Triazinedithiol Inhibitors for Aluminum Alloy in a 1 M HCl Solution. Metals 2017, 7, 44.

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