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Title: Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys

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:
 [1] ;  [2] ;  [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois, Chicago, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Univ. of Illinois, Chicago, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Corrosion Engineering, Science and Technology
Additional Journal Information:
Journal Volume: 53; Journal Issue: 3; Journal ID: ISSN 1478-422X
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; stainless steel; sigma phase; Laves phase; potentiodynamic polarization; corrosion
OSTI Identifier:
1439854

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., 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. doi:10.1080/1478422X.2018.1443991.
Rahman, T., Ebert, W. L., and Indacochea, J. E.. 2018. "Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys". United States. doi:10.1080/1478422X.2018.1443991.
@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 = {2018},
month = {2}
}