Isomers of Poly Aminophenol: Chemical Synthesis, Characterization, and Its Corrosion Protection Aspect on Mild Steel in 1 M HCl

Table 2

Potentiodynamic polarization parameters for mild steel without and with different concentrations of isomers of aminophenol in 1 M HCl.

Inhibitor concentration; (mg/L)	𝐸corr (mV)	𝐼corr  (μA/cm^2)	𝑏𝑎 (mV/decade)	𝑏𝑐  (mV/decade)	IE (%)	Corrosion rate (mm/year)
PoAP
Blank	471	3710	61	43	—	20.09
25	434	277	50	75	92.5	3.21
50	445	254	75	56	93.2	2.95
100	436	221	72	49	94	2.57
250	437	164	70	54	95.6	1.90
500	443	104	73	56	97.2	1.21
PmAP
Blank	471	3710	61	43	—	20.09
25	439	1938	77	42	47.7	12.08
50	452	1040	56	52	72	8.82
100	454	565	76	75	84.7	6.57
250	444	400	93	59	89.2	4.65
500	455	364	52	74	90.2	4.24
PpAP
Blank	471	3710	61	43	—	20.09
25	444	1041	58	41	72	8.81
50	466	283	44	75	92.4	3.98
100	469	196	81	50	94.7	2.27
250	481	131	71	58	96.5	1.52
500	458	244	40	51	93.4	2.84