Use of in situ Raman spectroelectrochemical technique to explore atmospheric corrosion in marine-relevant environments

Journal Article · 15 June 2020 · Electrochemistry Communications

DOI: https://doi.org/10.1016/j.elecom.2020.106768 · OSTI ID:1639055

Katona, Ryan Michael ^[1]; Kelly, Robert G. ^[2]; Bryan, Charles R. ^[3]; Schaller, Rebecca ^[3]; Knight, Andrew William ^[3]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Virginia, Charlottesville, VA (United States)
2. Univ. of Virginia, Charlottesville, VA (United States)
3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Here, for the first time, we demonstrate the use of an in situ spectroelectrochemical Raman technique to explore simulated atmospheric corrosion scenarios with a variable boundary layer thickness (δ). The effects of solution flow rate on oxygen concentration and δ were explored. It was found solution regeneration is necessary to prevent oxygen depletion in the Raman cell. It was further shown that by increasing the solution flow rate, the effective δ decreases and allows for the investigation of atmospheric corrosion scenarios. Finally, the technique developed was utilized to explore the effect of precipitation on the cathodic behavior of SS304L in dilute MgCl₂. During cathodic polarization, evidence supports previous observations that magnesium hydroxide species are kinetically favored over the thermodynamically predicted magnesium carbonate.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• Grant/Contract Number: AC04-94AL85000
• OSTI ID: 1639055
• Alternate ID(s): OSTI ID: 1770258
• Report Number(s): SAND2020--6232J; {686764,"Journal ID: ISSN 1388-2481"}
• Journal Information: Electrochemistry Communications, Journal Name: Electrochemistry Communications Vol. 118; ISSN 1388-2481
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English