Predicting the corrosion loss over time in different environments is challenging because the corrosion process develops over time and is influenced by multiple environmental factors simultaneously. Conventional regression analysis is not applicable because it has several limitations in dealing with multilevel structured data. In this paper, the hierarchical linear modelling method is employed instead. A two-level linear growth model is built to analyse the individual corrosion growth and the corrosion effects of the environment on carbon steel, zinc, and copper. Environmental factors that have important impact on the corrosion process are distinguished. By including the corrosion time and environmental factors as predictor variables, the model predictions are in good agreement with the experiments. The uncertainty of the corrosion data is quantitatively described and the confidence intervals are obtained. Then the long-term corrosion loss is predicted with power-linear corrosion kinetic model and corrosion-induced damage risks are analysed.
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