The microstructural effects of laser metal deposition on pitting corrosion of AISI 316L, AISI 431 and SAF 2507 stainless steels
Date
2022
Authors
Hatem, A.
Schulz, C.
Schlaefer, T.
Stanford, N.
Roccisano, A.
Hall, C.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference item
Citation
Presentation at the 2022 ACA Corrosion & Prevention, 2022
Statement of Responsibility
Conference Name
ACA Corrosion & Prevention 2022 (5 Jun 2022 - 8 Jun 2022 : Newcastle, NSW)
Abstract
This work compares the microstructure and corrosion resistance of additively manufactured AISI 316L, AISI 431, and SAF 2507 stainless steel samples fabricated by Laser Metal Deposition (LMD) technique. Equivalent wrought material counterparts were utilized as references. The corrosion behaviour was assessed by means of potentiodynamic polarization measurements and salt spray tests in a sodium chloride solution. The LMD materials presented differences in solidification mode and scale compared to its wrought counterpart. Samples presented small variations on the corrosion potentials and current densities. A comparatively wider passivation range was observed on all LMD samples. This was attributed to the marked effects LMD had on the microstructure. Salt spray test results demonstrated equivalent or superior pitting corrosion resistance of the additively manufactured stainless steel samples for exposure periods longer than 1000 hours.