Erosion-corrosion mapping of Fe in aqueous slurries: some views on a new rationale for defining the erosion-corrosion interaction

M.M. Stack, N. Pungwiwat

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

In studies of erosion-corrosion of materials in aqueous conditions, there have been various attempts to define regimes of interaction. Such regimes indicate whether erosion or corrosion may dominate the wastage mechanism. However, intermediate regimes in which corrosion and erosion interact with each other may lead to situations where the wastage is far greater than the sum of the processes acting separately. A common method of defining erosion-corrosion interactions has been to distinguish between the regime in which erosion enhances the corrosion rate (the so called "additive effect" because the corrosion contribution can be measured electrochemically and thus added to the erosion contribution to assess the overall wastage rate) and the regime where corrosion enhances erosion (the so-called "synergistic" effect). However, regimes of erosion-corrosion, where corrosion impedes the erosion are also of great importance mechanistically, and usually these are termed as exhibiting "negative synergism". Defining the conditions in which a transition from "positive" to "negative synergism" occurs, is useful in order to optimize the parameters to minimize the wastage rate. This paper reviews the rationale that has been used to define erosion-corrosion regimes in aqueous conditions as part of a study of the erosion-corrosion of Fe at various pHs. The mathematical definitions are discussed in relation to practical erosion-corrosion problems. In addition, a new "antagonistic" erosion-corrosion regime is proposed to properly define the concept of "negative synergism".
LanguageEnglish
Pages565-576
Number of pages11
JournalWear
Volume256
Issue number5
DOIs
Publication statusPublished - Mar 2004

Fingerprint

slurries
Slurries
erosion
Erosion
corrosion
Corrosion
interactions
Corrosion rate

Keywords

  • Erosion-corrosion
  • Synergistic effect
  • Antagonism
  • Maps
  • PH effects

Cite this

@article{446c3a93465048238aededd9cead2c02,
title = "Erosion-corrosion mapping of Fe in aqueous slurries: some views on a new rationale for defining the erosion-corrosion interaction",
abstract = "In studies of erosion-corrosion of materials in aqueous conditions, there have been various attempts to define regimes of interaction. Such regimes indicate whether erosion or corrosion may dominate the wastage mechanism. However, intermediate regimes in which corrosion and erosion interact with each other may lead to situations where the wastage is far greater than the sum of the processes acting separately. A common method of defining erosion-corrosion interactions has been to distinguish between the regime in which erosion enhances the corrosion rate (the so called {"}additive effect{"} because the corrosion contribution can be measured electrochemically and thus added to the erosion contribution to assess the overall wastage rate) and the regime where corrosion enhances erosion (the so-called {"}synergistic{"} effect). However, regimes of erosion-corrosion, where corrosion impedes the erosion are also of great importance mechanistically, and usually these are termed as exhibiting {"}negative synergism{"}. Defining the conditions in which a transition from {"}positive{"} to {"}negative synergism{"} occurs, is useful in order to optimize the parameters to minimize the wastage rate. This paper reviews the rationale that has been used to define erosion-corrosion regimes in aqueous conditions as part of a study of the erosion-corrosion of Fe at various pHs. The mathematical definitions are discussed in relation to practical erosion-corrosion problems. In addition, a new {"}antagonistic{"} erosion-corrosion regime is proposed to properly define the concept of {"}negative synergism{"}.",
keywords = "Erosion-corrosion, Synergistic effect, Antagonism, Maps, PH effects",
author = "M.M. Stack and N. Pungwiwat",
year = "2004",
month = "3",
doi = "10.1016/S0043-1648(03)00566-0",
language = "English",
volume = "256",
pages = "565--576",
journal = "Wear",
issn = "0043-1648",
number = "5",

}

Erosion-corrosion mapping of Fe in aqueous slurries: some views on a new rationale for defining the erosion-corrosion interaction. / Stack, M.M.; Pungwiwat, N.

In: Wear, Vol. 256, No. 5, 03.2004, p. 565-576.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Erosion-corrosion mapping of Fe in aqueous slurries: some views on a new rationale for defining the erosion-corrosion interaction

AU - Stack, M.M.

AU - Pungwiwat, N.

PY - 2004/3

Y1 - 2004/3

N2 - In studies of erosion-corrosion of materials in aqueous conditions, there have been various attempts to define regimes of interaction. Such regimes indicate whether erosion or corrosion may dominate the wastage mechanism. However, intermediate regimes in which corrosion and erosion interact with each other may lead to situations where the wastage is far greater than the sum of the processes acting separately. A common method of defining erosion-corrosion interactions has been to distinguish between the regime in which erosion enhances the corrosion rate (the so called "additive effect" because the corrosion contribution can be measured electrochemically and thus added to the erosion contribution to assess the overall wastage rate) and the regime where corrosion enhances erosion (the so-called "synergistic" effect). However, regimes of erosion-corrosion, where corrosion impedes the erosion are also of great importance mechanistically, and usually these are termed as exhibiting "negative synergism". Defining the conditions in which a transition from "positive" to "negative synergism" occurs, is useful in order to optimize the parameters to minimize the wastage rate. This paper reviews the rationale that has been used to define erosion-corrosion regimes in aqueous conditions as part of a study of the erosion-corrosion of Fe at various pHs. The mathematical definitions are discussed in relation to practical erosion-corrosion problems. In addition, a new "antagonistic" erosion-corrosion regime is proposed to properly define the concept of "negative synergism".

AB - In studies of erosion-corrosion of materials in aqueous conditions, there have been various attempts to define regimes of interaction. Such regimes indicate whether erosion or corrosion may dominate the wastage mechanism. However, intermediate regimes in which corrosion and erosion interact with each other may lead to situations where the wastage is far greater than the sum of the processes acting separately. A common method of defining erosion-corrosion interactions has been to distinguish between the regime in which erosion enhances the corrosion rate (the so called "additive effect" because the corrosion contribution can be measured electrochemically and thus added to the erosion contribution to assess the overall wastage rate) and the regime where corrosion enhances erosion (the so-called "synergistic" effect). However, regimes of erosion-corrosion, where corrosion impedes the erosion are also of great importance mechanistically, and usually these are termed as exhibiting "negative synergism". Defining the conditions in which a transition from "positive" to "negative synergism" occurs, is useful in order to optimize the parameters to minimize the wastage rate. This paper reviews the rationale that has been used to define erosion-corrosion regimes in aqueous conditions as part of a study of the erosion-corrosion of Fe at various pHs. The mathematical definitions are discussed in relation to practical erosion-corrosion problems. In addition, a new "antagonistic" erosion-corrosion regime is proposed to properly define the concept of "negative synergism".

KW - Erosion-corrosion

KW - Synergistic effect

KW - Antagonism

KW - Maps

KW - PH effects

UR - http://dx.doi.org/10.1016/S0043-1648(03)00566-0

U2 - 10.1016/S0043-1648(03)00566-0

DO - 10.1016/S0043-1648(03)00566-0

M3 - Article

VL - 256

SP - 565

EP - 576

JO - Wear

T2 - Wear

JF - Wear

SN - 0043-1648

IS - 5

ER -