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Title: Modeling the Effects of Crevice Former, Particulates , and the Evolving Surface Profile in Crevice Corrosion

Abstract

Crevice corrosion may initiate in confined regions due to transport limitations, followed by an accumulation of a highly corrosive chemistry, capable of dissolving the metal. The metal and the crevice former surface roughness, the presence of particulates under the crevice former and the accumulation of solid corrosion products at the corroding site would significantly affect the current and potential distribution at the anode by increasing the ohmic potential drop. Most crevice corrosion models focus on a smooth walled crevice of uniform gap and do not account for the changing profile after crevice corrosion has been initiated. In this work we analyze the crevice (anodic) region and apply current and potential distribution models to examine the effects of the perturbed surface topography. The analysis focuses on three related issues: (1) the effects of surface roughness of the metal and the crevice former, (2) the effects of particulates under the crevice former, and (3) the evolution of the crevice profile with corrosion product accumulation at the active, anodic region.

Authors:
; ; ;
Publication Date:
Research Org.:
Yucca Mountain Project, Las Vegas, Nevada
Sponsoring Org.:
USDOE
OSTI Identifier:
899321
Report Number(s):
NA
MOL.20070129.0227, DC# 49966; TRN: US200709%%447
DOE Contract Number:  
NA
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CORROSION PRODUCTS; CREVICE CORROSION; PARTICULATES; ROUGHNESS; METALS; MATHEMATICAL MODELS

Citation Formats

A.S. Agarwal, U. Landau, X. Shan, and J.H. Payer. Modeling the Effects of Crevice Former, Particulates , and the Evolving Surface Profile in Crevice Corrosion. United States: N. p., 2006. Web. doi:10.2172/899321.
A.S. Agarwal, U. Landau, X. Shan, & J.H. Payer. Modeling the Effects of Crevice Former, Particulates , and the Evolving Surface Profile in Crevice Corrosion. United States. doi:10.2172/899321.
A.S. Agarwal, U. Landau, X. Shan, and J.H. Payer. Thu . "Modeling the Effects of Crevice Former, Particulates , and the Evolving Surface Profile in Crevice Corrosion". United States. doi:10.2172/899321. https://www.osti.gov/servlets/purl/899321.
@article{osti_899321,
title = {Modeling the Effects of Crevice Former, Particulates , and the Evolving Surface Profile in Crevice Corrosion},
author = {A.S. Agarwal and U. Landau and X. Shan and J.H. Payer},
abstractNote = {Crevice corrosion may initiate in confined regions due to transport limitations, followed by an accumulation of a highly corrosive chemistry, capable of dissolving the metal. The metal and the crevice former surface roughness, the presence of particulates under the crevice former and the accumulation of solid corrosion products at the corroding site would significantly affect the current and potential distribution at the anode by increasing the ohmic potential drop. Most crevice corrosion models focus on a smooth walled crevice of uniform gap and do not account for the changing profile after crevice corrosion has been initiated. In this work we analyze the crevice (anodic) region and apply current and potential distribution models to examine the effects of the perturbed surface topography. The analysis focuses on three related issues: (1) the effects of surface roughness of the metal and the crevice former, (2) the effects of particulates under the crevice former, and (3) the evolution of the crevice profile with corrosion product accumulation at the active, anodic region.},
doi = {10.2172/899321},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 21 00:00:00 EST 2006},
month = {Thu Dec 21 00:00:00 EST 2006}
}

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