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Title: ANODIC BEHAVIOR OF ALLOY 22 IN HIGH NITRATE BRINES AT TEMPERATURES HIGHER THAN 100C

Abstract

Alloy 22 (N06022) may be susceptible to crevice corrosion in chloride solutions. Nitrate acts as an inhibitor to crevice corrosion. Several papers have been published regarding the effect of nitrate on the corrosion resistance of Alloy 22 at temperatures 100 C and lower. However, very little is known about the behavior of this alloy in highly concentrated brines at temperatures above 100 C. In the current work, electrochemical tests have been carried out to explore the anodic behavior of Alloy 22 in high chloride high nitrate electrolytes at temperatures as high as 160 C at ambient atmospheres. Even though Alloy 22 may adopt corrosion potentials in the order of +0.5 V (in the saturated silver chloride scale), it does not suffer crevice corrosion if there is high nitrate in the solution. That is, the inhibitive effect of nitrate on crevice corrosion is active for temperatures higher than 100 C.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Yucca Mountain Project, Las Vegas, Nevada
Sponsoring Org.:
USDOE
OSTI Identifier:
886560
Report Number(s):
UCRL-PROC-220305
MOL.20060517.0191 DC#47653; TRN: US200616%%1005
DOE Contract Number:
NA
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HASTELLOYS; BRINES; CORROSION RESISTANCE; CREVICE CORROSION; NITRATES; CHLORIDES; CORROSION INHIBITORS; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K

Citation Formats

G.O. LLEVBARE, J.C. ESTILL, A. YILMAZ, R.A. ETIEN, and G.A. HUST M.L. STUART. ANODIC BEHAVIOR OF ALLOY 22 IN HIGH NITRATE BRINES AT TEMPERATURES HIGHER THAN 100C. United States: N. p., 2006. Web. doi:10.2172/886560.
G.O. LLEVBARE, J.C. ESTILL, A. YILMAZ, R.A. ETIEN, & G.A. HUST M.L. STUART. ANODIC BEHAVIOR OF ALLOY 22 IN HIGH NITRATE BRINES AT TEMPERATURES HIGHER THAN 100C. United States. doi:10.2172/886560.
G.O. LLEVBARE, J.C. ESTILL, A. YILMAZ, R.A. ETIEN, and G.A. HUST M.L. STUART. Thu . "ANODIC BEHAVIOR OF ALLOY 22 IN HIGH NITRATE BRINES AT TEMPERATURES HIGHER THAN 100C". United States. doi:10.2172/886560. https://www.osti.gov/servlets/purl/886560.
@article{osti_886560,
title = {ANODIC BEHAVIOR OF ALLOY 22 IN HIGH NITRATE BRINES AT TEMPERATURES HIGHER THAN 100C},
author = {G.O. LLEVBARE and J.C. ESTILL and A. YILMAZ and R.A. ETIEN and G.A. HUST M.L. STUART},
abstractNote = {Alloy 22 (N06022) may be susceptible to crevice corrosion in chloride solutions. Nitrate acts as an inhibitor to crevice corrosion. Several papers have been published regarding the effect of nitrate on the corrosion resistance of Alloy 22 at temperatures 100 C and lower. However, very little is known about the behavior of this alloy in highly concentrated brines at temperatures above 100 C. In the current work, electrochemical tests have been carried out to explore the anodic behavior of Alloy 22 in high chloride high nitrate electrolytes at temperatures as high as 160 C at ambient atmospheres. Even though Alloy 22 may adopt corrosion potentials in the order of +0.5 V (in the saturated silver chloride scale), it does not suffer crevice corrosion if there is high nitrate in the solution. That is, the inhibitive effect of nitrate on crevice corrosion is active for temperatures higher than 100 C.},
doi = {10.2172/886560},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Apr 20 00:00:00 EDT 2006},
month = {Thu Apr 20 00:00:00 EDT 2006}
}

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