Abstract
The objectives of this study are to clarify the dissolution behavior of the ferritic phase (α phase) and the austenitic phase (γ phase) of a duplex stainless steel (DSS), and to propose a corrosion mechanism of the DSS through dissolution behavior of either the α phase or the γ phase at corrosion potential, respectively. Just a single phase specimen (α or γ phase specimen) was prepared by using selective dissolution of the DSS. The α phase showed less-noble corrosion potential compared to the γ phase, and passivated at less-noble potential. When the polarization curves of each phase are summed up, the obtained curve showed good agreement with the DSS polarization curve. The α phase of the DSS dissolved preferentially at corrosion potential. Based on these results, a preferential dissolution mechanism model of a DSS is proposed using internal polarization curves of each phase.
| Original language | English |
|---|---|
| Pages (from-to) | 328-332 |
| Number of pages | 5 |
| Journal | Zairyo to Kankyo/ Corrosion Engineering |
| Volume | 60 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2011 |
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Keywords
- Austenitic phase
- Corrosion potential
- Duplex stainless steel
- Ferritic phase
- Polarization curve
- Preferential dissolution
ASJC Scopus subject areas
- Electrochemistry
- Materials Chemistry
- Metals and Alloys
- Surfaces, Coatings and Films
Cite this
Dissolution behavior of α and γ phases and preferential dissolution mechanism of a duplex stainless steel in a simulated crevice solution. / Aoki, So; Yakuwa, Hiroshi; Miyasaka, Matsuho; Sakai, Jun'ichi.
In: Zairyo to Kankyo/ Corrosion Engineering, Vol. 60, No. 7, 2011, p. 328-332.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Dissolution behavior of α and γ phases and preferential dissolution mechanism of a duplex stainless steel in a simulated crevice solution
AU - Aoki, So
AU - Yakuwa, Hiroshi
AU - Miyasaka, Matsuho
AU - Sakai, Jun'ichi
PY - 2011
Y1 - 2011
N2 - The objectives of this study are to clarify the dissolution behavior of the ferritic phase (α phase) and the austenitic phase (γ phase) of a duplex stainless steel (DSS), and to propose a corrosion mechanism of the DSS through dissolution behavior of either the α phase or the γ phase at corrosion potential, respectively. Just a single phase specimen (α or γ phase specimen) was prepared by using selective dissolution of the DSS. The α phase showed less-noble corrosion potential compared to the γ phase, and passivated at less-noble potential. When the polarization curves of each phase are summed up, the obtained curve showed good agreement with the DSS polarization curve. The α phase of the DSS dissolved preferentially at corrosion potential. Based on these results, a preferential dissolution mechanism model of a DSS is proposed using internal polarization curves of each phase.
AB - The objectives of this study are to clarify the dissolution behavior of the ferritic phase (α phase) and the austenitic phase (γ phase) of a duplex stainless steel (DSS), and to propose a corrosion mechanism of the DSS through dissolution behavior of either the α phase or the γ phase at corrosion potential, respectively. Just a single phase specimen (α or γ phase specimen) was prepared by using selective dissolution of the DSS. The α phase showed less-noble corrosion potential compared to the γ phase, and passivated at less-noble potential. When the polarization curves of each phase are summed up, the obtained curve showed good agreement with the DSS polarization curve. The α phase of the DSS dissolved preferentially at corrosion potential. Based on these results, a preferential dissolution mechanism model of a DSS is proposed using internal polarization curves of each phase.
KW - Austenitic phase
KW - Corrosion potential
KW - Duplex stainless steel
KW - Ferritic phase
KW - Polarization curve
KW - Preferential dissolution
UR - http://www.scopus.com/inward/record.url?scp=84855576963&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855576963&partnerID=8YFLogxK
U2 - 10.3323/jcorr.60.328
DO - 10.3323/jcorr.60.328
M3 - Article
AN - SCOPUS:84855576963
VL - 60
SP - 328
EP - 332
JO - Corrosion Engineering
JF - Corrosion Engineering
SN - 0917-0480
IS - 7
ER -