Table 1 EIS characteristics of C&S corrosion in 1 M HCl in the absence and the presence of Tetra-Pz-Ortho and Tetra-Pz-Para.

From: Experimental and computational approach on the corrosion inhibition properties of two newly pyrazole derivatives on carbon steel in acid medium

 

Conc.

(M)

Rs

(Ω cm2)

Rp

(Ω cm2)

106×A

(Ω−1sncm−2)

n

Cdl

(µF cm−2)

χ2

τ

(ms)

ηz(%)

HCl

Blank

0.8

21.57

293.9

0.85

116.2

0.002

2.51

***

Tetra-Pz-Ortho

10−3

4.2

705.7

32.7

0.87

18.6

0.005

13.13

96.9

10−4

2.6

430.9

44.5

0.86

23.4

0.009

10.08

95.0

10−5

3.1

217.2

84.8

0.84

39.3

0.004

8.54

90.1

10−6

2.1

106.9

132.1

0.83

55.2

0.002

5.90

79.8

Tetra-Pz-Para

10−3

2.8

562.8

33.5

0.88

19.5

0.004

10.97

96.2

10−4

1.8

298.8

67.2

0.84

31.9

0.008

9.53

92.8

10−5

1.2

174.5

121.7

0.84

58.4

0.007

10.19

87.6

10−6

1.9

95.2

143.5

0.83

59.6

0.009

5.67

77.3

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