Abstract

GEETHANJALI, R.  and  SUBHASHINI, S.. Investigation of Corrosion Inhibition Efficiency of Some Synthesized Water Soluble Terpolymers on N-80 Steel in HCl, NaCl and Simulated Oil Well Water. Port. Electrochim. Acta [online]. 2015, vol.33, n.2, pp.85-104. ISSN 0872-1904.  https://doi.org/10.4152/pea.201502085.

Five different water soluble terpolymers, namely polyvinyl alcohol-g-poly(acrylamidevinylsulfonate), polyvinyl alcohol-g-poly(acrylic acid-vinylsulfonate), polyvinyl alcohol-g-poly(acrylamide-vinyl benzene sulfonate), polyvinyl alcohol-g-poly(acrylic acid-vinyl benzene sulfonate) and polyvinyl alcohol-g-poly(vinylsulfonate-vinyl benzene sulfonate), have been designed, developed and tested for their efficacy to control N-80 steel corrosion in 10 % HCl, 3.5 % NaCl and simulated well water. The terpolymer characterization was carried out by FTIR. The inhibitors were tested by potentiodynamic and impedance techniques. The inhibitors were also tested in static and dynamic conditions at 55±5 °C, for 6 hours immersion period by weight loss method. Acrylamide terpolymers rendered the best inhibition efficiency in all the studied systems. The results provided a preliminary validation of the inhibitor such that they can be optimised and used for corrosion in oil and gas industries.

Keywords : N-80 steel; HCl; NaCl; Simulated well water; Dynamic Wheel test; Polyvinyl alcohol; Polyacrylamide; Polyacrylic acid; Vinyl sulphonate; p-vinyl benzene sulphonate.

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