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

Table 15

Weight-loss data of Cu-Ni (90/10) alloy in seawater and 10 ppm of inorganic sulphide containing seawater in the absence and presence of different concentrations of BTAH after 30-day immersion period. (Temperature: 30°C).

Environment	Weight before immersion	Weight after immersion	Weight loss	Corrosion rate	IE (%)
	(𝑊1) (g)	(𝑊2) (g)	(Δ𝑊) (g)	(mmpy)
Seawater	8.10845	8.09889	0.00956	0.01295	—
Seawater + 10 ppm sulphide	8.26840	8.25173	0.01667	0.02258	—
Seawater + 2.5 mM BTAH	8.15888	8.15825	0.00063	0.00085	93.41
Seawater + 3.33 mM BTAH	8.56288	8.56283	0.00005	0.00007	99.48
Seawater + 10 ppm sulphide + 2.5 mM BTAH	7.71100	7.70865	0.00235	0.00318	85.90
Seawater + 10 ppm sulphide + 3.33 mM BTAH	8.28198	8.28191	0.00007	0.00009	99.58