Corrosion Inhibition of Carbon Steel in 0.5 M H₂SO₄ by Phtalocyanine Blue

Table 2

Potentiodynamical polarization parameters for the corrosion of 1018 carbon steel in 0.5 M H₂SO₄ at 25°C.

𝐶inh; (ppm)	𝐸corr; (mV)	𝑖corr; (mA/cm^2)	𝐸pas; (mV)	𝑖pas; (mA/cm^2)	I.E.; (%)
0	−503	0.3	725	6.2	—
100	−456	0.2	535	3.7	40
200	−457	0.15	645	5.3	15
400	−460	0.13	530	2.8	55
600	−462	0.12	535	1.7	67
800	−459	0.11	286	1.1	82
1000	−461	0.1	207	4.9	26