Corrosion behavior of different building planes of selective laser melting 316L stainless steel in 0.1 M HCl solution

• DOI: 10.1016/j.jmrt.2024.01.078
• Publication Date: 2024-01-11T08:27:09Z
• Authors: Zhou Zou; Zhihong Liu; Lanlan Yang; Yanbing Tang; Yanxin Qiao; Daohua Lu
• Keywords: Selective Laser Melting; Passivation

This study aimed to investigate the impact of building planes on microstructure and corrosion behaviors 316L stainless steel (SS) manufactured using selective laser melting (SLM) when subjected a 0.1 M HCl solution. The investigation material behavior involved utilization wide array surface characterization techniques, as well various electrochemical measurements. findings were comparison with those obtained from commercially rolled SS (R SS). analysis revealed that XZ YZ displayed distinctive fish scale melt pool structure, while XY plane exhibited columnar structure. densities low-angle grain boundaries for different observed < XZ. SLM showing broader passivation region higher breakdown potential compared available R SS, especially planes. Meanwhile, passive film was more compact had lower carrier density. factors contributing these could be attributed sample containing an increased proportion O2−/OH− Cr2O3 in film. resulted formation thick dense film, which is particularly evident In addition, it nucleation mechanism films remained unchanged following process.