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SVET characterization of corrosion process in carbon steel 1020

Vichessi, R. B.; Calegari, F.; Marino, C. E. B.; Berton, M. A. C.;

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The study of corrosion process on metal surfaces has been widely conducted for several years, from classical nondestructive electrochemical techniques, such as Open Circuit Potential (OCP) and Electrochemical Impedance Spectroscopy (EIS). However, these techniques allow only the analysis of the global response of the electrochemical system, whereas the regions where localized corrosion occurs (pitting, crevice, passive film rupture, etc.) are left without identification.

One of the localized electrochemical techniques, the latter of these systems, named SVET (Electrochemical Technique Vibrating Electrode), allows an improved resolution and lower minimum detectable signal in the evaluation of the corrosion phenomena. This technique stands out because it allows mapping the exact location at separated sites in the metal/electrolyte interface where the anodic and cathodic processes take place enabling the distinction of the contribution of each event.

In this study, SVET technique was used to investigate the corrosion process of carbon steel in media containing chloride. Carbon steels are ferrous alloys made of iron and carbon, widely used in engineering and industry. The SVET results showed the evolution of corrosion process in function of time on steel sample. This recent electrochemical technique allowed the analysis and differentiation of intensity of oxidation reaction in different regions of the sample.

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Palavras-chave: SVET, carbon steel, corrosion,

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DOI: 10.5151/chempro-s3ie2016-01

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Como citar:

Vichessi, R. B.; Calegari, F.; Marino, C. E. B.; Berton, M. A. C.; "SVET characterization of corrosion process in carbon steel 1020", p. 11-20 . In: Proceedings of 2nd International Seminar on Industrial Innovation in Electrochemistry . São Paulo: Blucher, 2016. São Paulo: Blucher, 2016.
ISSN 2318-4043, DOI 10.5151/chempro-s3ie2016-01

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