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Table 5 EIS parameters obtained by fitting the data to an equivalent circuit for the samples immersed for 7 days in NaCl brine

From: Mechanism of corrosion protection in chloride solution by an apple-based green inhibitor: experimental and theoretical studies

Sample NameRf
(Ω cm2) × 102
QfCf
(F cm−2) × 10−4
Rct
(KΩ cm2)
QdlCdl
(F cm− 2) × 10− 4
W
(Ω cm2 s-1/2)
Rpa
(KΩ cm2)
IE%b
Y0f
−1 cm− 2 snf) × 10− 4
nfY0dl
− 1 cm− 2 sndl) × 10− 4
ndl
WAPE01.48 ± 1.1718.69 ± 8.000.64 ± 0.104.76 ± 3.271.09 ± 0.047.61 ± 3.510.83 ± 0.117.48 ± 3.731.24
WAPE11.42 ± 0.682.99 ± 1.250.62 ± 0.230.63 ± 0.327.67 ± 1.0812.08 ± 3.840.66 ± 0.1095.59 ± 77.557.8284.2
WAPE25.78 ± 2.722.10 ± 0.760.83 ± 0.011.02 ± 1.3310.56 ± 7.465.99 ± 1.430.61 ± 0.0423.63 ± 19.8775.75 ± 75.7411.1388.9
WAPE33.39 ± 3.353.26 ± 1.710.47 ± 0.190.44 ± 0.4499.28 ± 98.313.28 ± 1.890.82 ± 0.033.04 ± 1.271.02 ± 1.0199.6198.8
  1. Note: standard errors are reported
  2. aRp = Rf + Rct
  3. bIE% = (1 - Rp (uninhibited) / Rp (inhibited)) × 100