Electrochemical Studies of Passive Film Stability on Fe49.7Cr17.7Mn1.9Mo7.4W1.6B15.2C3.8Si2.4 Amorphous Metal in Seawater at 90oCElectrochemical Studies of Passive Film Stability on °° Amorphous Metal in Seawater at 90°C
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Case Western Reserve Univ., Cleveland, OH (United States)
- Univ. of Wisconsin, Madison, WI (United States)
- Univ. of California, Davis, CA (United States).
- Univ. of California, Davis, CA (United States)
- The NanoSteel Co., Idaho Falls, ID (United States)
- Strategic Analysis, Arlington, VA (United States)
An iron-based amorphous metal, Fe49.7Cr17.7Mn1.9Mo7.4W1.6B15.2C3.8Si2.4 (SAM2X5), with very good corrosion resistance was developed. This material was prepared as a melt-spun ribbon, as well as gas atomized powder and a thermal-spray coating. During electrochemical testing in several environments, including seawater at 90°C, the passive film stability was found to be comparable to that of high-performance nickel-based alloys, and superior to that of stainless steels, based on electrochemical measurements of the passive film breakdown potential and general corrosion rates. This material also performed very well in standard salt fog tests. Chromium (Cr), molybdenum (Mo) and tungsten (W) provided corrosion resistance, and boron (B) enabled glass formation. The high boron content of this particular amorphous metal made it an effective neutron absorber, and suitable for criticality control applications. This material and its parent alloy maintained corrosion resistance up to the glass transition temperature, and remained in the amorphous state during exposure to relatively high neutron doses.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Civilian and Radioactive Waste Management (OCRWM); Defense Advanced Research Projects Agency (DARPA), Defense Science Office (DSO)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 1046111
- Report Number(s):
- UCRL-TR--230335
- Country of Publication:
- United States
- Language:
- English
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Thu May 10 00:00:00 EDT 2007
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OSTI ID:1018786
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Sun Apr 09 20:00:00 EDT 2017
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Sat Apr 21 20:00:00 EDT 2007
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