Effect of Saline Medium on Corrosion and Erosion-Corrosion of Surface Treated Low Carbon Steel

Abstract

Abstract:The research investigates the effect of the surface treatment carbonization, nitriding and carbonitriding on the corrosion and erosion-corrosion oflow carbon steel in saline medium.Micro-hardness testing using the Vickers hardness method was applied to all samples before and after surface treatment of carbonization, nitriding and carbonitriding. Steel samples were immersed once in a saline bath as an medium for the corrosion, and once in saline with1% wt. SiO 2 as an medium for the erosion-corrosion. The immersions took place for different periods of time for120, 240, 360 and 480hr. The results of the corrosion and erosion-corrosion testing showed occurrence of corrosion and erosion-corrosion on the surface of the tested samplesevident byweight loss asmeasuredexpressed as g/cm 2 .Comparison between the results of the corrosion and the erosion-corrosion testing, was carriedby out by analyzing weight loss results. Results show that the surface carbonitriding treatment offers the best resistance to corrosion and erosion-corrosion.