Environmental resistance of oxide tags fabricated on 304L stainless steel via nanosecond pulsed laser irradiation

Journal Article · Sat Nov 14 00:00:00 EST 2015 · Surface and Coatings Technology

DOI:https://doi.org/10.1016/j.surfcoat.2015.11.021· OSTI ID:1238672

Lawrence, Samantha Kay ^[1]; Adams, David P. ^[2]; Bahr, David F. ^[1]; Moody, Neville R. ^[3]

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1. Purdue Univ., West Lafayette, IN (United States)
2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
3. Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Nanosecond pulsed laser irradiation was used to fabricate colored, mechanically robust oxide “tags” on 304L stainless steel. Immersion in simulated seawater solution, salt fog exposure, and anodic polarization in a 3.5% NaCl solution were employed to evaluate the environmental resistance of these oxide tags. Single layer oxides outside a narrow thickness range (~ 100–150 nm) are susceptible to dissolution in chloride containing environments. The 304L substrates immediately beneath the oxides corrode severely—attributed to Cr-depletion in the melt zone during laser processing. For the first time, multilayered oxides were fabricated with pulsed laser irradiation in an effort to expand the protective thickness range while also increasing the variety of film colors attainable in this range. Layered films grown using a laser scan rate of 475 mm/s are more resistant to both localized and general corrosion than oxides fabricated at 550 mm/s. Furthermore, in the absence of pre-processing to mitigate Cr-depletion, layered films can enhance environmental stability of the system.

• Research Organization: Sandia National Laboratories (SNL-CA), Livermore, CA (United States); Sandia National Laboratories, Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC04-94AL85000
• OSTI ID: 1238672
• Report Number(s): SAND--2015-10490J; 614686
• Journal Information: Surface and Coatings Technology, Journal Name: Surface and Coatings Technology Journal Issue: C Vol. 285; ISSN 0257-8972
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
77 NANOSCIENCE AND NANOTECHNOLOGY
environmental degradation
nanosecond pulsed laser irradiation
oxide coatings
stainless steel