Abstract
The application of laser surface treatment to improve the corrosion resistance of ferrous alloys is discussed. By dissolving precipitates of phases present in small proportions in the alloy’s microstructure (carbides, nitrides, intermetallic compounds, etc.) or preventing their precipitation during cooling, laser surface treatment improves, in general, the localised corrosion resistance of ferrous alloys, in particular of stainless steels. However, in order to achieve this improvement, chemical and microstructural inhomogeneities resulting from the laser treatment process must be avoided.
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