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

Table 2

Fitting parameters of the EIS data obtained for the coated substrates after 24 h exposure to 3.5% NaCl.

Sample after; 24 h exposure	𝑅𝑠 (Ω·cm^2)	𝑌coat (Ss^𝑛cm^−2)	𝑛coat	𝑅pore (Ω·cm^2)	𝑌dl (Ss^𝑛cm^−2)	𝑛dl	𝑅ct (Ω·cm^2)	χ ^2
Al-GPZ	37.32	3.53𝐸−6	0.98	3884	6.42𝐸−7	0.98	5.23𝐸4	0.0045
Al-GPZ-Ce	31.79	5.15𝐸−6	0.96	812.5	3.58𝐸−7	0.94	1.07𝐸5	0.00003
Al-GPZ-plasma	37.82	4.28𝐸−6	0.95	4.72𝐸4	2.17𝐸−7	0.97	4.92𝐸5	0.00066
Al-GPZ-Ce-plasma	32.53	3.36𝐸−6	0.97	5163	5.32𝐸−7	0.98	1.00𝐸5	0.0055