Work

The Influence of Surface Nanocrystallization of TA2 Titanium Alloy on Its Corrosion Resistance

Year: 2024

Type: article

Abstract: In this study, the surface nano treatment of TA2 titanium alloy was realized by means of surface mechanical wear treatment. The microstructure and electrochemical properties of the nanocrystalline layer were investigated by SEM, TEM, Electrochemical Impedance Spectroscopy, and Potentiodynamic Polarization, while the nucleation mechanism of the passivation film was discussed. The results indicate that the original coarse grains on the sample’s surface are transformed into randomly oriented nanocrystals by surface mechanical attrition treatment (SMAT). The corrosion current density of the surface nanocrystallized TA2 titanium alloy (9.2 nA·cm−2) experienced a reduction of two orders of magnitude compared to untreated TA2 titanium alloy (134.5 nA·cm−2) in 3.5 wt.% NaCl solution. The SMAT methods accelerates nucleation mechanism transitioning to continuous nucleation.

Source: Coatings

DOI: 10.3390/coatings14091114

Authors: Zhengyi Li, Yanzhao Wang, Jiangong Zhang, Yiwei Guo, Lei Wen

Institutions: University of Science and Technology Beijing, China Electric Power Research Institute, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)

Language: English

Topic: Surface Treatment and Residual Stress

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,955

Funder: National Natural Science Foundation of China