Open AccessStudy on diffusion of NaOH solution in zinc-rich epoxy coating using EIS
Author(s) -
Chao Yang,
Zili Li
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/729/1/012051
Subject(s) - epoxy , diffusion , coating , capacitance , materials science , zinc , diffusion layer , electrical impedance , equivalent circuit , dielectric spectroscopy , layer (electronics) , electrode , electrochemistry , diffusion process , double layer capacitance , composite material , chemistry , metallurgy , electrical engineering , thermodynamics , innovation diffusion , engineering , physics , voltage , computer science , knowledge management
In order to explore the diffusion process of NaOH solution in zinc-rich epoxy coating, in this paper, conventional three-electrode system was used to test the open circuit potential and electrochemical impedance spectrum, and equivalent electric circuit was fitted to get the related parameters including capacitance, resistance, phase angle and et al to reveal the diffusion process. The results show that three stages are divided including diffusion in coating, finite layer diffusion and double layer diffusion, and two criterions are put forward.