Microstructural features contributing to macroscopic corrosion: The role of oxide inclusions on the corrosion properties of additively manufactured 316L stainless steel

M. J.K. Lodhi; A. D. Iams; E. Sikora; T. A. Palmer

doi:10.1016/j.corsci.2022.110354

Microstructural features contributing to macroscopic corrosion: The role of oxide inclusions on the corrosion properties of additively manufactured 316L stainless steel

M. J.K. Lodhi, A. D. Iams, E. Sikora, T. A. Palmer

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

The electrochemical behavior of additively manufactured 316L stainless steel produced by argon and nitrogen atomized powder feedstock was studied in artificial sea water. A combination of computational thermodynamic calculations and experimental validation demonstrated that subtle differences in chemical composition of the powders led to the argon atomized material having more oxide inclusions compared to the nitrogen atomized material, which in turn resulted in higher susceptibility to localized corrosion. Additionally, improved electrochemical response of the additively manufactured materials relative to the wrought 316L was attributed to the passive films’ enrichment in chromium oxide.

Original language	English (US)
Article number	110354
Journal	Corrosion Science
Volume	203
DOIs	https://doi.org/10.1016/j.corsci.2022.110354
State	Published - Jul 15 2022

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
General Materials Science

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abstract = "The electrochemical behavior of additively manufactured 316L stainless steel produced by argon and nitrogen atomized powder feedstock was studied in artificial sea water. A combination of computational thermodynamic calculations and experimental validation demonstrated that subtle differences in chemical composition of the powders led to the argon atomized material having more oxide inclusions compared to the nitrogen atomized material, which in turn resulted in higher susceptibility to localized corrosion. Additionally, improved electrochemical response of the additively manufactured materials relative to the wrought 316L was attributed to the passive films{\textquoteright} enrichment in chromium oxide.",

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AB - The electrochemical behavior of additively manufactured 316L stainless steel produced by argon and nitrogen atomized powder feedstock was studied in artificial sea water. A combination of computational thermodynamic calculations and experimental validation demonstrated that subtle differences in chemical composition of the powders led to the argon atomized material having more oxide inclusions compared to the nitrogen atomized material, which in turn resulted in higher susceptibility to localized corrosion. Additionally, improved electrochemical response of the additively manufactured materials relative to the wrought 316L was attributed to the passive films’ enrichment in chromium oxide.

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Microstructural features contributing to macroscopic corrosion: The role of oxide inclusions on the corrosion properties of additively manufactured 316L stainless steel

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