Electrochemical characterization of Fe-Mn-Al-Ni shape memory alloy in an alkaline solution contaminated with Cl- ions

被引：6

作者：

Frenck, Johanna-Maria ^{[1
]}

Link, Janna ^{[1
,2
]}

Vollmer, Malte ^{[1
]}

Niendorf, Thomas ^{[1
]}

机构：

[1] Univ Kassel, Inst Mat Engn, Moenchebergstr 3, D-34125 Kassel, Germany

[2] Univ Kassel, Dept Struct Mat & Construct Chem, Moenchebergstr 7, D-34125 Kassel, Germany

来源：

MATERIALS LETTERS | 2023年 / 346卷

关键词：

Shape memory alloy; Fe-Mn-Al-Ni; Passive behavior; Pitting corrosion; NaCl; KOH;

D O I：

10.1016/j.matlet.2023.134457

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present work electrochemical corrosion properties of Fe-Mn-Al-Ni in different electrolytic solutions have been investigated by determining the open circuit potential and by conducting potentiodynamic polarization measurements. The corrosion experiments reveal that the exposure to a solution with a high pH (=13.3) results in a passive behavior. However, after adding Cl- ions to the solution, the corrosion behavior changes from passivating to non-passivating. Optical microscopy images further reveal that, independent from the electrolytic solution, selective corrosion of the beta-Mn-phase or the gamma'-phase occurs.

引用

页数：4

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