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Table 3 Corrosion parameters obtained from potentiodynamic polarization measurements obtained for the two coating conditions with and without sealant

From: Evaluation of adhesion of epoxy resin sealant to improve the corrosion resistance of thermal sprayed coatings

 

Ecorr (mV vs SCE)

Jcorr (µA·cm2)

βc (mV·dec−1)

βa (mV·dec−1)

Si (%)

Condition 1 (CoCr)

 Not sealed

− 590.5 ± 8.9

14.0 ± 1.0

79.0 ± 4.6

155.8 ± 4.0

 Sealed

− 444.4 ± 16.6

3.0 ± 0.2

141.1 ± 5.2

154.0 ± 26.7

78.6 ± 4.7

Condition 2 (FeCr)

 Not sealed

− 651.9 ± 6.9

13.9 ± 0.1

59.9 ± 2.8

127.4 ± 9.5

 Sealed

− 560.7 ± 0.1

4.1 ± 0.5

227.5 ± 5.5

238.6 ± 17.0

70.50 ± 2.4