Computational, Kinetics, and Corrosion Protection Aspects of Electrodeposited Poly(Salicylic Acid) Coatings as a Corrosion Inhibitor for Mild Steel

Table 5

Potentiodynamic polarization parameter of steel after 1 hr. of electrode immersion in a stagnant naturally aerated solution of 1 M H₂SO₄ at 25°C. containing different concentrations of PSA.

Concentration	Ecorr/mV	Rp (kΩ.cm^2)	icorr (μAcm^−2)	βa (mV/dec)	βc (mV/dec)	Corrosion rate/µmy^−1	η (%)
Blank	−670.6	0.502	107.1	263.4	−345.1	1.330	0.00
20 ppm	−671.0	0.861	71.6	257.8	−364.1	0.890	33.2
50 ppm	−672.3	0.850	45.1	188.1	−244.6	0.562	57.9
100 ppm	−672.6	1.070	27.6	157.7	−180.9	0.343	74.2