摘要
The corrosion behavior of carbon steels and weathering steels was investigated in a tropical marine environment.And both exhibited similar corrosion weight-loss behavior in tropical marine environments.Corrosion weight loss(W)as a function of exposure time(t)can be calculated using the power function,W=A^tn.The values of the initial corrosion rate,A,and corrosion tendency,n,can be easily obtained by taking the logarithm of the power equation.However,the corrosion rust-layer structure of the two materials was quite different.The rust layer of carbon steel presents a single-layer structure.Meanwhile,the rust layer of weathering steel exhibits a single-layer structure after exposure for about 24 months and then gradually evolves into a double-layer structure.The main corrosion products of the steels areβ-FeOOH,γ-FeOOH,and Fe3O4 in the initial stage of exposure.In the rust layers,α-FeOOH appeared after 12 months of exposure.
