# US 2024/0201161 A1 · Corrosion estimation device and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201161 A1 - Document ID: US20240201161A1 - Status: Published application - Kind: A1 - Application number: 18/555,806 - Filed: 2021-05-21 - Published: 2024-06-20 - Earliest claimed: 2021-05-21 - Assignees: Nippon Telegraph and Telephone Corporation - Applicants: Nippon Telegraph and Telephone Corporation - Inventors: Shingo Mineta; Shota Oki; Mamoru Mizunuma; Soichi Oka - Web page: https://patentgrep.com/patent/US20240201161A1 ## CPC - G01N 33/24: Earth materials (G01N33/42 takes precedence) - G01N 17/00: Investigating resistance of materials to the weather, to corrosion, or to light - G01N 17/02: Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## 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. ## Claims ### Claim at position 1 1-4. (canceled) ### Claim 5 A corrosion estimation method, comprising: estimating, based a particle diameter of soil of a target land, a relationship between an underground depth of the target land and an oxygen concentration in soil; and estimating, based a corrosion rate of a target metal at a ground surface of the target land and the relationship between the underground depth and the oxygen concentration, a relationship between the underground depth and the corrosion rate from a relationship between the oxygen concentration and the corrosion rate. ### Claim 6 (depends on 5) The corrosion estimation method according to claim 5, further comprising: estimating a corrosion state of a structure constituted of the target metal from the relationship between the underground depth and the corrosion rate. ### Claim 7 (depends on 6) The corrosion estimation method according to claim 6, wherein the structure is buried in the target land. ### Claim 8 A corrosion estimation device, comprising: a central processing unit; and a storage device storing a program to be executed by the central processing unit, the program including instructions to: estimate, based a particle diameter of soil of a target land, a relationship between an underground depth of the target land and an oxygen concentration in soil; and estimate, based a corrosion rate or a corrosion amount of a target metal at a ground surface of the target land and the relationship between the underground depth and the oxygen concentration, a relationship between the underground depth and the corrosion rate or the corrosion amount from a relationship between the oxygen concentration and the corrosion rate or the corrosion amount. ### Claim 9 (depends on 8) The corrosion estimation device according to claim 8, wherein the program includes further instructions to: estimate a corrosion state of a structure constituted of the target metal from the relationship between the underground depth and the corrosion rate or the corrosion amount. ### Claim 10 (depends on 9) The corrosion estimation device according to claim 9, wherein the structure is buried in the target land. ### Claim 11 (depends on 8) The corrosion estimation device according to claim 8, wherein the instructions to estimate, based the corrosion rate or the corrosion amount of the target metal at the ground surface of the target land and the relationship between the underground depth and the oxygen concentration, the relationship between the underground depth and the corrosion rate or the corrosion amount from a relationship between the oxygen concentration and the corrosion rate or the corrosion amount comprises instructions to: estimate, based the corrosion rate of the target metal at the ground surface of the target land and the relationship between the underground depth and the oxygen concentration, the relationship between the underground depth and the corrosion rate from a relationship between the oxygen concentration and the corrosion rate. ### Claim 12 (depends on 8) The corrosion estimation device according to claim 8, wherein the instructions to estimate, based the corrosion rate or the corrosion amount of the target metal at the ground surface of the target land and the relationship between the underground depth and the oxygen concentration, the relationship between the underground depth and the corrosion rate or the corrosion amount from a relationship between the oxygen concentration and the corrosion rate or the corrosion amount comprises instructions to: estimate, based the corrosion amount of the target metal at the ground surface of the target land and the relationship between the underground depth and the oxygen concentration, the relationship between the underground depth and the corrosion amount from a relationship between the oxygen concentration and the corrosion amount. ### Claim 13 A corrosion estimation method, comprising: estimating, based a particle diameter of soil of a target land, a relationship between an underground depth of the target land and an oxygen concentration in soil; and estimating, based a corrosion amount of a target metal at a ground surface of the target land and the relationship between the underground depth and the oxygen concentration, a relationship between the underground depth and the corrosion amount from a relationship between the oxygen concentration and the corrosion amount. ### Claim 14 (depends on 13) The corrosion estimation method according to claim 13, further comprising: estimating a corrosion state of a structure constituted of the target metal from the relationship between the underground depth and the corrosion amount. ### Claim 15 (depends on 14) The corrosion estimation method according to claim 14, wherein the structure is buried in the target land.