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Title: Electrochemical Corrosion Testing of Borated Stainless Steel Alloys

Abstract

The Department of Energy Office of Civilian Radioactive Waste Management has specified borated stainless steel manufactured to the requirements of ASTM A 887-89, Grade A, UNS S30464, to be the material used for the fabrication of the fuel basket internals of the preliminary transportation, aging, and disposal canister system preliminary design. The long-term corrosion resistance performance of this class of borated materials must be verified when exposed to expected YMP repository conditions after a waste package breach. Electrochemical corrosion tests were performed on crevice corrosion coupons of Type 304 B4 and Type 304 B5 borated stainless steels exposed to single postulated in-package chemistry at 60°C. The results show low corrosion rates for the test period

Authors:
;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - EM
OSTI Identifier:
912469
Report Number(s):
INL/EXT-07-12633
TRN: US0800414
DOE Contract Number:
DE-AC07-99ID-13727
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 - MATERIALS SCIENCE, 37 - INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AGING; ALLOYS; CHEMISTRY; CONTAINERS; CORROSION; CORROSION RESISTANCE; CREVICE CORROSION; DESIGN; ELECTROCHEMICAL CORROSION; FABRICATION; PERFORMANCE; RADIOACTIVE WASTE MANAGEMENT; STAINLESS STEELS; TESTING; WASTES; borated stainless steels; corrosion testsing; electrochemical testing; office of civilian radioactive waste management

Citation Formats

lister, tedd e, and Mizia, Ronald E. Electrochemical Corrosion Testing of Borated Stainless Steel Alloys. United States: N. p., 2007. Web. doi:10.2172/912469.
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lister, tedd e, & Mizia, Ronald E. Electrochemical Corrosion Testing of Borated Stainless Steel Alloys. United States. doi:10.2172/912469.
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lister, tedd e, and Mizia, Ronald E. Tue . "Electrochemical Corrosion Testing of Borated Stainless Steel Alloys". United States. doi:10.2172/912469. https://www.osti.gov/servlets/purl/912469.
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@article{osti_912469,
title = {Electrochemical Corrosion Testing of Borated Stainless Steel Alloys},
author = {lister, tedd e and Mizia, Ronald E},
abstractNote = {The Department of Energy Office of Civilian Radioactive Waste Management has specified borated stainless steel manufactured to the requirements of ASTM A 887-89, Grade A, UNS S30464, to be the material used for the fabrication of the fuel basket internals of the preliminary transportation, aging, and disposal canister system preliminary design. The long-term corrosion resistance performance of this class of borated materials must be verified when exposed to expected YMP repository conditions after a waste package breach. Electrochemical corrosion tests were performed on crevice corrosion coupons of Type 304 B4 and Type 304 B5 borated stainless steels exposed to single postulated in-package chemistry at 60°C. The results show low corrosion rates for the test period},
doi = {10.2172/912469},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}
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Technical Report:
View Technical Report
DOI:  10.2172/912469
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    The Department of Energy Office of Civilian Radioactive Waste Management has specified borated stainless steel manufactured to the requirements of ASTM A 887-89, Grade A, UNS S30464, to be the material used for the fabrication of the fuel basket internals of the preliminary transportation, aging, and disposal canister system preliminary design. The long-term corrosion resistance performance of this class of borated materials must be verified when exposed to expected YMP repository conditions after a waste package breach. Electrochemical corrosion tests were performed on crevice corrosion coupons of Type 304 B4 and Type 304 B5 borated stainless steels exposed to singlemore » postulated in-package chemistry at 60°C. The results show low corrosion rates for the test period« less

  • ;
    BS>The corrosion of type 304 stainless steel in water containing boric acid at 600 deg F and 2000 psig and at a flowvelocity of seven feet per second was investigated as a function of boron concentration and of alkaliknity. At a boron concentration of 39 ppm and at a pH value of 10, controlled with lithium hydroxide, no trend of corrosive attack with time was found after the first tw0 days. At a concentration of 41 ppm boron wlth no pH control (pH = 6.9), a regression tyoe equation of the form Y= A + B log (t), was foundmore » to express the relationship between corrosive attack and exposure teme. A similiar relationship was found at 1600 ppm boron withthe pH value maintained at 10 using lithium hydroxide. No evidence of raicrostructural attack was observed on coupon specimens under any of the conditions tested. The effects of surface finish and of position were studied. The effect of orientation of the rolling directon of coupon specimens with respect to the direction of fluid flow was also investigsted. (auth)« less

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    The corrosion behavior of irradiated and unirradiated stressed stainless steel containing minor natural B additions was studied in static 600 deg F water containing 10 g/l of boric acid. Alloys of AISI Type 304 stainless steel containing 0, 0.03, and 0.05 wt % B were investigated. Descaled metal losses after 1000 hr of exposure ranged from 6 to 30 mg/dm/sup 2/ for irradiated and unirradiated specimens of the alloys tested. These specimens were free of selective attack. The corrosion resistance of the alloys tested was essentially the same regardless of the irradiation dosage before corrosion (9.6 x 10/sup 19/ nvtmore » thermal and 3.58 x 10/sup 18/ nvt fast). No differences were observed in amount of attack in 600 deg F borated water for exposure times of 100 and 1000 hr. The attack under the test conditions appears no more severe than that reported for unstressed unirradiated austenitic stainless steels exposed to neutral or slightly alkaline high-purity water. (auth)« less

  • Electrochemical techniques can be used to predict the corrosion characteristics of a metal in a specific environment. The basic electrochemical principles, experimental techniques, and a detailed study of their use in characterizing the corrosion behavior of a particular 303 stainless steel are presented. This metal is the material of construction in a weapons component that comes in contact with 416 SS and the explosive TATB. The results of the electrochemical corrosion investigation indicated that at room temperature, in a nitrogen atmosphere, using chloride-free TATB, the introduction of moisture into the system will not promote significant corrosion, and the corrosive influencesmore » of materials which contact the 303 SS are negligible. The good corrosion characteristics of 303 SS are lost only when it is exposed to mobile chloride ion, which causes serious pitting/crevice corrosion. The effects of various 303 SS surface finishes upon chloride corrosion resistance were examined; it was shown that a passivation treatment provided only limited protection from chloride attack, and that pitting tended to begin in regions of rougher surface finish. Suggestions for improving the corrosion properties of the system are advanced. 3 refs., 10 figs.« less

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