Laser processed magnesium Mg alloys

The technique of laser surface melting (LSM) is well known and has been in use for many years for modifying the surfaces of both ferrous and non-ferrous substrates (Liu et al., 2006). LSM of the engineering alloys, in general, is aimed at improving the corrosion resistance by modifying the 

10 Schematic representation of laser surface melting (Majumdar et a ., 2003). 

11 Average corrosion rates of Mg alloys before and after LSM (immersion tests in 5% NaCI solution of pH 10.5) (Abbas eta/., 2005). 

Dubd et al. (2001) reported that the LSM of AZ91D and AM60 alloys using a pulsed Nd-YAG laser did not improve the corrosion resistance and instead it resulted in an enhanced corrosion rate. A non-uniform dendritic 

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