Coatings and Surface Engineering for Environmental Protection III: Poster Session
Sponsored by: TMS Structural Materials Division, TMS Materials Processing and Manufacturing Division, TMS: Surface Engineering Committee, TMS: Corrosion and Environmental Effects Committee
Program Organizers: Arif Mubarok, PPG; Tushar Borkar, Cleveland State University; Rajeev Gupta, North Carolina State University; Mary Lyn Lim, PPG Industries; Raul Rebak, GE Global Research; Brian Okerberg, PPG Industries
Monday 5:30 PM
March 15, 2021
Room: RM 18
Location: TMS2021 Virtual
Effects of Processing Conditions on the Tribocorrosion Resistance of Zr-based Thin Film Metallic Glass Coatings: Wenbo Wang1; Wenjun Cai1; 1Virginia Polytechnic Institute and State University
Metallic glasses (MGs) have attracted increasing interest in various industries due to their good elastic limit, high strength, and excellent wear and corrosion resistance. For example, Zr-based thin film MGs have been applied in dental implant due to their high strength, exceptional fracture toughness and corrosion resistance. In this work, deposition parameter during magnetron sputtering were tailored to produce Zr-MG coatings with different nanoscale chemistry and microstructure. Corrosion and tribocorrosion tests were performed on all samples in simulated seawater at room temperature. Surface morphology and composition of the samples were characterized using scanning electron microscopy and energy dispersive x-ray spectroscopy prior to and post tribocorrosion testing. Finally, the effects of nanoscale chemistry and microstructure on the corrosion and degradation kinetics of Zr-MG coatings were discussed based on these results.
Role of Surface Mechanical Attritions Processing Conditions on the Corrosion Behavior of Aluminum 7075 Alloys: Vikrant Beura1; Kiran Solanki1; 1Arizona State University
In this work, the microstructural evolution and corrosion behavior of surface mechanical attrition treatment (SMAT) AA7075-T651 alloy have been investigated. Toward this, the potentiodynamic polarization, cyclic polarization, and electrochemical impedance spectroscopy characterizations were performed on samples that were SMAT at different temperatures and milling conditions. The results indicate, a reduction in corrosion rate and increment in surface impedance in SMAT processed samples as compared to as-received condition. To verify the electrochemical properties, the post-corrosion microstructural characterizations such as oxide thickness measurement through the x-ray photo-electron spectroscopy. Overall, an improved corrosion resistance in an aluminum 7075 alloy was obtained with a generation of surface nano-crystalline layer via SMAT process.