Electrochemical characterization of an optical fiber laser-treated biomaterial
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2018
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Biomaterials
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Resumo
The implant manufacturing process includes texturization to enhance its adhesion and
marking the final products for their identification, long-term quality control and traceability.
Marking is carried out after cleaning and prior to sterilization. These marks eventually
can concentrate stress leading to premature failure. The marked areas are defective
regions that affect the passive film formed on the metallic biomaterials used for implants
favoring the onset of various corrosion types, such as pitting, crevice or fatigue. This
study aims to evaluate the effect of a Yb optical fiber laser marking processes used for
metallic implants on the localized corrosion resistance of the austenitic stainless steel ISO
5832-1. This is one of the most used materials for manufacturing implants. The electrochemical
behavior of the marked areas obtained by this method was evaluated in a phosphate-
buffered saline (PBS) solution with pH of 7.4 and the results were compared with
unmarked samples. All tested surfaces were prepared according to the recommendations
for the use in surgery. For localized corrosion resistance evaluation, electrochemical tests
such as monitoring the open circuit potential (OCP), electrochemical impedance spectroscopy
(EIS) and cyclic potentiodynamic polarization measurements were performed.
The results showed that the laser marks affect the protector characteristics of the biomaterial’s
passive film. Lower pitting resistance was associated to the laser marked areas.
Como referenciar
PIERETTI, EURICO F.; CORREA, OLANDIR V.; PILLIS, MARINA F.; NEVES, MAURICIO D.M. das. Electrochemical characterization of an optical fiber laser-treated biomaterial. In: PIGNATELLO, ROSARIO (ed.); MUSUMECI, TERESA (ed.). Biomaterials. London: IntechOpen, 2018. , cap. 5. p. 75-85. DOI: 10.5772/intechopen.72653. Disponível em: http://repositorio.ipen.br/handle/123456789/29453. Acesso em: 13 Dec 2024.
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.