Table 1: Statistical parameters for and [5, 6].

ParametersCarbon steelWeathering steel
A ( m)BA ( m)B

(a) Rural environment
 Mean value, 34.00.6533.30.498
 Coefficient of variation, 0.090.100.340.09
 Coefficient of correlation, −0.05
(b) Urban Environment
 Mean value, 80.20.59350.70.567
 Coefficient of variation, 0.420.40.300.37
 Coefficient of correlation, 0.680.19
(c) Marine Environment
 Mean value, 70.60.78940.20.557
 Coefficient of variation, 0.660.490.220.10
 Coefficient of correlation, −0.31−0.45