Corrosion detection method and corrosion detection device

Abstract

The invention discloses a corrosion detection method and a corrosion detection device, and belongs to the field of pipelines, and the method comprises the following steps: inputting a preset excitation signal to a to-be-detected pipe section through a vibration exciter; collecting a first natural vibration frequency of the to-be-detected pipe section through a vibration detector; determining the first mass of the to-be-detected pipe section based on the first natural vibration frequency and the parameters of the to-be-detected pipe section; inputting a preset excitation signal to the corroded pipe section through a vibration exciter after the to-be-tested pipe section is converted into the corroded pipe section for the preset operation time; collecting a second natural vibration frequency of the corroded pipe section through the vibration detector; based on the second natural vibration frequency and the parameters of the corrosion pipe section, determining the corresponding relation between the second mass of the corrosion pipe section and the parameters of the corrosion pipe section; and determining a difference value between the first quality and the second quality based on the corresponding relationship and the first quality. The problem that the obtained pipeline corrosion result is possibly inaccurate in the prior art is solved, and the effect of improving the accuracy of the pipeline corrosion result is achieved.

Description

technical field [0001] The present application relates to the field of pipelines, and in particular, to a corrosion detection method and a corrosion detection device. Background technique [0002] In the oil and gas industry, pipelines or storage tanks used to store and transport crude oil, natural gas and other fluids will cause chemical reactions between the pipelines or storage tanks and the fluid during the application process to cause corrosion or other reasons. This leads to the aging and quality reduction of carriers such as pipes or storage tanks. After the quality of the corrosion site is reduced, the walls of carriers such as pipes or storage tanks become thinner, and the strength and stiffness of carriers such as pipes or storage tanks are reduced. When the corrosion is severe, carriers such as pipes or storage tanks will be damaged to form gaps, resulting in fluid leakage from the gaps. Therefore, it is particularly important to detect the corrosion degree of th...

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Problems solved by technology

[0004] However, the corrosion coupons in the corrosion detection device in the above-mentioned related art are corroded by being set inside the pipeline and contacting with the fluid. Determining the degree of corrosion of the pipeline, the obtained pipeline corrosion results may not be accurate

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