Electrochemical corrosion behavior of AISI 409L stainless steel aluminized by hot-dip coating method in automotive exhaust gas solution

Min Jun Kim; Seok Ho Woo; Jung Gu Kim

doi:10.2320/matertrans.M2015134

Electrochemical corrosion behavior of AISI 409L stainless steel aluminized by hot-dip coating method in automotive exhaust gas solution

Min Jun Kim
, Seok Ho Woo
, Jung Gu Kim

Department of Advanced Materials Science and Engineering

Sungkyunkwan University

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

This paper focuses on the pitting resistance of hot-dip aluminized (HDA) stainless steel after the depletion of the coating layer formed in the exhaust condensed solution. HDA stainless steel is composed of a coating layer, an interdiffusion layer, and a substrate. In the interdiffusion layer which is mainly composed of Al₇(Fe,Cr)₂Si and (Fe,Cr)(Al,Si)₃, microcracks were observed in the (Fe,Cr)(Al,Si)₃ layer. From electrochemical tests, the corrosion potential of the Al-10Si coating-removed 409L is higher than that of the interdiffusion layer-removed 409L. The pit depth of the substrate (anode) exposed by microcracks of the interdiffusion layer (cathode) is drastically increased when the coating layer is extinct.

Original language	English
Pages (from-to)	1599-1604
Number of pages	6
Journal	Materials Transactions
Volume	56
Issue number	9
DOIs	https://doi.org/10.2320/matertrans.M2015134
State	Published - 2015

Keywords

Galvanic current
Hot-dip aluminizing
Interdiffusion layer
Pitting corrosion
Stainless steel

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10.2320/matertrans.M2015134

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title = "Electrochemical corrosion behavior of AISI 409L stainless steel aluminized by hot-dip coating method in automotive exhaust gas solution",

abstract = "This paper focuses on the pitting resistance of hot-dip aluminized (HDA) stainless steel after the depletion of the coating layer formed in the exhaust condensed solution. HDA stainless steel is composed of a coating layer, an interdiffusion layer, and a substrate. In the interdiffusion layer which is mainly composed of Al7(Fe,Cr)2Si and (Fe,Cr)(Al,Si)3, microcracks were observed in the (Fe,Cr)(Al,Si)3 layer. From electrochemical tests, the corrosion potential of the Al-10Si coating-removed 409L is higher than that of the interdiffusion layer-removed 409L. The pit depth of the substrate (anode) exposed by microcracks of the interdiffusion layer (cathode) is drastically increased when the coating layer is extinct.",

keywords = "Galvanic current, Hot-dip aluminizing, Interdiffusion layer, Pitting corrosion, Stainless steel",

author = "Kim, \{Min Jun\} and Woo, \{Seok Ho\} and Kim, \{Jung Gu\}",

note = "Publisher Copyright: {\textcopyright} 2015 The Japan Institute of Metals and Materials.",

year = "2015",

doi = "10.2320/matertrans.M2015134",

language = "English",

volume = "56",

pages = "1599--1604",

journal = "Materials Transactions",

issn = "1345-9678",

publisher = "Japan Institute of Metals (JIM)",

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}

TY - JOUR

T1 - Electrochemical corrosion behavior of AISI 409L stainless steel aluminized by hot-dip coating method in automotive exhaust gas solution

AU - Kim, Min Jun

AU - Woo, Seok Ho

AU - Kim, Jung Gu

PY - 2015

Y1 - 2015

N2 - This paper focuses on the pitting resistance of hot-dip aluminized (HDA) stainless steel after the depletion of the coating layer formed in the exhaust condensed solution. HDA stainless steel is composed of a coating layer, an interdiffusion layer, and a substrate. In the interdiffusion layer which is mainly composed of Al7(Fe,Cr)2Si and (Fe,Cr)(Al,Si)3, microcracks were observed in the (Fe,Cr)(Al,Si)3 layer. From electrochemical tests, the corrosion potential of the Al-10Si coating-removed 409L is higher than that of the interdiffusion layer-removed 409L. The pit depth of the substrate (anode) exposed by microcracks of the interdiffusion layer (cathode) is drastically increased when the coating layer is extinct.

AB - This paper focuses on the pitting resistance of hot-dip aluminized (HDA) stainless steel after the depletion of the coating layer formed in the exhaust condensed solution. HDA stainless steel is composed of a coating layer, an interdiffusion layer, and a substrate. In the interdiffusion layer which is mainly composed of Al7(Fe,Cr)2Si and (Fe,Cr)(Al,Si)3, microcracks were observed in the (Fe,Cr)(Al,Si)3 layer. From electrochemical tests, the corrosion potential of the Al-10Si coating-removed 409L is higher than that of the interdiffusion layer-removed 409L. The pit depth of the substrate (anode) exposed by microcracks of the interdiffusion layer (cathode) is drastically increased when the coating layer is extinct.

KW - Galvanic current

KW - Hot-dip aluminizing

KW - Interdiffusion layer

KW - Pitting corrosion

KW - Stainless steel

UR - https://www.scopus.com/pages/publications/84941112270

U2 - 10.2320/matertrans.M2015134

DO - 10.2320/matertrans.M2015134

M3 - Article

AN - SCOPUS:84941112270

SN - 1345-9678

VL - 56

SP - 1599

EP - 1604

JO - Materials Transactions

JF - Materials Transactions

IS - 9

ER -

Electrochemical corrosion behavior of AISI 409L stainless steel aluminized by hot-dip coating method in automotive exhaust gas solution

Abstract

Keywords

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