Corrosion Inhibition of Carbon Steel in a Mildly Alkaline Environment by Composition of Biopolymer and Carboxylate

Keywords

steel, corrosion inhibitors, starch, sodium glutamate, reinforced concrete, rebar corrosion, electrochemical impedance spectroscopy

Abstract

The corrosion behavior of St3sp steel was studied in a mildly alkaline environment inhibited by starch and a starch-based composition. The optimal concentration of the inhibitor composition “starch and sodium glutamate” was determined for use in the corrosive medium. A twentyfold increase in charge transfer resistance and a significant decrease in the double-layer capacitance on the carbon steel surface were observed after 120 hours of exposure. The composition demonstrated high efficiency in protecting carbon steel under mildly alkaline corrosive conditions.

References

1. DBN B.2.3-6-2009 Transport facilities. Bridges and pipes. Inspection and testing.
2. Рanyukov E. V. – Reinforced concrete // Encyclopedia of Modern Ukraine. 2001–2025.
3. Troyan V. – Admixtures for concretes and building mortars. – 2010. – P. – 113 – 116.
4. Korniy S., Zin I., Tymus M., Khlopyk O., Holovchuk M. Steel corrosion inhibition by microbial polysaccharide and tartrate mixture // J. Bio- Tribo-Corros. – 2022. – 8. – № https://doi.org/10.1007/s40735-021-00605-5.
5. Umoren S. A., Eduok U. M. Application of carbohydrate polymers as corrosion inhibitors for metal substrates in different media: A review // Carbohydr. Polym. – 2016. – 140. – P. 314–341. https://doi.org/10.1016/j.carbpol.2015.12.038.
6. Adam M.G.O., Koteng D.O., Thuo J.N., Matallah M. Analysing the effect of cassava flour as a mixture on the physical, mechanical and durability properties of high-strength concrete // J. Civ. Eng. – 2022. – 8. P. 3866–3882. https://doi.org/28991/CEJ-2022-08-12-015