KR-20260065937-A - Prediction device, prediction method, and prediction program

KR20260065937AKR 20260065937 AKR20260065937 AKR 20260065937AKR-20260065937-A

Abstract

The prediction device comprises a prediction unit that calculates a first ratio in a first period and a second ratio in a second period for each phase constituting the plating layer based on the respective content of a plurality of components included in the plating layer, calculates the length of the first period until a portion of the corrosion of the plating layer reaches the base steel based on the corrosion ranking of each phase, the first ratio of each phase, and the first corrosion rate of each phase, calculates the length of the second period following the first period based on the corrosion ranking of each phase, the second ratio of each phase, and the second corrosion rate of each phase, and calculates the sum of the length of the first period and the length of the second period as the predicted result of the corrosion resistance of the plating layer.

Inventors

도쿠다 고헤이
고토 야스토
가와모토 고스케

Assignees

닛폰세이테츠 가부시키가이샤

Dates

Publication Date: 20260511
Application Date: 20241024
Priority Date: 20231031

Claims (4)

A prediction unit that calculates a first ratio in a first period and a second ratio in a second period for each phase constituting the plating layer based on the respective content of a plurality of components included in the plating layer, calculates the length of the first period until a portion of the corrosion of the plating layer reaches the substrate steel based on the corrosion ranking of each phase, the first ratio of each phase, and the first corrosion rate of each phase, calculates the length of the second period following the first period based on the corrosion ranking of each phase, the second ratio of each phase, and the second corrosion rate of each phase, and calculates the sum of the length of the first period and the length of the second period as a predicted result of the corrosion resistance of the plating layer. Prediction device equipped with
In paragraph 1, A prediction device in which the second corrosion rate is a rate in which the first corrosion rate is corrected according to the promotion of corrosion of the plating layer by corrosion of the base steel.
It is a prediction method executed by a prediction device, and A step of calculating a first ratio in a first period and a second ratio in a second period for each phase constituting the plating layer based on the respective content of a plurality of components included in the plating layer, calculating the length of the first period until a portion of the corrosion of the plating layer reaches the substrate steel based on the corrosion ranking of each phase, the first ratio of each phase, and the first corrosion rate of each phase, calculating the length of the second period following the first period based on the corrosion ranking of each phase, the second ratio of each phase, and the second corrosion rate of each phase, and calculating the sum of the length of the first period and the length of the second period as a predicted result of the corrosion resistance of the plating layer. Prediction method including
on the computer, A procedure for calculating a first ratio in a first period and a second ratio in a second period for each phase constituting the plating layer based on the respective content of a plurality of components included in the plating layer, and calculating the length of the first period until a portion of the corrosion of the plating layer reaches the substrate steel based on the corrosion ranking of each phase, the first ratio of each phase, and the first corrosion rate of each phase, and calculating the length of the second period following the first period based on the corrosion ranking of each phase, the second ratio of each phase, and the second corrosion rate of each phase, and calculating the sum of the length of the first period and the length of the second period as a predicted result of the corrosion resistance of the plating layer. Prediction program for execution.

Description

Prediction device, prediction method, and prediction program The present invention relates to a prediction device, a prediction method, and a prediction program. This application claims priority based on patent application 2023-186777 filed in Japan on October 31, 2023, and incorporates the contents thereof herein by reference. Since steel corrodes upon contact with the atmosphere, corrosion protection treatments, such as plating, must be applied to the steel to ensure long-term use. Plating-treated steel is cheaper than stainless steel. Recently, with life cycle cost becoming important from the perspective of carbon neutrality, high corrosion-resistant plated steel sheets capable of protecting steel for a long period are attracting attention. As a high corrosion-resistant plated steel sheet, there is a zinc-aluminum-magnesium (Zn-Al-Mg) alloy plated steel sheet (see Patent Documents 1 and 2). FIG. 1 is a drawing illustrating an example of the configuration of a prediction device in an embodiment. FIG. 2 is a drawing illustrating an example of a model of the corrosion form of a Zn-Al-Mg plating layer in an embodiment. Figure 3 is a diagram showing an example of the liquidus temperature of Zn-Al-Mg in an embodiment. Figure 4 is a diagram showing examples of the 1 molar molecular weight and density of each phase in an embodiment. Figure 5 is a diagram showing an example of a database of the area fraction of each phase in an embodiment. FIG. 6 is a flowchart illustrating an example of a process for calculating the attachment weight of each phase in an embodiment. FIG. 7 is a diagram showing examples of the corrosion rates of each phase during the first period in an embodiment. FIG. 8 is a flowchart illustrating an example of a process for calculating the length of a period (first period) during which some corrosion is confirmed on the surface of the plating layer in an embodiment, and the length of a period (second period) after some corrosion has reached the interface between the plating layer and the steel plate. Embodiments of the present invention will be described in detail with reference to the drawings. In the following, a prediction device, a prediction method, and a prediction program are described using a zinc “Zn”-aluminum “Al”-magnesium “Mg” plating layer as an example of a plating layer, but the plating layer in the embodiment is not limited to a Zn-Al-Mg plating layer. FIG. 1 is a drawing illustrating an example configuration of a prediction device (1) in an embodiment. The prediction device (1) is an information processing device that predicts the corrosion resistance of a plating layer, and is, for example, a personal computer and a smartphone terminal. The prediction device (1) is equipped with a memory device (11), a memory unit (12), a prediction unit (13), a display unit (14), and a communication unit (15). The memory device (11) is a non-volatile recording medium (non-transient recording medium). In the memory section (12), a prediction program is deployed from the memory device (11). The prediction unit (13) is a processor, for example, a CPU (Central Processing Unit). The prediction unit (13) is realized as software by executing a prediction program developed from a memory device (11) in a memory unit (12). The prediction program may be recorded on a computer-readable recording medium. A computer-readable recording medium is a non-transient recording medium, such as a portable medium like a flexible disk, an optical-magnetic disk, a ROM (Read Only Memory), or a CD-ROM (Compact Disc Read Only Memory), or a memory device like a hard disk and a solid-state drive (SSD) embedded in a computer system. The prediction unit (13) may be realized using hardware including electronic circuits (electronic circuit or circuitry) using, for example, LSI (Large Scale Integration Circuit), ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device) or FPGA (Field Programmable Gate Array). The prediction unit (13) predicts the corrosion resistance of the plating layer based on the respective contents (each input value) of Zn, Al, and Mg. For example, the prediction unit (13) calculates the ratio of each phase constituting the plating layer and predicts the lifespan (service life) of the plating layer based on the calculated ratio. The display unit (14) is equipped with a display device such as a liquid crystal display. The display unit (14) displays, for example, a prediction result. The communication unit (15) communicates with an external communication device (not shown) through a communication line such as the Internet, LAN (Local Area Network) or WAN (Wide Area Network). The communication unit (15) may, for example, transmit a prediction result to the communication device (not shown). Next, the details of the prediction device, prediction method, and prediction program are described. Ideally, it is desirable to predict the service life of galvanized steel sheets based on a database o