Enhancing corrosion resistance of lightweight metal alloys through laser shock peening

Huang, Wuji; Leister, Brett M.; Shen, Ninggang; Mckee, Austin; Mubeen, Syed; Bonheyo, George T.; Rohatgi, Aashish; Ding, Hongtao

doi:10.2351/7.0001541

Enhancing corrosion resistance of lightweight metal alloys through laser shock peening

Journal Article · Tue Oct 08 00:00:00 EDT 2024 · Journal of Laser Applications

DOI:https://doi.org/10.2351/7.0001541· OSTI ID:2477590

^[1]; Leister, Brett M. ^[2]; Shen, Ninggang ^[3]; ^[1]; Mubeen, Syed ^[1]; ^[4]; ^[4]; ^[1]

University of Iowa, Iowa City, IA (United States)
Naval Surface Warfare Center (NSWC), Bethesda, MD (United States)
Tesla, Inc., Deer Creek, CA (United States)
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

In this study, we investigated the effects of laser shock peening (LSP) on the corrosion resistance of lightweight metal alloys, specifically AA6061 and AZ31. LSP was performed underwater, using a nanosecond pulse laser and without using a protective coating or layer on the workpiece. The corrosion behaviors of these alloys were analyzed through electrochemical tests, including open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization measurements. The results demonstrated that LSP significantly improved the polarization resistance, and higher laser power intensities led to increased corrosion resistance and reduced corrosion rates. This enhancement in anti-corrosion performance is attributed to the formation of a protective oxide layer on the surface, acting as a barrier against corrosion. In conclusion, the findings underscore the potential of laser surface treatment as a viable technique for enhancing the corrosion resistance of lightweight metal alloys.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Water Power Technologies Office; National Science Foundation (NSF); ONR Evaluation of Laser Peening for Propulsion Shafting

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 2477590

Report Number(s):: PNNL-SA--200120

Journal Information:: Journal of Laser Applications, Journal Name: Journal of Laser Applications Journal Issue: 4 Vol. 36; ISSN 1042-346X

Publisher:: AIP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
Alloys
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Enhancing corrosion resistance of lightweight metal alloys through laser shock peening

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