Use of natural extracts as corrosion inhibitors for AISI 304 steel

Abstract

The research is based on the study of the effect of non-toxic compounds on the environment and renewable natural resources, using them as environmentally safe corrosion inhibitors for AISI 304 steel in 0.1 mol /L. The evaluation of the corrosion protection was done with the immersion of steel plates of aqueous and ethanolic extracts of mate and green tea. The corrosion potential was determined using a saturated calomel electrode as reference. In the absence of inhibitors in a time of 60 minutes, the control test showed corrosion potential equal to -158 mV / ECS. However, in the presence of mate aqueous extract, the Ecorr was - 138 mV/ECS and -149 mV / ECS for the aqueous extract of green tea. The ethanolic extracts of mate and green tea presented potential corrosion results of -58 mV / ECS and -143 mV / ECS, respectively. Only the ethanolic extract of mate presented significative results in the inhibition of the corrosive process in the metal study, presenting meaningful values ​​of Eca before and after inhibitor treatment statistically different by pareid sample t-test. Thus, the ethanolic extract of mate grass presents potential use as a green corrosion inhibitor.

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References

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Published
2019-01-02
How to Cite
DA SILVA, Juliana Araujo et al. Use of natural extracts as corrosion inhibitors for AISI 304 steel. Acta Brasiliensis, [S.l.], v. 3, n. 1, p. 21-24, jan. 2019. ISSN 2526-4338. Available at: <http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/119>. Date accessed: 04 aug. 2020. doi: https://doi.org/10.22571/2526-4338119.
Section
Environmental Chemistry