Table 5 EIS parameters of for X-65 immersed in 1.0 M HCl without and with various doses of PAS inhibitor.

From: Experimental and theoretical assessments of an innovative star-shaped polyamine surfactant designed for X-65 steel corrosion mitigation in acidic environment

Inh

Conc.

(µM)

Rs,

(Ω cm2)

CPE

Cdl (F/cm2) × 10–5

τ

(s)

RP

(Ω cm2)

θ

\(\eta \%\)

n

Y°

(µS/cm2)

Blank

–

1.391

0.991

107.23

2.811

0.00445

15.86

 

–

PAS

5

1.724

0.981

62.91

2.196

0.01133

51.62

0.6927

69.27

 

10

2.341

0.994

54.86

1.383

0.01273

92.06

0.8277

82.77

 

50

2.138

0.989

48.02

1.239

0.01592

128.45

0.8765

87.65

 

100

1.097

0.976

39.45

1.034

0.01783

172.37

0.9079

90.79

 

500

1.781

0.969

23.18

0.301

0.00796

265.04

0.9397

93.97

 

1000

1.139

0.998

13.09

0.204

0.00713

348.56

0.9546

95.46

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