Sweet Corrosion Inhibition on API 5L-B Pipeline Steel

Table 2

Polarization data obtained in the absence and presence of inhibitors at 25°C.

Comp.	Conc.,; ppm	−𝐸corr versus SCE,; mV	𝑖corr,; 𝜇A·cm^−²	−𝛽𝑐,; mV·dec^−1	𝛽𝑎,; mV·dec^−1	𝜃	IE, %	C.R,; 𝜇m·y^−1
Blank	0	623	289	367	110			3387
	0.1	631	230	276	100	0.204	20.4	2691
	0.5	621	152	277	90	0.474	47.4	1784
Itraconazole	1	671	100	230	92	0.654	65.4	1179
	5	670	90	255	91	0.689	68.9	1062
	10	696	62	274	98	0.785	78.5	732
	15	683	24	137	85	0.917	91.7	282
	0.1	615	221	330	110	0.235	23.5	2592
	0.5	667	184	342	128	0.363	36.3	2159
	1	628	144	147	80	0.502	50.2	1691
Fluconazole	5	670	81	181	96	0.720	72.0	958
	10	684	63	157	82	0.782	78.2	744
	15	674	44	136	77	0.848	84.8	519
	20	680	28	122	67	0.903	90.3	336