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Title: 2016 Corrosion-Aqueous GRC/GRS

Abstract

Final Conference Program & Registration List

Authors:
Publication Date:
Research Org.:
Gordon Research Conferences
Sponsoring Org.:
USDOE
OSTI Identifier:
1329244
Report Number(s):
Final Report GRC DOE 5883
DOE Contract Number:
SC0015883
Resource Type:
Conference
Resource Relation:
Conference: 2016 Corrosion-Aqueous GRC/GRS, Colby-Sawyer College, New London, NH, July 9-15,2016
Country of Publication:
United States
Language:
English

Citation Formats

Virtanen, Sannakaisa. 2016 Corrosion-Aqueous GRC/GRS. United States: N. p., 2016. Web.
Virtanen, Sannakaisa. 2016 Corrosion-Aqueous GRC/GRS. United States.
Virtanen, Sannakaisa. 2016. "2016 Corrosion-Aqueous GRC/GRS". United States. doi:. https://www.osti.gov/servlets/purl/1329244.
@article{osti_1329244,
title = {2016 Corrosion-Aqueous GRC/GRS},
author = {Virtanen, Sannakaisa},
abstractNote = {Final Conference Program & Registration List},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 7
}

Conference:
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  • Aqueous corrosion and corrosion-sensitive embrittlement of iron aluminides were characterized as functions of environment, alloying content, notch sensitivity, and strain rate. Polarization resistance and cyclic anodic polarization evaluations were performed in 3.5 wt % NaCl, 200 ppM Cl{sup {minus}} (pH = 4), and 1 N NaOH solutions. In the mild acid-chloride solution [200 ppM Cl{sup {minus}} (pH = 4)], the pitting-corrosion resistance of the new lean-aluminum iron aluminides (FAP-Y and CM-Mo) was comparable to that of the Fe{sub 3}Al-based FAL-Mo. In the higher-chloride 3.5 wt % NaCl, the resistance of CM-Mo was slightly less but FAP-Y showed quite similar behaviormore » to FAL-Mo. In 1 N NaOH solution, all materials exhibited ideal passive behavior. Under slow-strain-rate test conditions in the mild acid-chloride electrolyte, prior work had shown the ductilities (% elongations) of Fe{sub 3}Al-based materials to be {approximately}7% and {approximately}1% at the freely-corroding and hydrogen-charging potentials, respectively. Present studied on the lean-aluminum materials have shown the ductilities to be {approximately}17% and {approximately}5%, respectively. Thus, the present results indicate that these new materials have reasonably-good aqueous-corrosion properties in chloride environments and significantly-enhanced ductilities under aqueous corrosion conditions. The strain rate and notch sensitivities of high-aluminum iron aluminide (FA-129) were investigated by performing slow-strain-rate tests. The notch sensitivity was independent of strain rate and the notch sensitivity in the aqueous environment was similar to that in air.« less
  • Humid-air and aqueous general and pitting corrosion models (including their uncertainties) for the carbon steel outer containment barrier were developed using the corrosion data from literature for a suite of cast irons and carbon steels which have similar corrosion behaviors to the outer barrier material. The corrosion data include the potential effects of various chemical species present in the testing environments. The atmospheric corrosion data also embed any effects of cyclic wetting and drying and salts that may form on the corroding specimen surface. The humid-air and aqueous general corrosion models are consistent in that the predicted humid-air general corrosionmore » rates at relative humidities between 85 and 100% RH are close to the predicted aqueous general corrosion rates. Using the expected values of the model parameters, the model predicts that aqueous pitting corrosion is the most likely failure mode for the carbon steel outer barrier, and an earliest failure (or initial pit penetration) of the 100-mm thick barrier may occur as early as about 500 years if it is exposed continuously to an aqueous condition at between 60 and 70{degrees}C.« less