Original scientific paper

Corrosion inhibition of carbon steel in saline solutions by gluconate, zinc sulphate and green clay eluate

Franjo Ivušić ; Croatian Academy of Sciences and Arts, The Institute for Corrosion Research and Desalinization, Vlaha Bukovca 14, 20000 Dubrovnik, Croatia
Olga Lahodny-Šarc ; Croatian Academy of Sciences and Arts, The Institute for Corrosion Research and Desalinization, Vlaha Bukovca 14, 20000 Dubrovnik, Croatia
Ivan Stojanović ; University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Ivana Lučića 5, 10000 Zagreb, Croatia

Abstract

The effect of gluconate, zinc sulphate and green clay eluate on the corrosion inhibition of carbon steel (EN S235 JRG) in 0,5 % and 3,5 % sodium chloride solution has been evaluated in this work using Tafel polarization technique. Substantial general corrosion inhibition using sodium gluconate solely can be obtained with moderate concentrations. In this case, corrosion inhibition is predominately obtained by anodic mechanism and is limited to general corrosion, whereas carbon steel becomes liable to localised pitting corrosion. However, when sodium gluconate is combined with zinc sulphate and/or green clay eluate in adequate concentrations both general and localized corrosion are diminished which indicates good synergy between applied inhibitors.

Keywords

carbon steel; corrosion inhibition; gluconate; green clay; saline solution

Hrčak ID:

116582

URI

https://hrcak.srce.hr/116582

Publication date:

21.2.2014.

Article data in other languages: croatian

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