Evaluation Model of Soil Corrosivity Based on Factor Analysis Method and Entropy Weight Method
In order to evaluate the corrosion of soil to steel structures more accurately,two multivariate statistical methods are used to construct the soil corrosion evaluation model.This paper used factor analysis method to select two principal factors affecting soil corrosivity to steel structure from five indexes of pH value,redox potential,apparent resistivity,polarization current density and mass loss,and used the entropy weight method to assign weight to the scores and compute the scores of the two principal factors,establishing a soil corrosiveness evaluation model.Several application examples show that the results are consistent with the evaluation results of the model,which shows that the model can be popularized.At the same time,the evaluation method provides a new idea for the evaluation of soil corrosivity.
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