Title: Influence of surface roughness on corrosion resistance of turned carbon steel parts

Authors: Nicolaos. D. Hassiotis, Georgios. P. Petropoulos

Addresses: Department of Mechanical and Industrial Engineering, University of Thessaly, Pedion Areos, Volos 383 34, Greece. ' Department of Mechanical and Industrial Engineering, University of Thessaly, Pedion Areos, Volos 383 34, Greece

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.

Keywords: turning; surface topography; roughness parameters; accelerated corrosion tests; carbon steels; surface roughness; corrosion resistance; corrosion control; machining parameters.

DOI: 10.1504/IJMMM.2006.011067

International Journal of Machining and Machinability of Materials, 2006 Vol.1 No.2, pp.202 - 212

Published online: 06 Oct 2006 *

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