In this study the corrosion behavior of porous type(1) 316L stainless steel has been evaluated and compared to that of conventionally made wrought stainless steel. The corrosion behavior of this porous material was investigated by potentiodynamic anodic polarization, open-circuit potential measurements, and identification of corrosion products on the surface by x-ray photoelectron spectroscopic (XPS) analysis and scanning electron microscope (SEM) observations. The polarization studies indicated that the separation between the breakdown potential and the protection potential, ΔE = EB – EPP, increases, with decreasing pore size. The analysis of the surface film revealed the presence of nickel on the corroded surface. The reasons for the variation of the corrosion behavior with porosity have been examined. An attempt has been made to explain the mechanism of corrosion attack on porous stainless steels in chloride-containing solutions.

Subject
Steel surfaces, Materials, Iron, X-ray spectroscopy, Porosity, Pores, Corrosion behavior, Stainless steel, Nickel, Elements, Wrought metals, Electrolytes, Samples
National Association of Corrosion Engineers
1989
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