Table 8 The impedance parameters for copper in 0.6 M NaCl in the absence and presence of different concentrations of ME, QF and nBF at ambient temperature.

From: Anticorrosion and antimicrobial performance of extracted and fractionated phytochemicals of terminalia bentzoe leaves

Type of inhibitor

Conc.

(ppm)

Rs

(Ω)

R1

(Ω cm2)

Q

R2

(KΩ cm2)

C

(µF cm− 2)

W

mΩ−1

Y

(µΩ−1cm−2)

n

Blank

0

8.37

0.067

762

0.54

0.399

11

10.4

    

Q1

 

Q2

Y(mΩ−1cm−2)

n

Y (mΩ−1cm−2)

n

nBF

20

7.41

8.95

1.83

0.50

1.05

0.029

0.83

40

7.72

5.12

1.78

0.50

1.11

0.018

0.85

60

7.00

4.31

1.72

0.52

1.12

0.012

0.90

80

6.12

8.95

1.69

0.50

1.03

0.019

0.80

100

9.84

9.72

1.79

0.50

1.01

0.021

0.78

ME

20

9.72

559

0.38

0.64

0.89

1360

0.70

40

13.3

296

0.39

0.70

0.99

1010

0.65

60

8.73

226

0.62

0.63

1.04

619

0.69

80

9.21

223

0.54

0.64

0.76

799

0.59

100

8.11

118

4.40

0.55

0.68

2510

0.59

QF

20

7.81

26.70

0.093

0.83

0.99

0.92

0.50

40

6.91

26.80

0.14

0.78

0.79

0.91

0.50

60

9.10

29.10

0.19

0.70

0.76

0.58

0.50

80

7.80

147.10

0.27

0.70

0.75

0.75

0.60

100

8.00

227.00

0.16

0.80

0.73

1.01

0.58

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