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

Table 6

Impedance parameters of Cu-Ni (90/10) alloy in seawater and prefilmed alloy in the presence of 3.33 mM BTAH in seawater at different temperatures. (Immersion period: 48 h).

Specimen	Environment	Temperature	𝑅ct	(CPE)dl	𝑛1	𝑅film	(CPE)film	𝑛2	IE (%)
			(kΩ cm^2)	(𝜇F cm^−2)		(kΩ cm^2)	(𝜇F cm^−2)
Bare alloy	Seawater	40	2.972	8.38	0.71	0.004	72.52	0.57	—
Prefilmed alloy	Seawater + 3.33 mM BTAH	40	1231.0	0.310	0.86	237.5	0.493	0.80	99.76
Bare alloy	Seawater	60	0.315	50.42	0.58	0.002	210.0	0.55	—
Prefilmed alloy	Seawater + 3.33 mM BTAH	60	542.0	0.520	0.82	473.0	0.748	0.78	99.94