Effect of Laser Parameters on the Corrosion Resistance of the ASTM F139 Stainless Steel

The investigation on the corrosion resistance of biomaterials and the effects of manufacturing processes, including marking for traceability, is extremely important to evaluate whether the surface modification caused by marking affects the properties of the biomaterial. The engraving process by laser beam has been used to ensure the identification and traceability of orthopedic implants. This study evaluates the influence of the laser marking parameters, specifically the pulse energy and engraving rate, on the corrosion resistance of the ASTM F139 austenitic stainless steel, after engraving with Nd: YAG laser beam by means of electrochemical methods. The electrolyte used was a phosphate buffered solution, with pH 7.4, and 37 degrees C. The results showed that the laser marking parameters affect the protective properties of the passive film and influence the susceptibility to corrosion of this biomaterial.