Influence of surface roughness on corrosion resistance of turned carbon steel parts Online publication date: Fri, 06-Oct-2006
by Nicolaos. D. Hassiotis, Georgios. P. Petropoulos
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 1, No. 2, 2006
Abstract: In this study, the relationship between corrosion resistance and topographic characteristics of machined surfaces of St37 and Ck60 carbon steels is investigated. Longitudinal turning was performed for combination of cutting conditions, leading to differing surface patterns. The surfaces, as machined and after the application of an accelerated alternate immersion corrosion test, were examined stereoscopically and studied using a multiparameter roughness analysis. It was revealed that the samples exhibited different corrosion behaviour according to the machining conditions and the type of steel considered. Close correlation between corrosion resistance and surface roughness parameters was evident, also allowing the introduction of a roughness index (Rlo/Rvo)Rt which is directly related to the weight loss due to corrosion. This fact is relevant to desirable corrosion control by design through the selection of appropriate machining parameters.
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