Table 4 Mild steel EIS parameters in 1 M HCl solution without and with the addition of different concentrations of OHB.

From: Isatin Schiff base is an effective corrosion inhibitor for mild steel in hydrochloric acid solution: gravimetrical, electrochemical, and computational investigation

Conc. (mM)

Rs (Ω cm2)

Rct (Ω cm2)

Cdl (μF)

IE%

0.0

2.4

55.85

530

0

0.1

2.3

104.84

285

65.7

0.2

2.2

213.24

305

74.6

0.3

2.4

309.55

230

81.8

0.4

2.4

395.67

175

90.5

0.5

2.3

512.88

122

96.1

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