Effect of aluminium spacer on galvanic corrosion between magnesium and mild steel using numerical model and SVET experiments

• Published in: Corrosion science Vol. 62; pp. 184 - 191
• Main Author: Deshpande, Kiran B.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2012; Elsevier
• Subjects: A. Aluminium; A. Magnesium; A. Mild steel; Aluminium; Aluminum; Applied sciences; B. Modelling studies; Carbon steels; Corrosion; Corrosion environments; Current density; Exact sciences and technology; Galvanic corrosion; Magnesium; Metals. Metallurgy; Spacers; Surface area; A. Magnesium; A. Mild steel; A. Aluminium; B. Modelling studies; Galvanic corrosion; Carbon steel; Modeling
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2012.05.013

► Investigation of effect of spacer for different area ratios of AE44–mild steel. ► Change in anodic current density is different for different surface area ratios. ► Good agreement between numerical model estimates and SVET experimental results. ► Investigation of the effect of electrolyte depth on the galvanic corrosion. The effect of metallic (aluminium) spacer on galvanic corrosion between magnesium alloy (AE44) and mild steel couple comprised of equal and unequal surface areas is investigated in this work using the numerical modelling and the scanning vibrating electrode technique (SVET) experimental approaches. A reduction in the peak anodic current density is found to be around 26% and 66% for equal and unequal surface area of AE44 and mild steel, respectively, with 5mm wide aluminium spacer when compared to no spacer configuration. The effect of electrolyte depth on the peak and the average current densities is also investigated.