Corrosion resistance of carbon steel under an aerobic acidic condition in the presence of borate as corrosion inhibitor
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 4 December 2018
Issue publication date: 24 January 2019
Abstract
Purpose
A high-boron concentration solution is commonly used as a buffer system in the study of metal corrosion. However, it is impossible to apply such a high-boron concentration solution in the practical use because of the high-cost and environment problem.
Design/methodology/approach
In this study, the authors examined the effect of a low dosage of boric acid and borax mixture as inhibitor to suppress carbon steel corrosion in 1 M HCl solution by weight loss experiment and various electrochemistry methods (potentiodynamic polarization curves, electrochemical impedance spectra and electrochemical noise).
Findings
Results showed that the borate mixture exhibited an anodic-type inhibitor characteristic, when the total boron concentration was in the range of 100∼150 mg L−1. The passivation performance derived from the formation of a passive film with and FeBO3-FeOOH structure, whose integrity and thickness gradually increased with the increasing boron concentration.
Originality/value
Low boron solution could protect carbon steel from the attraction of corrosive ions by forming a passive film with Fe-O-B structure. The findings broaden the application range of borate solution in the industry.
Keywords
Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (51579009) and the Beijing municipal science and technology plan projects (Z161100001216009).
Citation
Cui, J., Yuan, W. and Pei, Y. (2019), "Corrosion resistance of carbon steel under an aerobic acidic condition in the presence of borate as corrosion inhibitor", Anti-Corrosion Methods and Materials, Vol. 66 No. 1, pp. 88-100. https://doi.org/10.1108/ACMM-04-2018-1918
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited