Pitting corrosion of low-Cr austenitic stainless steels
- Dept. of Energy, Albany, OR (United States). Albany Research Center
The Albany Research Center has investigated the pitting corrosion resistance of experimental low-Cr stainless steels and several commercial stainless steels in chloride-containing aqueous and atmospheric environments. Previous research had shown the experimental alloys to be as corrosion resistant as commercial stainless steels in chloride-free acid environments. The alloys studied were Fe-8Cr-16Ni-5.5Si-1Cu-(0-1)Mo, 304 SS, and 316 SS. These alloys were examined by immersion and electrochemical tests in 3.5 wt. pct. NaCl and 6 wt.pct.FeCl{sub 3}. Results of these tests showed that the addition of one weight percent Mo improved the pitting resistance of the low-Cr alloy and that the Mo-containing experimental alloy was as resistant to pitting as the commercial alloys. Electrochemical tests did, however, show the experimental alloys to be slightly less resistant to pitting than the commercial alloys. Because of these results, the low-Cr alloy with one weight percent Mo and 304 SS were exposed for one year to a marine atmospheric environment on the coast of Oregon. The marine atmospheric corrosion resistance of the low-Cr alloy was found to be comparable to that for type 304 stainless steel.
- Research Organization:
- ARC (Albany Research Center (ARC), Albany, OR)
- Sponsoring Organization:
- U.S. Bureau of Mines; USDOE
- OSTI ID:
- 382597
- Report Number(s):
- DOE/ARC-1996-005; CONF-960389--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
COASTAL REGIONS
COPPER ALLOYS
CURRENT DENSITY
ELECTRIC POTENTIAL
ELECTROCHEMICAL CORROSION
EXPERIMENTAL DATA
FIELD TESTS
IRON BASE ALLOYS
IRON CHLORIDES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
OREGON
PITTING CORROSION
SILICON ALLOYS
SODIUM CHLORIDES
WEIGHT MEASUREMENT
atmospheric corrosion
chloride
localized corrosion
low chromium
low-cr
pitting
stainless steel