Abstract This paper introduces the achievements of the aging performance on the organic protective coating degeneration aging research through permeable corrosive medium research, coated concrete chloride ion permeability research, the aging research of organic coating and electrochemistry impedance research, related test methods have been introduced too. Research indicated that after 25 weeks and 8 weeks artificial accelerating aging test respectively,the polyurea coating and polyurethane coating was characterized by slightly damaged microstructure and degraded corrosion resistance; in the beginning, the diffusion coefficient of Cl-in protective coating remained at a ratio, once the coefficient grew up to the critical point, the diffusion coefficient of Cl-would increase linearly, however, the coefficient of coated concrete was two or three order of magnitude lower than no treatment samples; the failure effect analysis of the protective coating adhesion could be measured by capacitance of the coating.
Key words organic coating, aging, degradation, chloride ion, impedance
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