Corrosion behavior and mechanism of laser powder bed fusion produced CoCrW in an acidic NaCl solution

P. Qin, L. Y. Chen, Y. J. Liu, C. H. Zhao, Y. J. Lu, H. Sun, L. C. Zhang

Research output: Contribution to journalArticlepeer-review

11 Citations (Web of Science)

Abstract

The corrosion behavior and mechanism of the laser powder bed fusion (L-PBF) produced CoCrW were investigated in 0.9 wt% NaCl solution with a pH of 2. The corrosion resistance of the alloy increases after 28 days of immersion because of the formed oxide film, which results in the increased corrosion potential and the decreased passivation current density on the potentiodynamic polarization test. The corrosion mechanism of the L-PBF-produced CoCrW could be explained by the melt pool formed from the laser melting process, that the melt pools were “shrinking” by the formation and dissolution of the oxide film.

Original languageEnglish
Article number110999
Number of pages13
JournalCorrosion Science
Volume213
DOIs
Publication statusPublished - 1 Apr 2023
Externally publishedYes

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