Original scientific paper

Grain size influences the corrosion and cavitation of Ni₃Al intermetallic alloys

D. Zasada ; Faculty of Advanced Technology and Chemistry, Military University of Technology, Warsaw, Poland
R. Jasionowski ; Institute of Basic Technical Sciences, Maritime University of Szczecin, Szczecin, Poland
J. Sienkiewicz ; Faculty of Advanced Technology and Chemistry, Military University of Technology, Warsaw, Poland

Abstract

Influence of grain size on corrosion and cavitation of the Ni₃Al - based intermetallic alloy was studied in recent paper. The research was conducted on Ni₃Al - based intermetallic alloy doped with boron and zirconium. The initial grain size of 6, 20 and 45 μm the investigated samples was obtained through cold rolling followed by recrystallization annealing. It was found that initial grain size does not influence the breakthrough potential neither repassivation potential. On the other hand, various types of pits were found for alloys with different grain size during corrosion tests in sodium chloride solutions. It was found that increase of grain size results with reducing the depth of cavitational pits. However, surface area of the pits increases with increasing grain size.

Keywords

Ni₃Al alloy; corrosion; grain size/metallography; cavitation wear

Hrčak ID:

126671

URI

https://hrcak.srce.hr/126671

Publication date:

1.1.2015.

Visits: 1.383 *