The Corrosion Behavior of Ti-Based Metallic Glass Matrix Composites in the H2SO4 Solution

Abstract

Abstract:In-situ metallic glass matrix composites (MGMCs) are a new kind of promising structural engineering material. In this study, a comprehensive study about the corrosion behavior of in-situ Ti 46 Zr 20 V 12 Cu 5 Be 17 MGMCs versus their size was conducted. It is interesting to find that the large sample exhibits a more excellent corrosion resistance than the small sample in the 10% H 2 SO 4 solution both in chemical and electrochemical tests at room temperature. Furthermore, the results obtained from X-ray photoelectron spectra (XPS) demonstrate that the quality of the passive film formed on the large-sized sample is indeed superior to the small-sized sample. Based on (scanning electron microscope) SEM observation, the possible mechanisms of the observed phenomenon have been discussed in the present study.

Corrosion properties and mechanism of Ti43Zr27Mo5Cu10Be15 amorphous composites in various conditions

“…Even with five metallic components, corrosion in NaCl solution may be thought as a simple corrosion cell, the corrosion model is shown in figure 8(a), with anodic dissolution of metal atoms followed by cathodic oxygen reduction. Ti, Zr, Mo, and Cu have standard equilibrium electrode potential (SEP) of −1.210 V, −1.529 V, −0.220 V, and 0.337 V, respectively [22,29]. At the applied potential, Zr are more prone to lose electrons and becoming Zr 4+ .…”

“…The distribution of components in the matrix and dendrites was discovered to be connected to the distinct corrosion behavior. The corrosion behavior of Ti 46 Zr 20 V 12 Cu 5 Be 17 in 10% H 2 SO 4 solution was studied by Qiao et al [22]. Chemical and electrochemical studies at room temperature show that the bigger sample had better corrosion resistance.…”

Electrochemical Behavior in Simulated Physiological Solution of Ti-Nb-Zr-Calcium Pyrophosphate Composite with Enhanced Bioactivity by Spark Plasma Sintering

“…Electrochemical and bioactivity measurement.-The corrosion resistance of the Ti-35Nb-7Zr-CPP composites were evaluated by the potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS) through SP-300 electrochemical measurement system (Bio-logic SAS Co., France) in simulated physiological solution (Hank's solution), 27,28 A saturated calomel electrode (SCE) was adopted as the reference electrode and a platinum piece as the counter electrode. The polarization scan was carried out at a rate of 1 mVs −1 .…”