Corrosion Amount Estimation Device and Corrosion Amount Estimation Method

A corrosion amount estimation apparatus that estimates a corrosion amount of a metallic material, the apparatus comprising:

• a soil analysis unit adapted to measure soil particle diameters of a plurality of soil samples and acquire a particle diameter distribution of soil in each of the soil samples;
• a corrosion measurement unit adapted to take electrochemical measurements at a plurality of soil moisture percentage values on an electrode containing the metallic material buried in each of the soil samples;
• a soil classification unit adapted to classify the soil in each of the soil samples into a plurality of types based on the particle diameter distribution and calculate class proportions of the plurality of types;
• a corrosion rate calculation unit adapted to calculate a corrosion rate regarding each of the soil samples at each of the soil moisture percentage values based on polarization resistance measured in the electrochemical measurements and identify a local maximum corrosion rate at which the corrosion rate is maximized;
• a corrosion estimation curve generation unit adapted to generate a corrosion estimation curve for use to estimate the corrosion amount of the metallic material using the class proportions and the local maximum corrosion rate regarding each of the soil samples;
• and
• a corrosion amount estimation unit adapted to acquire the class proportions of actual soil in which the metallic material is buried, acquire the local maximum corrosion rate corresponding to the class proportions from the corrosion estimation curve, and estimate the corrosion amount of the metallic material using the local maximum corrosion rate and a period during which the metallic material is buried in the actual soil.