Surface and electrochemical characterization of pitting corrosion behaviour of 304 stainless steel in ground water media |
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| Authors: | D Gopi S Manimozhi K M Govindaraju P Manisankar S Rajeswari |
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| Affiliation: | (1) Department of Chemistry, Periyar University, Salem, 636 011, Tamilnadu, India;(2) Department of Analytical Chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India |
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| Abstract: | The effectiveness of aminotrimethylidene phosphonic acid (ATMP) as a corrosion inhibitor in association with a bivalent cation
like Zn2+ and non-ionic surfactant like polyoxyethylene sorbitan monooleate (Tween 80) were investigated by measuring corrosion losses
using electrochemical techniques. The corrosion of 304 stainless steel in the ground water medium was inhibited by complexation
of the inhibitor. A combined inhibition effect was achieved by adding both ATMP and Zn2+ along with Tween 80. The formulation functioned as a mixed type inhibitor. The synergistic effect of the inhibitor compound
is calculated. Luminescence spectra, FTIR spectra, XRD, XPS and scanning electron microscopic studies were carried out to
understand the mode of corrosion inhibition and also the morphological changes on the metal surface. |
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| Keywords: | 304 Stainless steel Pitting corrosion Corrosion inhibition Impedance Surface characterization XPS |
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