On the interaction between uniaxial stress loading and the corrosion behavior of the ISO 5832-1 surgical stainless steel

SANTOS, REGIANE C.F. dosNAVILLE, WILLIAMLIMA, NELSON B. deCOSTA, ISOLDAANTUNES, RENATO A.2021-07-192021-07-192021SANTOS, REGIANE C.F. dos; NAVILLE, WILLIAM; LIMA, NELSON B. de; COSTA, ISOLDA; ANTUNES, RENATO A. On the interaction between uniaxial stress loading and the corrosion behavior of the ISO 5832-1 surgical stainless steel. <b>Journal of Materials Engineering and Performance</b>, v. 30, n. 4, p. 2691-2707, 2021. DOI: <a href="https://dx.doi.org/10.1007/s11665-021-05662-y">10.1007/s11665-021-05662-y</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/32026.1059-9495http://repositorio.ipen.br/handle/123456789/32026The interaction between the uniaxial stress loading and the corrosion behavior of the surgical ISO 5832-1 stainless steel is addressed in the present work. Specimens were subject to uniaxial tensile and compressive stress at two different deformation levels (15 and 30%). The effect of the different loading modes and deformation levels on the residual stresses was investigated by x-ray diffraction. The composition of the passive films formed on each sample was assessed by x-ray photoelectron spectroscopy (XPS). The corrosion behavior was studied by electrochemical impedance spectroscopy and potentiodynamic polarization in phosphate-buffered solution at 37 °C. The semiconducting character of the passive films was determined by the Mott-Schottky approach. Our findings point to a positive effect of compressive loading on the corrosion resistance of the steel. The passive current density (ipass) decreased for the strained samples, especially for that subject to 15% compressive deformation for which ipass was 63% lower than for the as-received steel. The passive film formed at this condition presented strong Cr2O3 enrichment, according to XPS results. Moreover, the compressive stresses favored the formation of a passive film with fewer defects, decreasing the donors density. The results are discussed based on the correlation between residual stresses, passive film composition and its electronic properties.2691-2707openAccessstainless steelssemiconductor materialspassivityfilmsplasticsresidual stressesOn the interaction between uniaxial stress loading and the corrosion behavior of the ISO 5832-1 surgical stainless steelArtigo de periódico43010.1007/s11665-021-05662-y0000-0002-4987-33340000-0002-6444-9224https://orcid.org/0000-0002-4987-3334https://orcid.org/0000-0002-6444-922424.7851.67