Abstract: A corrosion rate estimation device for estimating a corrosion rate of a metal disposed in a predetermined environment includes an input unit that inputs water component information including information such as water content (time), temperature, conductivity, soil type, and the like, a corrosion rate estimation model configured to receive the water component information related to a water component contained in the predetermined environment as an input, and estimate the corrosion rate of the metal disposed in the predetermined environment from the water component information, and an output unit that outputs the estimated corrosion rate of the metal to the outside. The corrosion rate estimation model is generated using, for example, a machine learning algorithm such as a random forest, a neural network, or RNN (LSTM).

Abstract: In a first step, a pretreatment for measuring a moisture characteristic of soil is performed. The pretreatment can be removal of moisture from the soil of interest. For example, removing water that is a cause of a soil mass can be the pretreatment. Next, in a second step, the moisture characteristic of the soil subjected to the pretreatment is measured. The moisture characteristic is a water content of the soil. In addition, the moisture characteristic is a matrix potential value at a specified soil water content. Next, in a third step, the corrosion of the metal member buried in the soil is estimated from the measured moisture characteristic.

Abstract: A particle size of soil is measured, a color measurement value related to a color of the soil is measured, and corrosion of a steel material buried in the soil is estimated from the particle size and the color measurement value. In the measurement of the color measurement value, a color value is measured as the color measurement value. In the corrosion estimation, a corrosion rate is obtained from the measured particle size, a corrosion rate magnification is obtained from the measured color measurement value, a corrected corrosion rate is obtained by multiplying the corrosion rate by the corrosion rate magnification, and the corrosion of the steel material is estimated according to the obtained corrected corrosion rate.

Abstract: Provided are a light source that radiates (projects) infrared rays to a surface of a coating film which is an observation target, an infrared camera that captures a thermal image (infrared image) of a place irradiated with the infrared rays, and a display unit that displays the thermal image captured by the infrared camera. The thermal image captured by the infrared camera and displayed on the display unit is an image virtualized by superimposing a state (temperature distribution) of an infrared ray emitted from an object (for example, a coating film of a building) on which the infrared ray is projected in the shape of the object.

Abstract: A corrosion amount estimation apparatus that estimates the corrosion amount of a metal material buried in the ground, the apparatus including: a soil adjustment unit that dries the target soil; a water permeability measurement unit that measures the water permeability of the soil after supplying water to the dried soil; and a corrosion estimation unit that estimates the corrosion amount of the metal material when buried in the soil using the water permeability.

Abstract: A soil parameter required when civil engineering/mechanical simulations for various grounds are performed is appropriately determined. A parameter determination device determines a parameter of a particle model used in a ground analysis system. The parameter determination device includes a triaxial compression test numerical analysis unit configured to determine the parameter so that the adhesive force and the shear resistance angle of a virtual ground respectively match the adhesive force and the shear resistance angle of an actual ground with a predetermined accuracy, and a pull-out test numerical analysis unit configured to determine the parameter so that a ground reaction force coefficient of the virtual ground matches a ground reaction force coefficient of the actual ground with a predetermined accuracy.

Abstract: To repair reinforced concrete easily and at low cost. An anticorrosion method includes infiltrating an anticorrosion solution held inside concrete of reinforced concrete into a vicinity of a reinforcing bar through the concrete to passivate the reinforcing bar, detecting that the anticorrosion solution is infiltrated to a surface of the concrete, and discharging, after detecting the anticorrosion solution, the anticorrosion solution to outside of the concrete to form an anticorrosive coating on a surface of the reinforcing bar.

Abstract: A correlation between environment data at a buried location and magnitude of a corrosion rate of each of a plurality of corrosion samples is obtained. A score based on the magnitude of the corrosion rate is set for the environment data at the buried location of each of the plurality of corrosion samples on the basis of the correlation between the environment data and the magnitude of the corrosion rate. The score set for the environment data is set as a score of the plurality of corresponding corrosion samples. A risk of corrosion of a metal structure to be buried in the buried locations of the plurality of corrosion samples is estimated on the basis of the score set.

Abstract: The corrosion estimation device includes a sensor, a first processing circuit, a second processing circuit, and a third processing circuit. The sensor measures a water content of soil of a target land. The first processing circuit estimates a damping function representing a temporal change in a ratio of an area wetted with water on a surface of a metal structure buried in the target land on the basis of a water content measurement value measured by the sensor. The second processing circuit estimates, from the estimated damping function, a rate increase function that increases the corrosion rate of the metal structure, the rate increase function being derived from a thickness of a water film formed on the surface of the metal structure. The third processing circuit estimates a temporal change function of the corrosion rate given by a product of the damping function and the rate increase function.

Abstract: An object is to support evaluation of corrosion of metal embedded in the ground such that the corrosion can be evaluated with high accuracy even if any type of soil is used. A coarseness/fineness test unit analyzes soil particles of soil that is used to evaluate corrosion of an embedded metallic material, a water supply unit supplies water to the soil, a soil stirring unit stirs the soil supplied with water, and a viscosity test unit measures fluidity of the stirred soil.

