Table 1.

Corrosion parameters found by Electrochemical Tafel polarization and Impedance spectroscopic measurements for carbon steel in the absence and presence of various concentrations TBMPCPC at (A) 303 K (B) 313 K (C) 323 K (D) 333 K.

Temperature (K)	Concentration of TBMPCPC (ppm)	Corrosion Potential Ecorr (V)	Corrosion Current Density icorr (A cm−2)	Corrosion Rate ν (mpy)	βc (mV/ decade)	βa (mV/ decade)	Inhibition Efficiency ηp (%)	Polarisation ResistanceRp (Ω cm2)	Cdl(μF)	Inhibition Efficiency (%) ηz
303	1M HCl	-0.132	0.066	302.60	0.109	0.976	-	14.26	381	-
	5	-0.137	0.042	260.10	0.102	0.964	36.66	14.39	380	0.92
	10	-0.152	0.022	257.10	0.094	0.927	66.66	92.87	247	84.64
	15	-0.146	0.018	255.90	0.122	0.100	72.72	112.56	106	87.33
	20	-0.154	0.013	183.20	0.103	0.922	80.30	123.05	103	88.82
	25	-0.183	0.008	160.40	0.098	0.885	87.87	168.20	85	91.52
313	1M HCl	-0.621	0.029	327.4	0.116	1.361	-	17.46	274	-
	5	-0.646	0.023	276.00	0.096	0.939	20.68	27.72	247	37.01
	10	-0.681	0.017	270.50	0.096	0.855	41.37	64.32	191	72.85
	15	-0.711	0.015	265.20	0.099	0.839	48.27	92.87	121	81.19
	20	-0.193	0.014	202.20	0.097	0.824	51.72	125.55	84	86.47
	25	-0.568	0.006	174.20	0.107	0.621	79.31	159.77	83	89.07
323	1M HCl	-0.128	0.030	350.70	0.111	1.000	-	9.92	392	-
	5	-0.141	0.027	305.10	0.950	0.101	7.94	16.04	301	38.15
	10	-0.0485	0.025	292.10	0.884	0.985	16.88	17.52	290	43.37
	15	-0.050	0.023	276.20	0.957	1.052	22.84	42.71	149	76.77
	20	-0.174	0.019	223.80	0.101	0.881	36.09	46.26	133	78.55
	25	-0.174	0.016	192.50	0.099	0.881	46.68	70.52	115	85.93
333	1M HCl	-0.121	0.031	369.40	0.118	0.016	-	9.33	218	-
	5	-0.130	0.028	332.80	0.108	0.959	10.06	15.88	150	41.24
	10	-0.127	0.026	304.90	0.110	0.988	17.61	18.39	131	49.26
	15	-0.128	0.025	298.60	0.110	0.990	19.18	20.67	123	54.86
	20	-0.158	0.020	236.00	0.107	0.907	36.16	27.56	98	66.14
	25	-0.159	0.018	218.70	0.108	0.892	40.88	27.56	72	66.14