Influence of Laser marks on the electrochemical behaviour of the ASTM F139 stainless steel for biomedical application
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International Journal of Electrochemical Science
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The aim of this work is to evaluate the effect of a laser marking technique on the microstructure and
chemical composition at the surface of the ASTM F139 stainless steel and the influence of the surface
modifications on its corrosion resistance. This is one of the most frequently used biomaterial for
prosthesis manufacture. The laser effect on the corrosion resistance has been evaluated by
electrochemical techniques, specifically electrochemical impedance spectroscopy. It was found that the
laser marking reduces the corrosion resistance by modification of the microstructure and surface
chemical composition affecting the surface passive layer, comparatively to the unmarked material. The
surface and chemical composition was analyzed by scanning electron microscope coupled to a highresolution field emission gun (SEM-FEG) and transmission electron microscopy (TEM) with
microanalysis. TEM in areas affected by laser engraving showed a very high density of dislocations
suggesting the presence of residual stresses induced by laser, decreasing the corrosion resistance of the
stainless steel. Aluminum and silicon oxide inclusions were conveyed into the surface exposed to the
corrosive electrolyte by melting the metallic matrix surrounding them during the incidence of the laser
beam. The corrosive attack of this stainless steel matrix surrounding the oxide inclusions creates micro
crevices, promoting pitting corrosion. This is the mechanism proposed to explain the increased
susceptibility to localized corrosion associated to the areas affected by the laser marking process.
Como referenciar
PIERETTI, EURICO F.; NEVES, MAURICIO D.M. das. Influence of Laser marks on the electrochemical behaviour of the ASTM F139 stainless steel for biomedical application. International Journal of Electrochemical Science, v. 11, n. 5, p. 3532-3541, 2016. DOI: 10.1016/S1452-3981(23)17417-7. Disponível em: http://repositorio.ipen.br/handle/123456789/26505. Acesso em: 30 Jun 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.