AES analysis of stainless steel corroded in saline, in serum and in vivo

Abstract

Auger electron spectroscopic (AES) studies were conducted to examine the surface film of stainless steel specimens which had been subjected to passive and anodic corrosion in vitro and in vivo. Anodic corrosion was accelerated by the application of a +500 mV (SCE) potential for 30 minutes. Experiments performed in 0.9% saline indicated little alteration in the nature of the surface film compared to a freshly prepared control specimen. Auger analysis of specimens in 10% serum or in vivo revealed that passive film thickness was dependent on the corrosive environment. The films of specimens immersed under freely corroding conditions in 10% serum or in vivo were similar to the control film. Accelerated corrosion performed in 10% calf serum resulted in significant film thickening. The thickest films were from accelerated corrosion in vivo. The mechanism for the altered surface films produced by corrosion in vivo or in serum as compared to saline needs to be investigated further.

Electrochemical study of Type 304 and 316L stainless steels in simulated body fluids and cell cultures

“…Roscoe et al [1] claimed that the increased metal dissolution of stainless steel was due to the adsorption of BSA onto the surface, evidenced from electrochemical impedance study. Other works using Auger electron spectroscopy (AES) revealed that thicker films (carbon-rich) formed on stainless steels that were immersed in 10% serum than in 0.9% saline [8,9]. The carbon layer was also present when the stainless steel was anodically polarised at 500 mV (standard calomel electrode), and the concentration and film thickness increased with the polarising time.…”

The Corrosion Resistance of Composite Arch Wire Laser-Welded By NiTi Shape Memory Alloy and Stainless Steel Wires with Cu Interlayer in Artificial Saliva with Protein

“…Thus BSA could build a pellicle layer which can serve as a diffusion barrier for ionic components and reduce susceptibility to pitting attack. In vitro, proteins have been reported to increase corrosion for SS and pure metals 21,22. Metal-protein surface complex exposure to human plasma fibronectin built by Endo could reduce the corrosion rate of Nitinol.…”

Corrosion rates of stainless steel under shear stress measured by a novel parallel‐plate flow chamber

“…Past research supports the concept that biological molecules such as proteins and microbes also alter corrosion of the alloy 6, 11–21. Separately, static loading stresses and electrolytes with added proteins have been found to reduce the corrosion resistance of implants 6, 21–23.…”