Table 7 EIS parameters for CS in 0.5 M H2SO4 without and with 9 × 10− 5 M of KB1 and KB2 at various immersion times.

From: A comprehensive experimental and theoretical perspective of novel triazole-based pyridine and quinoline derivatives for corrosion protection of carbon steel in sulfuric acid solution

Compound

Time, h

Rs, Ω cm²

Rct, Ω cm²± SD

Goodness of fit(x10− 3)

θ

%IE

Blank

0.5

2.124

69.44 ± 1.69

5.528

–

–

1

2.105

102.3 ± 1.44

5.424

–

–

2

2.090

149.8 ± 2.08

5.673

–

–

3

2.215

131.5 ± 2.16

4.560

–

–

4

2.109

229.0 ± 1.76

5.487

–

–

5

2.120

262.0 ± 1.69

5.381

–

–

6

2.125

286.0 ± 1.80

5.183

–

–

52

2.137

699.4 ± 1.31

4.691

–

–

93

1.985

848.0 ± 1.67

6.993

–

–

KB1

0.5

2.750

382.3 ± 2.49

3.217

0.818

81.8

1

2.741

652.7 ± 2.16

3.597

0.843

84.3

2

2.717

787.8 ± 1.67

3.310

0.810

81.0

3

2.684

1075.0 ± 1.59

3.634

0.878

87.8

4

2.653

1393.0 ± 1.63

3.511

0.836

83.6

5

2.630

1832.0 ± 2.74

3.813

0.857

85.7

6

2.620

2150.0 ± 1.51

3.821

0.867

86.7

52

2.641

1788.0 ± 1.68

3.043

0.609

60.9

93

2.517

2453.0 ± 2.49

4.539

0.654

65.4

KB2

0.5

2.970

977.9 ± 1.59

3.997

0.929

92.9

1

2.923

1245.0 ± 1.51

4.592

0.918

91.8

2

2.897

1540.0 ± 2.94

5.014

0.903

90.3

3

2.936

1890.0 ± 1.63

4.984

0.930

93.0

4

2.936

2200.0 ± 1.45

5.152

0.896

89.6

5

2.960

2420.0 ± 2.45

5.170

0.892

89.2

6

2.945

2770.0 ± 2.49

5.269

0.897

89.7

52

2.558

2700.0 ± 1.59

4.284

0.741

74.1

93

2.568

2685.0 ± 1.40

4.463

0.684

68.4

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