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

Table 5

Potentiodynamic polarization parameters for the corrosion of MS in 0.5 M HCl in the absence and presence of different concentrations of 2-MTPH, 3-MTPH, and 4-MTPH at 303 K.

Inhibitor	Concentration	(mV)	(mA cm^−2)	(mV dec^−1)	(mV dec^−1)	Linear polarisation	% IE
	Blank	−502	0.2	4.53	2.65	302	—
2-MTPH	0.22	−480	0.0630	15.24	6.03	324	68.5
	0.44	−463	0.0544	13.25	5.64	422	72.8
	0.66	−486	0.0198	14.86	7.76	970	90.1
	0.88	−489	0.0099	11.86	9.50	2057	95.1
3-MTPH	0.22	−476	0.107	12.30	5.86	224	46.5
	0.44	−489	0.0797	9.54	6.15	374	60.2
	0.66	−488	0.0428	8.94	7.15	610	77.9
	0.88	−473	0.0271	13.96	6.51	782	86.4
4-MTPH	0.22	−466	0.1007	15.05	5.58	295	49.7
	0.44	−493	0.0718	10.15	8.21	422	64.1
	0.66	−476	0.0423	9.69	8.42	674	78.9
	0.88	−491	0.0243	10.60	9.34	896	87.8