Electrochemical and corrosion study of as-cast NixAly intermetallic alloys: Influence of alloy composition and electrolyte pH

被引：5

作者：

Sefer, Birhan ^{[1
]}

Virtanen, Sannakaisa ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Surface Sci & Corros, Dept Mat Sci & Engn, Martensstr 7, DE-91058 Erlangen, Germany

来源：

CORROSION SCIENCE | 2019年 / 154卷

关键词：

Intermetallics; Nickel; Cyclic voltammetry; Polarization; Anodic dissolution; Pitting corrosion; NI-AL ALLOY; CATALYTIC-PROPERTIES; HYDROGEN-PRODUCTION; PHASE-COMPOSITION; NICKEL; BEHAVIOR; PERFORMANCE; METHANOL; POLARIZATION; PASSIVATION;

D O I：

10.1016/j.corsci.2019.03.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electrochemical and corrosion behaviour of as-cast NixAly intermetallic alloys (Ni25Al75, Ni40Al60, Ni50Al50 and Ni75Al25 in at. %) is investigated and compared with commercially pure extruded/tempered Al and wrought Ni in pH 2, 6 and 12 buffered solutions. Different microstructures among the NixAly alloys are obtained, from single- to multi-phase systems. The electrochemical and corrosion behaviour of the NixAly intermetallic alloys is complex and depends on the Ni/Al-ratio, the microstructure, the pH value of the solution, and the passivation tendency. Three corrosion types are found to be operating, uniform corrosion, localised/pitting corrosion and intergranular corrosion, with pitting corrosion being the dominating type.

引用

页码：287 / 304

页数：18

共 46 条

[1] THE PREPARATION OF RANEY NICKEL CATALYSTS AND THEIR USE UNDER CONDITIONS COMPARABLE WITH THOSE FOR PLATINUM AND PALLADIUM CATALYSTS [J].