New method to directly assess the corrosion risk of water pipes
- Soil investigation using high-frequency AC resistivity measurement -
Summary of AIST Press Release on July 11, 2017
Recently, corrosion of aging water pipes has become a big social problem and the development of assessment measures for their deterioration rate is an urgent issue. Corrosion risk of pipes closely relates to the electrical resistivity of the soil around them, but its measurement takes much costs, time and effort because it needs to excavate the road to get soil samples.
Motoharu Jinguuji (Exploration Geophysics Research Group) has developed a high-frequency AC resistivity survey system that can directly measure the resistivity of soil around buried water pipes from the pavement surface without excavating the road. The new method to efficiently assess the corrosion risk is expected to greatly contribute to determining the priority in replacing aging water pipes.
Measurement on a paved road using the high-frequency AC resistivity survey system