Modular electric-field fingerprint detection system based on coupon and detection method

Abstract

The invention provides a detection system with combination of a coupon corrosion method and an electric-field fingerprint method and a detection method. The detection system is characterized in that avoltage acquisition electrode matrix and a temperature sensor are arranged on a corrosion coupon and the coupon is placed in a corrosion environment detected synchronously. A matrix switch is used for controlling switching on and switching off between the voltage acquisition electrode matrix and a data acquisition module to detect real-time voltage and the change of the voltage of the coupon after exciting current is loaded, so that the process of initiation and development of local corrosion can be effectively captured, the local corrosion can be effectively tracked and the corrosion mechanism can be researched. The modular electric-field fingerprint detection system has the advantages of low excitation, high accuracy, integration, good reliability and high safety and the like; by adoption of a high-performance controller, real-time information can be obtained by programming according to the needs, real-time data of ambient parameters can be accurately obtained, and a better temperature compensating system is arranged, so that convenience is brought for study on local corrosion of devices, equipment and members.

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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