Table 1 Polarization parameters of mild steel immersed in 1 M HCl in absence and presence of different inhibitors concentrations.

From: Prolonged corrosion protection via application of 4-ferrocenylbutyl saturated carboxylate ester derivatives with superior inhibition performance for mild steel

Immersion time (h)

Cinh (mM)

Ecorr (mV vs. Ag/AgCl)

Icorr (µA/cm2)

Ba (mV/dec)

Bc (mV/dec)

Rp (Ω cm2)

η (%)

Blank

 2

–

 − 421.10

152.45

46.67

122.26

96.22

–

6a

 2

1

 − 394.06

18.45

39.44

101.41

668.28

85.60

 2

2

 − 368.82

15.12

39.92

174.11

932.71

89.68

 2

4

 − 355.56

27.26

48.60

163.11

596.48

83.87

 2

8

 − 363.16

41.09

52.85

181.33

432.54

77.75

6c

 2

1

 − 398.76

20.51

64.87

142.49

944.04

89.81

 2

2

 − 428.62

6.71

46.05

118.14

2144.70

95.51

 2

4

 − 429.55

10.28

64.17

126.43

1498.10

93.58

 2

8

 − 405.99

17.23

53.06

155.98

998.32

90.36

6b

 2

1

 − 406.70

20.61

86.39

164.99

1195.00

91.95

 2

2

 − 383.79

8.11

98.21

109.80

2771.70

96.53

 2

4

 − 447.76

9.53

123.18

115.88

2720.10

96.46

 2

8

 − 359.86

12.16

82.48

152.55

1911.60

94.97

 170

2

 − 387.19

9.31

108.28

133.09

2786.10

96.54

 340

2

 − 415.46

15.69

74.09

131.72

1312.90

92.67

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