Corrosion behaviour of heavily deformed pearlitic and brass-coated pearlitic steels in sodium chloride solutions

• Published in: Corrosion science Vol. 86; pp. 275 - 284
• Main Authors: Rault, V., Vignal, V., Krawiec, H., Tadjoa, O.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-09-2014; Elsevier
• Subjects: A. Brass; A. Steel; Applied sciences; B. Polarization; C. Pitting corrosion; Corrosion; Corrosion environments; Exact sciences and technology; Metals. Metallurgy; A. Brass; C. Pitting corrosion; A. Steel; B. Polarization; Pitting corrosion; Brass; Copper base alloys; Pearlitic steel; Sodium chloride
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2014.06.002

•When coupled with brass, the corrosion rate of pearlite increases by a factor of 2.•After plastic deformation, the corrosion rate of pearlite increases by a factor of 3.•Plastic deformation has small influence on cathodic reactions.•Plastic deformation has significant influence on anodic dissolution reactions.•Dissolution of brass is divided into different steps.
The influence of plastic deformation and galvanic coupling on the microstructure and corrosion behaviour of pearlitic steel and brass-coated pearlitic steel was investigated in sodium chloride solution at 25°C. Microstructural changes were quantified using scanning electron microscopy coupled with EBSD. Chemical and electrochemical modifications were evaluated using XPS, ZRA, the electrochemical microcell technique and the weight loss method. From these experiments, the influence of microstructural changes on the electrochemical parameters and the corrosion rate was discussed.