Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys
Abstract
Alloys were made by alloying 5, 10, 15, 17.5, and 20 wt % Mo with Type 316L stainless steel. Sigma phases containing 21–29 wt % Mo formed along the austenite grain boundaries with the addition of 5 wt % Mo and increased with additions up to 15 wt % Mo, but they decreased with further additions. Laves phases containing 33–40 wt % Mo co-precipitated at additions of 10 wt % Mo which increased with further Mo increases. The corrosion resistance, assessed by potentiodynamic polarisation in a 10 mM NaCl solution adjusted to pH 4, increased relative to Type 316L for alloys made with 5 and 10 wt % added Mo, but decreased with further additions due to preferential corrosion of the Laves phase. The alloy made with 10 wt % added Mo had the highest corrosion resistance due primarily to the high Mo content of the austenite.
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois, Chicago, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Univ. of Illinois, Chicago, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1439854
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Corrosion Engineering, Science and Technology
- Additional Journal Information:
- Journal Volume: 53; Journal Issue: 3; Journal ID: ISSN 1478-422X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; stainless steel; sigma phase; Laves phase; potentiodynamic polarization; corrosion
Citation Formats
Rahman, T., Ebert, W. L., and Indacochea, J. E. Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys. United States: N. p., 2018.
Web. doi:10.1080/1478422X.2018.1443991.
Rahman, T., Ebert, W. L., & Indacochea, J. E. Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys. United States. https://doi.org/10.1080/1478422X.2018.1443991
Rahman, T., Ebert, W. L., and Indacochea, J. E. Wed .
"Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys". United States. https://doi.org/10.1080/1478422X.2018.1443991. https://www.osti.gov/servlets/purl/1439854.
@article{osti_1439854,
title = {Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys},
author = {Rahman, T. and Ebert, W. L. and Indacochea, J. E.},
abstractNote = {Alloys were made by alloying 5, 10, 15, 17.5, and 20 wt % Mo with Type 316L stainless steel. Sigma phases containing 21–29 wt % Mo formed along the austenite grain boundaries with the addition of 5 wt % Mo and increased with additions up to 15 wt % Mo, but they decreased with further additions. Laves phases containing 33–40 wt % Mo co-precipitated at additions of 10 wt % Mo which increased with further Mo increases. The corrosion resistance, assessed by potentiodynamic polarisation in a 10 mM NaCl solution adjusted to pH 4, increased relative to Type 316L for alloys made with 5 and 10 wt % added Mo, but decreased with further additions due to preferential corrosion of the Laves phase. The alloy made with 10 wt % added Mo had the highest corrosion resistance due primarily to the high Mo content of the austenite.},
doi = {10.1080/1478422X.2018.1443991},
journal = {Corrosion Engineering, Science and Technology},
number = 3,
volume = 53,
place = {United States},
year = {Wed Feb 28 00:00:00 EST 2018},
month = {Wed Feb 28 00:00:00 EST 2018}
}
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