Abstract: A corrosion amount estimation apparatus includes a soil analysis unit adapted to acquire a particle diameter distribution in soil in each of plural soil samples; a corrosion measurement unit adapted to take electrochemical measurements at plural 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; 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 and identify a local maximum corrosion rate; a corrosion estimation curve generation unit adapted to generate a corrosion estimation curve; 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 a

Abstract: A first estimation function unit estimates, on the basis of a particle diameter of soil of a target land, a relationship between an underground depth of the land and an oxygen concentration in soil. A second estimation function unit estimates, on the basis of a corrosion rate or a corrosion amount of a target metal near a ground surface of the land and the relationship estimated by the first estimation function unit, a relationship between the underground depth and the corrosion rate or the corrosion amount in the land from a relationship between the oxygen concentration and the corrosion rate or the corrosion amount. A third estimation function unit estimates a corrosion state of a structure constituted of the metal buried in target ground in the land from the relationship estimated by the second estimation function unit.

Abstract: A structure member includes a base formed of metal and a repair layer built in the base. The repair layer includes a plurality of capsules dispersed on the same plane, and a liquid repairing agent is enclosed in the capsules. The repair layer is disposed substantially parallel to a surface on which the structure member is exposed to the outside air. In addition, the repair layer can be disposed at a depth X set from a surface on which the structure member is initially exposed to the outside air. The capsule is formed of a material that breaks when exposed from the base.

Abstract: An anchor is buried in the ground near a place where a utility pole is installed. A guy wire is connected to the utility pole. A guy wire rod couples the anchor and the guy wire. An electrode is buried in the ground near a place where the anchor is buried. A power supply supplies an anti-corrosion current with an underground portion of the guy wire rod and the anchor as a cathode and the electrode as an anode. The power supply includes a photovoltaic cell.

Abstract: A corrosion prediction device that predicts corrosion indicating the degree to which a metal will corrode in an environment, the device including a storage unit which stores a soil sample that simulates the environment and an electrode unit and has a function of repeatedly performing water supply and drainage with respect to the soil sample; the electrode unit including at least one type of metal pieces; a measurement unit that measures, based on change in water content in the environment in one cycle, a corrosion rate of the metal pieces or a value proportional to the corrosion rate of the metal pieces during the change; a calculation unit that integrates the corrosion rate or a value proportional to the corrosion rate over time and calculates an amount of corrosion or a value proportional to the amount of corrosion; and a prediction unit that determines a constant value of K of the power law and a constant value of n of the power law using a difference between the amounts of corrosion or the values proporti

Abstract: A corrosion rate estimation apparatus includes a corrosion rate measurement unit adapted to repeat water supply cycles in which water is supplied to soil in which metal to be evaluated is buried and measure a cycle number of each water supply cycle, one or more time points in each cycle, and a corrosion rate of the metal at the time point(s); a learning unit adapted to find a prediction model by accepting the cycle number, the time point(s) in the cycle, and the corrosion rate(s) as input and using a machine learning algorithm, the prediction model representing a future corrosion rate; and a corrosion rate estimation unit adapted to assign a cycle number and a time point in the cycle at which a corrosion rate is desired to be estimated to the prediction model and estimate a corrosion rate of the metal at the time point.

Abstract: A structure is made of a metal such as a steel material and is buried in the ground. A first wiring is connected to the structure. A second wiring is connected to an electrode. A switch turns on and off a conduction state between the first wiring and the second wiring. In a state where the switch is turned on, the electrode is in a higher potential state as compared to the structure. The electrode can be made of a metal having an ionization tendency lower than that of the metal included in the structure.

Abstract: Provided is a deterioration detection device including a battery including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. Furthermore, the deterioration detection device includes a container that covers and houses the battery and is to be embedded in a metal structure being a target of detecting a corrosion thinning state. Furthermore, the deterioration detection device includes a detection unit that detects a current or a voltage output from the battery in an electromotive state and outputs that the metal structure is corroded and thinned.

Abstract: To provide a technology capable of analyzing soil corrosion of an underground buried metal material. There is provided an electrode for analyzing corrosion of a buried metal material in real time, the electrode including: a metal portion composed of a metal material; a metal fixation portion covering and fixing the metal portion except on an exposed surface thereof; a plurality of particles arranged so as to be in contact with the exposed surface; a gelation substance portion covering the plurality of particles and being in close contact with the exposed surface and the metal fixation portion; and a conduction portion that secures electric conduction with the metal portion, wherein the plurality of particles and the gelation substance portion transmit light.

Abstract: A structure includes a base made of a metal such as a steel material, and a reference portion made of a material that is not corroded in a corrosive environment of the metal. The reference portion is embedded in the base such that one end is exposed to form the same plane as a surface of the base. The reference portion is formed in a rod shape extending from the surface of the base toward the inside of the base.