Synergistic Effect of KI on Corrosion Inhibition of Mild Steel by Polynuclear Schiff Base in Sulphuric Acid

Table 6

Polarization parameters of MS specimens in 0.5 M H₂SO₄ at 30°C in the absence and presence of A9O3AP + 0.2 mM KI.

Tafel data
𝐶; (mM)	𝐸corr; (mV/SCE)	𝐼corr; (mA/cm^2)	𝑏𝑎; (mV/dec)	−𝑏𝑐; (mV/dec)	𝜂pol%
Blank	−467	1.1700	82	124	—
0.2 + KI	−469	0.1730	57	97	85.21
0.4 + KI	−465	0.0980	63	102	91.62
0.6 + KI	−470	0.0802	88	103	93.15
0.8 + KI	−453	0.0401	30	99	96.57
1.0 + KI	−451	0.0399	40	130	96.59