Open AccessComparative studies on the corrosion behavior of some Zr-based amorphous alloys having different compositions in nitric acid medium
Author(s) -
Poonam Sharma,
Anil Dhawan,
Santosh Kumar Sharma
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1455/1/012030
Subject(s) - materials science , amorphous solid , corrosion , x ray photoelectron spectroscopy , scanning electron microscope , amorphous metal , alloy , metallurgy , zirconium alloy , nitric acid , analytical chemistry (journal) , nuclear chemistry , chemical engineering , crystallography , composite material , chemistry , chromatography , engineering
The corrosion studies were performed on different composition of Zr-based bulk amorphous ribbon alloys such as Zr 55 Cu 30 Ni 5 Al 10 , Zr 60 Nb 2 Cu 20 Ni 8 Al 10 , Zr 59 Nb 3 Cu 20 Ni 8 Al 10 , Zr 57 Nb 5 Cu 20 Ni 8 Al 10 and Zr 60 Pd 5 Cu1 5 Ni 10 Al 10 alloys at room temperature. The amorphous nature of all the above mentioned alloys was confirmed by X-ray diffraction (XRD). The corrosion behavior was investigated using potentiodynamic polarization and weight loss analysis methods at room temperature. Surface morphology of these corroded samples were investigated by optical microscopy and scanning electron microscopy (SEM). The results of the investigations revealed the fact that Nb containing Zr-based bulk amorphous alloys shows better corrosion resistance among all the investigated alloys due to the presence of Nb 2 O 5 . The presence of Nb 2 O 5 on the surface of Nb containing Zr-based bulk amorphous alloy after immersion in HNO 3 medium was confirmed by X-ray photoelectron spectroscopy (XPS) techniques.