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Electrochemical behavior of two austenitic stainless steel biomaterials
| Content Provider | Scilit |
|---|---|
| Author | Giordano, Enrico J. Alonso-Falleiros, Neusa Ferreira, Itamar Balancin, Oscar |
| Copyright Year | 2010 |
| Description | Potentiodynamic and potentiostatic polarization measurements were conducted in 0.9% NaCl solution to investigate the localized corrosion susceptibility of two austenitic stainless steel biomaterials: a low nitrogen, according to ASTM F 138 - the metallic material most widely utilized today in orthopedic applications; and a nitrogen- and niobium-bearing stainless steel, according to ISO 5832-9, which has shown a promising potential as a substitute of the F 138 steel for more severe loading applications and longer times inside the human body. The polarization tests revealed that the ISO 5832-9 steel is more corrosion resistant than the F 138. The critical pitting potential of the ISO 5832-9 steel could not be observed in the cyclic polarization curve up to the value of potential corresponding to its transpassivity. The potentiostatic scratch test confirmed the superiority of the ISO 5832-9 steel, which heal the mechanically damaged passive film at applied potential as high as 800 mV (SCE). Scanning electron microscopy (SEM) examination confirmed the presence of corrosion pits - lacelike pits - in a stable growth stage on the surface of F 138 steel and the absence of such pits in the specimens of the ISO 5832-9 steel. The higher corrosion resistance of the latter is attributed to the increased stability of the passive film and the high tendency to repassivate, which, in turn, is favored by the presence of nitrogen in interstitial solid solution in the austenite of this type of steel. |
| Related Links | http://www.scielo.br/pdf/rem/v63n1/27.pdf |
| Ending Page | 166 |
| Page Count | 8 |
| Starting Page | 159 |
| ISSN | 03704467 |
| e-ISSN | 18070353 |
| DOI | 10.1590/s0370-44672010000100027 |
| Journal | Rem: Revista Escola de Minas |
| Issue Number | 1 |
| Volume Number | 63 |
| Language | English |
| Publisher | FapUNIFESP (SciELO) |
| Publisher Date | 2010-03-01 |
| Access Restriction | Open |
| Subject Keyword | Revista Escola de Minas Coatings and Films Electrochemical Behavior Stainless Steel Steel Biomaterials Two Austenitic Austenitic Stainless |
| Content Type | Text |
| Resource Type | Article |
| Subject | Waste Management and Disposal Geology Geochemistry and Petrology Economic Geology Materials Science |
