Effect of surface mechanical attrition treatment on stainless steel corrosion

Abstract

Surface mechanical attrition treatment (SMAT) is a unique method for the nanoscale refinement of a surface grain structure without changing the alloy chemical composition. Herein, the effect of SMAT on the corrosion resistance of 316L stainless steel in artificial sea water used as a corrosive medium has been investigated. As a result, a passive film and a nanostructured layer were formed on the SMAT-processed 316L stainless steel surface, which considerably increased its corrosion resistance during short-term testing. However, after a long-term exposure to the corrosive medium, the treated sample exhibited deterioration of its corrosion properties because of the micro-strain build-up and the presence of defects in the surface layer. The findings of this work suggest that SMAT can be potentially used for providing short-term corrosion protection to stainless steel objects immersed in aqueous saline media.

Biological Corrosion Resistance and Osteoblast Response of 316LVM Polished Using Electrolytic Plasma

“…The Nyquist plots characterize the relationships between the real and imaginary parts of the impedance. In these plots, only single semi-circular capacitance is shown for each sample, indicating the existence of one time constant [42]. In comparison with the smaller diameter of the untreated samples, a much larger loop diameter was observed in the EPP samples.…”

Ultrasonic Surface Rolling Process: Properties, Characterization, and Applications

“…Surface strengthening by different severe plastic deformation (SPD) methods has been widely perceived to enhance surface mechanical properties [1]. Researchers have used SPD by shot peening [2,3], severe shot peening (SSP) [4,5], ultrasonic impact peening [6,7], ultrasonic shot peening (USP) [8,9], laser shock peening [10,11], direct and indirect laser shock surface patterning (LSSP) [12,13], surface mechanical attrition treatment (SMAT) [14,15], and deep cold rolling (DCR) [16]. These surface SPD techniques could induce residual compressive stress (RCS) and closure of existing microcracks and microcavities on the surface [17][18][19][20].…”