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

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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 ... continued below

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LLEVBARE, G.O.; ESTILL, J.C.; YILMAZ, A.; ETIEN, R.A. & STUART, G.A. HUST M.L. April 20, 2006.

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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.

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  • Report No.: UCRL-PROC-220305
  • Grant Number: NA
  • DOI: 10.2172/886560 | External Link
  • Office of Scientific & Technical Information Report Number: 886560
  • Archival Resource Key: ark:/67531/metadc876948

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  • April 20, 2006

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 2, 2016, 8:12 p.m.

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LLEVBARE, G.O.; ESTILL, J.C.; YILMAZ, A.; ETIEN, R.A. & STUART, G.A. HUST M.L. ANODIC BEHAVIOR OF ALLOY 22 IN HIGH NITRATE BRINES AT TEMPERATURES HIGHER THAN 100C, report, April 20, 2006; Las Vegas, Nevada. (digital.library.unt.edu/ark:/67531/metadc876948/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.