Development of a New Multifunctional Cationic Surfactant System with Corrosion Inhibiting Ability

Table 2

Weight loss results for N80 steel in 20 wt.% HCl in the absence and presence of inhibitor for 4 h.

Entry	Surfactants	(°C)	(wt.%)	(g m^−2 h^−1)		IE%
(1)	20% HCl	90	0	593.8
(2)	20% HCl	60	0	281.3
(3)	2a	90	1.0	46.2	0.922	92.2
(4)	2b	90	1.0	10.4	0.982	98.2
(5)	2b	60	1.0	3.75	0.982	98.2
(6)	2c	90	1.0	17.2	0.971	97.1
(7)	2c	90	0.39	12.8	0.979	97.9
(8)	2c	90	0.10	32.4	0.945	94.5
(9)	2c	90	0.039	59.8	0.899	89.9
(10)	2c	90	0.010	517.4	0.129	12.9
(11)	2d	90	1.0	20.7	0.965	96.5
(12)	2e	90	1.0	163.4	0.725	72.5