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Table 6 16-mm steel bar diameter model parameter settings (mm)

From: Grading assessment of steel bar corrosion in concrete structures based on naive Bayesian model and spontaneous magnetic flux leakage effect

Rust length

l/mm

Concrete cover

Thickness (mm)

Rust time T/h

Rust rate α

Rust depth

h/mm

Rust width

2a+2b/mm

100

8

12

0.06

1.70

13.40

100

8

24

0.12

3.40

16.80

100

8

36

0.18

5.10

20.21

100

8

48

0.24

6.81

23.61

100

8

60

0.30

8.51

27.01

100

8

72

0.36

10.21

30.42

100

8

84

0.42

11.91

33.82

100

8

96

0.48

13.61

37.22

100

8

108

0.54

15.31

40.63

100

8

120

0.60

17.01

44.03