Deposition of Coating to Protect Waste Water Reservoir in Acidic Solution by Arc Thermal Spray Process

Table 1

Electrochemical parameters of the SS plate, SS-sprayed coating, and Ti-sprayed coating extracted after fitting of EIS data to suitable EECs with different exposure periods in pH 4 solution.

Time (h)	1			312
Sample ID	SS plate	SS sprayed	Ti sprayed	SS plate	SS sprayed	Ti sprayed
Rs (kΩ·cm^2)	6.77	5.20	8.64	5.02	5.37	8.45
Rp (kΩ·cm^2)	166.00	16.02	48.19	22.82	20.15	21.07
CPE1
Q1 (1 × 10^−6) (Ω^−1·cm^−2·s^n)	2.7	62.0	7.3	29.6	41.6	37.2
	0.99	0.99	0.99	0.95	0.92	0.93
Ceff1 (µF·cm^−2)	2.68	62.0	7.22	29.0	41.0	36.5
Rct (kΩ·cm^2)	11.87	9.15	10.97	350.02	11.56	46.33
CPE2
Q2 (1 × 10^−6) (Ω^−1·cm^−2·s^n)	91.6	252.3	105.8	20.9	156.1	38.5
	0.75	0.44	0.54	0.91	0.46	0.60
Ceff2 (µF·cm^−2)	94.19	731.72	120.11	25.44	312.13	56.62
W (1 × 10^−6) (Ω·cm^2·s^−0.5)	—	—	—	4.2	—	—