open access

https://hdl.handle.net/2115/94215

Elucidation of electrochemical and morphological difference of carbon steel corroded in aqueous chloride solutions at low temperatures

英語

LSV

2023-05-10

Elsevier

Electrochimica acta

450

142220

In humid continental climate areas, brine rejection results in the metal being exposed to higher and changing concentrations of chloride ions derived from precipitation. In this study, the corrosion behavior of carbon steel in different conditions especially in high chloride ions concentrations and at low temperature were investigated via electrochemical methods Liner Sweep voltammetry (LSV), Electrochemical Impedance Spectroscopy (EIS), and surface analysis. The results indicate that the dominant factor in affecting current in the temperature range from 20 degrees C to 0 degrees C is different from that in the range from 0 degrees C to-20 degrees C. It was found that the charge transfer reactions were inhibited in high concentrated NaCl solutions, and corrosion morphology changed from pitting corrosion to general corrosion due to the frequent occurrence of passive film destruction induced by chloride ions. Furthermore, in addition to the common corrosion products found at both 0 degrees C and 20 degrees C, Fe3O4 / gamma-Fe2O3 was detected only at 20 degrees C.

学術雑誌論文

Accepted Manuscript

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

© <2023>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

0013-4686