A modular electric field fingerprint detection system and detection method based on coupons

Abstract

The invention provides a detection system and a detection method which combine the corrosion coupon method and the electric field fingerprint method. A voltage acquisition electrode matrix and a temperature sensor are arranged on the corrosion coupon, and the coupon is placed in a corrosion environment to be detected synchronously. The on-off between the voltage acquisition electrode matrix and the data acquisition module is controlled by the matrix switch, and the real-time voltage and its change after the excitation current is loaded on the coupon can be detected, which can effectively capture the initiation and development process of localized corrosion, and can effectively control the Localized corrosion is tracked and its corrosion mechanism studied. This modular electric field fingerprint detection system has the advantages of small excitation, high precision, integration, good reliability, and high security. It adopts a high-performance controller, which can be programmed to obtain real-time information according to requirements, and can accurately obtain real-time data of environmental parameters. There is a better temperature compensation system, which is convenient for the study of localized corrosion of devices, equipment and components.

Description

technical field [0001] The invention relates to the technical field of detection, to a detection system and method, in particular to a modular detection system and detection method. Background technique [0002] The corrosion coupon method is the most classic and commonly used method for corrosion research, monitoring and evaluation, and it is most widely used in process industries such as infrastructure construction, shipbuilding and marine engineering, and petrochemical industry. The material of the corrosion coupon is generally similar or the same as that of the object to be monitored; in order to adapt to different monitoring situations, the type of the coupon can be flat, flake, etc.; the direction of the coupon should not affect the flow of the fluid, generally choose the coupon The large plane is parallel to the flow direction. The storage time of the coupons is not fixed, and the duration of the coupons is determined by the degree of corrosion, which generally takes...

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Problems solved by technology

However, if the feed-in current is too large, it will easily cause changes such as the Joule heating effect of the metal test piece, which will interfere with data acquisition, and the impact of the fluctuation of the excitation power itself cannot be ignored. high requirements

In addition, it is usually necessary to configure a high output current power supply separately, the equipment integration is not high, the operation is inconvenient, and the personal safety of the operator also needs to be paid enough attention

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