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2020, vol. 61, iss. 2, pp. 133-139
Corrosion behaviour of stainless steel EN 1.4301 in acid media in presence of PBTCA inhibitor
aUniversity of Banja Luka, Faculty of Technology, Republic of Srpska, B&H
bEFT Mine and Thermal Power Plant Stanari Ltd., Stanari, R. Bosnia and Herzegovina

emailtijana.malinovic@tf.unibl.org
Project:
This work was supported in part by the Ministry of Scientific and Technological Development, Higher Education and Information Society Government of Republic of Srpska under Project 19/6-020/961-79/18

Keywords: Corrosion rate; protection efficiency; DC-technique
Abstract
In this study, corrosion behaviour of stainless steel in 0.5 M and 1 M hydrochloric acid was examined. Also, commercial corrosion inhibitor which contain 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) is examined as potential inhibitor for stainless steel EN 1.4301 in 0.5 M hydrochloric acid. For experimental research it was used DC-technique (Tafel extrapolation, linear polarization method and potentiodynamic polarization). The obtained results show that the inhibitor is effective in mentioned acid environment and the protection efficiency depends primarily on the concentration of the inhibitor. Based on the obtained results this inhibitor has moderate inhibition efficiency, since the highest efficacy was achieved Ei = 55.7%. According to the corrosion mechanism the inhibitor is behaved as a mixed inhibitor.
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article language: English
document type: Scientific Paper
DOI: 10.5937/zasmat2002133M
published in SCIndeks: 15/06/2020
Creative Commons License 4.0

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