Effect of Plasma Surface Pretreatment on Ce³⁺-Doped GPTMS-ZrO₂ Self-Healing Coatings on Aluminum Alloy

Figure 5

(a) Nyquist plots of coated Al under different conditions after 24 h exposure to 3.5% NaCl solution; (b) equivalent circuit used for fitting the EIS data.

(a)

(b)