Table 7 EIS test results of CS dissolution in 0.5 M H2SO4 at altered doses of VO leaf extract.

From: Verbena officinalis (VO) leaf extract as an anti-corrosion inhibitor for carbon steel in acidic environment

Conc.,

ppm

Y0

(µ Ω−1 sn cm−2) x 10–6

n

Rct

Ω cm−2

Cdl

μF cm−2

(χ2)

θ

% IE

Blank

503

0.843

9

184

20.67 × 10–3

–

–

300

140

0.867

69

68

18.81 × 10–3

0.870

87.0

450

135

0.861

76

55

21.78 × 10–3

0.882

88.2

600

118

0.860

81

54

16.89 × 10–3

0.889

88.9

750

112

0.856

85

51

19.47 × 10–3

0.894

89.4

850

107

0.858

89

49

23.87 × 10–3

0.899

89.9

1000

101

0.855

100

46

19.35 × 10–3

0.910

91.1

Back to article page