The materials that has been proven as a light weight, durable and affordable is Aluminium and Magnesium. The amalgamation of high strength and low density property suits the wide range of engineering applications such as naval ships to go faster speeds and cargo ships carrying bigger payloads. Emerging technologies and advancements make Aluminium alloys as the best choice for military ships and automotives and Magnesium alloys as the best choice for automotive applications. These applications subject to an array of different types of varying loads in the marine and / or corrosive environment. Their environmental exposure and loading creates corrosion features such as pitting that produces crack initiation morphologies. Nucleation of these cracks followed by their growth under the influence of mechanical stress and corrosion leads to structural failure. This review paper deals with the corrosion and corrosion mechanisms of Aluminium and Magnesium alloys exposed to marine and corrosive environment, corrosion of welded structures and measures for enhancing the corrosion resistance. The development of new cast or wrought alloys, metal matrix composites and chemical agents (corrosion inhibitors) for enhancing the corrosion resistance are also discussed.
Vaira Vignesh R. and Dr. Padmanaban R., “Corrosion of Aluminium and Magnesium Alloys: A Review”, International Conference on Modelling, Simulation and Control, vol. 1. pp. 377-383, 2015.