1. Corrosion Behavior of Electrodeposited ZnNi Alloy–CeO2 Modified SiO2 Particle Composite Coatings
- Author
-
Nguyen Van Khuong, Le Duc Bao, Nguyen Van Chien, Nguyen Thanh Huong, Le Ba Thang, and Truong Thi Nam
- Subjects
Materials science ,Composite number ,Alloy ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Corrosion ,Coating ,Plating ,engineering ,Particle ,Salt spray test ,Physical and Theoretical Chemistry ,Composite material ,0210 nano-technology ,Polarization (electrochemistry) - Abstract
In this research, CeO2 modified SiO2 powder was prepared for electrodepositing ZnNi alloy–CeO2 modified SiO2 particle composite coatings. Corrosion behavior of the ZnNi/(SiO2)CeO2 composite coatings was studied by the potentiodynamic polarization method and neutral salt spray test. The results show that the composite coating obtained at the plating current density of 3 A/dm2 in 20 min has the chemical composition with the nickel content of 14.90 wt %, which is composed only of the gamma phase. This composite coating has the brightest surface and the best corrosion resistance. The coating has the largest polarization resistance of 2430.48 Ω cm2 from polarization curve and the time for appearing the first red rust spot on the surface of this coating is the longest, lasting 1008 h.
- Published
- 2021