Localized corrosion of laser marked M340 martensitic stainless steel for biomedical applications
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2015
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INTERNATIONAL SYMPOSIUM ON ELECTROCHEMICAL METHODS IN CORROSION RESEARCH, 11th
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Martensitic stainless steels (SS) are used to produce dental drills and other cutting tools.
Besides elevated hardness, in biomedical applications corrosion resistance to body
fluids and cleaning substances is expected. It has been previously shown [1] that laser
marking increases pitting susceptibility of Mo-containing austenitic SS for implants in
0.14M Cl- only if polarized anodically at potentials higher than 0.7V above the open
circuit potential. In the case of surgical tools, laser marking is necessary for
identification and to indicate the penetration depth of the cutting tool. In the present
work, we studied the influence of laser marking on the localized corrosion of
martensitic M340 (17.3wt% Cr, 1.1wt% Mo). Fig. 1 shows current maps obtained by
the vibrating electrode technique (SVET) at increasing exposure times in 0.1M NaCl
superposed to the “8” numeral drawing marked on M340. Laser marking not only
increases the susceptibility to pitting, but also creates cathodic sites, probably due to
increased conductivity of the oxide
Como referenciar
DICK, LUIS F.P.; MARCOLIN, MARCELO L.; MANHABOSCO, SARA M.; SANTOS, ALVARO P. dos; PIERETTI, EURICO F.; NEVES, MAURICIO D.M. Localized corrosion of laser marked M340 martensitic stainless steel for biomedical applications. In: INTERNATIONAL SYMPOSIUM ON ELECTROCHEMICAL METHODS IN CORROSION RESEARCH, 11th, May 24,29, 2015, Troia, Portugal. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/26766. Acesso em: 30 Dec 2025.
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