Protection of Brass in HCl Solution by L-Cysteine and Cationic Surfactant

Table 4

Polarization resistance and inhibition efficiency for brass in acidic chloride solution after immersion in cysteine and SDS solutions for various periods of time.

Cinh (mol/dm^3)	t (min)	Rp (kΩ·cm^2)	IE (%)
1·10^−2 Cys	15	2.37	50.0
	30	2.4	55.5
	60	3.0	58.3
	1140	3.55	61.1
1·10^−3 SDS	15	4.41	83.3
	30	5.57	87.2
	60	6.44	91.1
	1200	7.7	94.4
	4080	7.80	96.4