The effect of 5-nitroindazole as an inhibitor for the corrosion of copper in a 3.0% NaCl solution

The inhibition effect of 5-nitroindazole on the corrosion of copper in a 3.0% NaCl solution was investigated with the methods of weight loss, electrochemical tests, scanning electronic microscopy (SEM) and theoretical calculations. The weight loss and electrochemical results revealed that 5-nitroind...

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Bibliographic Details
Published in:RSC advances 2015-01, Vol.5 (78), p.63866-63873
Main Authors: Qiang, Yujie, Zhang, Shengtao, Xu, Shenying, Yin, Linliang
Format: Article
Language:English
Subjects:
Adsorption
COMPUTER SIMULATION
Copper
CORROSION
CORROSION INHIBITORS
Inhibition
MATHEMATICAL ANALYSIS
Quantum chemistry
SODIUM CHLORIDE
Surface chemistry
Weight loss
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Summary:The inhibition effect of 5-nitroindazole on the corrosion of copper in a 3.0% NaCl solution was investigated with the methods of weight loss, electrochemical tests, scanning electronic microscopy (SEM) and theoretical calculations. The weight loss and electrochemical results revealed that 5-nitroindazole is a mixed-type inhibitor with the inhibition efficiency is up to 99% at 0.4 mM, which was further confirmed by SEM observation. The adsorption of the inhibitor molecule on the copper surface was found to obey the Langmuir adsorption isotherm. The quantum chemical calculations and molecular dynamics simulation showed that 5-nitroindazole is adsorbed strongly on the copper surface in a parallel mode through the indazole ring. A new environment-friendly inhibitor which can prevent the chloride corrosion of copper significantly.
ISSN:2046-2069
2046-2069
DOI:10.1039/c5ra12933h