INVESTIGATION OF CORROSION BEHAVIORS OF A SUPER DUPLEX STAINLESS STEEL 2507 WELD IN CHLORIDE SOLUTION

Rahul N R, Abhishek Abrol

Abstract: In this paper work, its cover the important factors of material and environmental conditions on decomposition of super duplex stainless steels in chloridecontent were studied. Variations in the SDSS structural changes by heat treatment and cyclic heat treatmentsat 600°C were investigated in terms of deviations in the proportion of austenite and ferrite segments, phase morphology and intermetallic precipitation using SEM. Alloy structure and chemical composition of weldment and annealed weldment in chloride solution composition was also found to affect the corrosion performance and passivation of SDSS. Corrosion rates and susceptibility of DSS was observed with addition of chloride solutions.The result obtained after these experiments will have an important influence in relations of recognizing the composite structures, manufacturemethods, microstructures, and environmental situations that may be help to reduce to mitigate decomposition of SDSS in chloride solutions on weld regions.

Keywords: Super Duplex steel 2507, Scanning Electrode Microscope, Filler material, Cyclic Heat Treatment , GTA welding, Pitting corrosion.

DOI: https://doi.org/10.15623/ijret.2016.0505043