Study of New Thiazole Based Pyridine Derivatives as Potential Corrosion Inhibitors for Mild Steel: Theoretical and Experimental Approach

Table 2

Corrosion rate and inhibition efficiency for weight loss measurement in the absence and presence of inhibitors in 0.5 M HCl at different concentrations and temperatures.

Inhibitor	(mM)	30°C	% IE	40°C	% IE	50°C	% IE	60°C	% IE
		(mg cm^2 h^−1)		(mg cm^−2 h^−1)		(mg cm^2 h^−1)		(mg cm^−2 h^−1)
Blank	—	0.516	—	0.883	—	1.224	—	1.65	—
2-MTPH	0.22	0.171	66.8 ± 0.78	0.316	64.2 ± 1.12	0.467	61.8 ± 0.55	0.6554	60.2 ± 0.38
	0.44	0.122	76.3 ± 0.44	0.2296	73.9 ± 0.96	0.364	70.2 ± 0.38	0.528	68 ± 0.4
	0.66	0.0598	88.41 ± 1.2	0.1348	84.7 ± 0.87	0.2678	78.1 ± 0.46	0.4224	74.4 ± 0.84
	0.88	0.0198	96.16 ± 1.14	0.087	90.1 ± 0.62	0.2112	82.7 ± 1.32	0.346	79 ± 0.52
3-MTPH	0.22	0.2542	50.73 ± 0.96	0.4654	47.29 ± 0.45	0.6762	44.7 ± 1.05	0.9898	40 ± 0.63
	0.44	0.1736	66.35 ± 0.88	0.3476	60.63 ± 0.84	0.53	56.6 ± 0.81	0.7984	51.6 ± 1.06
	0.66	0.1124	78.21 ± 0.39	0.2206	75.01 ± 0.76	0.4112	66.4 ± 0.92	0.6598	60 ± 0.74
	0.88	0.0738	85.6 ± 0.47	0.183	79.27 ± 0.56	0.3092	74.7 ± 0.38	0.5588	66.1 ± 0.46
4-MTPH	0.22	0.2492	51.70 ± 1.08	0.44	50.16 ± 0.83	0.6728	45 ± 0.50	0.95	42.4 ± 0.54
	0.44	0.1698	67.09 ± 0.26	0.3142	64.41 ± 0.88	0.4728	61.3 ± 0.44	0.7258	56.0 ± 0.58
	0.66	0.107	79.26 ± 0.38	0.2382	73.02 ± 0.74	0.4024	67.1 ± 0.68	0.6242	62.1 ± 0.68
	0.88	0.069	86.6 ± 0.44	0.165	81.31 ± 0.32	0.3164	74.1 ± 0.54	0.5056	69.3 ± 0.78