Table 3 Fitting results of the water diffusion behavior and the relative error

From: Lifetime prediction of epoxy coating using convolutional neural networks and post processing image recognition methods

Immersion time/h

Test value/%

Fitting value/%

Relative error/%

0

0

0

0

4

0.251

0.256

−1.80

20

0.943

0.997

−5.70

24

1.123

1.128

−0.47

48

1.653

1.636

1.00

72

1.84

1.865

−1.38

96

1.994

1.968

1.26

120

2.001

2.015

−0.68

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