Electrochemical Effects of S Accumulation on Ion-implanted Alloy 22 in 1 M NaCl Solutions
The objective of this study was to examine the effects of high levels of S in the near-surface region on the passivity of Alloy 22, a corrosion resistant Ni-Cr-Mo alloy, in deaerated 1 M NaCl solution. Near-surface concentrations of S up to 2 at.% were achieved in Alloy 22 test specimens by implanting them with S. The S-implanted samples were then evaluated in short-term electrochemical tests in the salt solution and subsequently analyzed with X-ray Photoelectron Spectroscopy (XPS) for film thickness and composition. Specimens tested included non-implanted and annealed Alloy 22 samples, samples implanted with S, and “blanks” implanted with Ar as an ion that would simulate the “damage” of S implantation without the chemical effect. A sample of S-implanted Alloy 22 was also exposed to solution for 29 days and analyzed for evidence of S accumulation at the surface over longer times
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 908199
- Report Number(s):
- PNNL-SA-46733; CRRSAA; 7993; DF0961000; TRN: US200722%%545
- Journal Information:
- Corrosion Science, 49(6):2497-2511, Vol. 49, Issue 6; ISSN 0010-938X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Evaluation of an Oxide Layer on NI-CR-MO-W Alloy Using Electrochemical Impedance Spectroscopy and Surface Analysis
A surface analytical study of the influence of nitrogen on the electrochemical passivation of high Ni stainless steels and thin Mo-Ni films