Abstract
The pitting corrosion of welded joints of lean duplex stainless steel (LDSS) UNS S32304 was studied. LDSS S32304 thick plates were welded by different processes commonly employed in the manufacture of equipment and piping: shielded metal arc welding, gas metal arc welding, and flux cored arc welding. The electrochemical behavior of different weldment zones (fusion zone, base metal, and heat affected zone (HAZ)) was characterized both independently, using an electrochemical microcell, and together by testing the whole welded area. The electrochemical testing was performed in acidified glycerin, a process fluid of the biodiesel industry. The HAZ was the most susceptible zone for pitting corrosion for all samples. The results were correlated to the microstructural features of the materials. Finally, the results from the microcell and whole weld approaches were compared. According to the results, the gas metal arc welding process with 2209 as filler metal was found to be the optimum for application of 2304 duplex stainless steels in the acidified glycerin environment.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
