Assessment of soil characteristics on external corrosion of water pipes

The goal of this study is to present an external pit corrosion rate() model with considering both the age of pipe and the soil characteristics. The correlation of nonlinear exponential model among conventional empirical models was a little higher than other empirical models in the prediction of according to the age of pipe. However, there has been a limit to predict Peer with the model by using only a pipe age since installation as a variable. The soil analysis results from sixty nine samples showed that all of the samples were non corrosive in the assessment of ANSI/AWWA scoring system. The correlation of soil corrosion factors and was also low. The application result of linear and nonlinear regression models that soil characteristics only showed a low correlation with Proposed nonlinear regression model in this study, with considering both the age of pipe and the soil characteristics, showed a little higher correlation () than conventional model.