Influence of phytic acid on the corrosion behavior of carbon steel with different surface treatments
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 21 September 2018
Issue publication date: 30 October 2018
Abstract
Purpose
This paper aim to investigate the influence of PA on the corrosion behavior of carbon steel with blast cleaned or pre-rusted treatments, and interpret the inhibition mechanism of PA on the steel with different surface treatments.
Design/methodology/approach
The influence of PA on the corrosion behavior of blast cleaned or rusty steel was investigated by means of electrochemical impedance spectroscopy (EIS). The EIS data were analyzed using the @ZsimpWin commercial software. The morphology and component of steel after immersion were characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), Fourier transformation infrared (FTIR) and X-ray diffractometer (XRD).
Findings
EIS analysis results indicated that PA had good corrosion inhibition for blast cleaned or rusty steel. SEM, EDS, FTIR and XRD further indicated that PA had two main corrosion inhibition processes for the corrosion inhibition of blast cleaned or rusty steel: corrosion dissolution and formation of protective barrier layers.
Originality/value
Most published works focus the attention only toward the effect of corrosion inhibitor for the clean metal surfaces. However, the surface condition of metal sometimes is unsatisfactory in the practical application of corrosion inhibitor, such as existing residual rust. Some studies also have shown that several corrosion inhibitors could be applied on partially rusted substrates. These inhibitors mainly include tannins and phosphoric acid, but not PA. Therefore, the authors investigated the influence of PA on the corrosion behavior of carbon steel with blast cleaned or pre-rusted treatments in this paper.
Keywords
Acknowledgements
The authors wish to acknowledge the financial supports of the Research Foundation for the Introduction of Talent of Sichuan University of Science and Engineering, China (Grant No. 2016RCL13), the Foundation of Material Corrosion and Protection Key Laboratory of Sichuan Province, China (Grant No. 2016CL11, No. 2017CL10), Education Department of Sichan Province, China (Grant No. 17ZA0279) and Foundation of Youth Science and Technology Innovation Team of Sichuan Province (2016TD0024).
Citation
Zhang, Y., Dou, B., Shao, Y., Cui, X.-J., Wang, Y., Meng, G. and Lin, X.-Z. (2018), "Influence of phytic acid on the corrosion behavior of carbon steel with different surface treatments", Anti-Corrosion Methods and Materials, Vol. 65 No. 6, pp. 658-667. https://doi.org/10.1108/ACMM-05-2018-1937
Publisher
:Emerald Publishing Limited
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