Corrosion Inhibition of Cu-Ni (90/10) Alloy in Seawater and Sulphide-Polluted Seawater Environments by 1,2,3-Benzotriazole

Table 8

Impedance parameters of Cu-Ni (90/10) alloy in seawater containing 10 ppm of inorganic sulphide in the presence of 3.33 mM BTAH at different immersion periods. (Temperature: 30°C).

Immersion period (h)	𝑅ct	(CPE)dl	𝑛1	𝑅film	(CPE)film	𝑛2	IE (%)
	(kΩ cm^2)	(𝜇F cm^−2)		(kΩ cm^2)	(𝜇F cm^−2)
1	42.13	0.577	0.61	8.399	1.621	0.64	98.81
3	390.1	0.086	0.81	47.98	0.602	0.74	99.87
6	712.0	0.043	0.82	114.6	0.476	0.77	99.91
24	1361.0	0.028	0.88	686.2	0.438	0.77	99.94
48	2516.0	0.026	0.90	937.5	0.239	0.82	99.97