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

Figure 6

Photographs of samples after 208 h of salt spray tests: (a) bare aluminum; (b) GPZ; (c) GPZ-plasma; (d) GPZ-Ce; (e) GPZ-Ce-plasma.

(a)

(b)

(c)

(d)

(e)