Abstract
The durability of steel pipeline system decreases easily due to such corrosion effects in soil conditions. For effective maintenance and management of pipeline system, it is necessary to evaluate not only the water-flow but also the degree of damage. Corrosion of steel pipe materials under soil conditions is dependent on the degree of difference in the electrical potentials, and could be evaluated by applying the electro-chemical method. In this study, the damaged steel pipeline system that had been used for only 10 years was examined, based on corrosion characteristics monitoring using electric potential between pipeline and soil conditions. Thus, the experimental results show that degree of damage in service steel pipeline system could be estimated using electric potential index. As for the relationship electric potential, corrosion velocity and water leak accidents in pipeline were evaluated.
