Advanced search

Electrochemical study on the corrosion of rusted carbon steel in dilute NaCl solutions

Jiayuan Hu (Environmental Engineering Department, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China, and)
Shun-an Cao (Department of Water Quality Engineering, College of Power and Mechanical Engineering, Wuhan University, Wuhan, China)
Li Yin (Department of Water Quality Engineering, College of Power and Mechanical Engineering, Wuhan University, Wuhan, China)
Yang Gao (Department of Water Quality Engineering, College of Power and Mechanical Engineering, Wuhan University, Wuhan, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Publication date: 29 April 2014

Abstract

Purpose

The purpose of this study was to investigate the corrosion of rusted carbon steel in dilute NaCl solution, with the purpose of exploring the effect of the rust layer on metal corrosion and establishing a corrosion model for rusted iron.

Design/methodology/approach

The corrosion behavior of rusted carbon steel in dilute NaCl solution was studied by means of weight-loss determinations, scanning electron microscopy, Raman spectrometry and electrochemical techniques.

Findings

The results indicated that carbon steel had a similar corrosion behavior in all three NaCl solutions. The iron rust, which consisted of a thin γ-FeOOH layer and a thick Fe3O4 layer, can facilitate the corrosion process of carbon steel via reduction of γ-FeOOH and the large area cathode of Fe3O4. Hence, the corrosion rate of carbon steel was accelerated significantly and finally was determined by the limiting diffusion rate of oxygen.

Originality/value

A corrosion model of rusted carbon steel was established, suggesting that iron rust formed in all slightly acidic waters with low alkalinity probably promotes the corrosion of carbon steel. Anti-corrosion measures for iron in this type of solution, such as desalination water, should be aimed to reduce the promotional effect of the rust layer on metal corrosion.

Keywords

Citation

Hu, J., Cao, S.-a., Yin, L. and Gao, Y. (2014), "Electrochemical study on the corrosion of rusted carbon steel in dilute NaCl solutions", Anti-Corrosion Methods and Materials, Vol. 61 No. 3, pp. 139-145. https://doi.org/10.1108/ACMM-05-2013-1261

Download as .RIS

Publisher

:

Emerald Group Publishing Limited

Copyright © 2014, Emerald Group Publishing Limited

To read the full version of this content please select one of the options below

You may be able to access this content by logging in via Shibboleth, Open Athens or with your Emerald account.
To rent this content from Deepdyve, please click the button.
Rent from Deepdyve
If you think you should have access to this content, click the button to contact our support team.
Contact us
Manage cookies

We’re listening — tell us what you think

Join us on our journey