Detection method of surface strain and displacement of marine anticorrosive coating

Abstract

The invention relates to a detection method of surface strain and displacement of a marine anticorrosive coating. The detection method comprises the following steps that speckle particles are marked on the surface of a specimen to be detected, and the specimen is placed in a seawater corrosion device; two industrial imaging devices are placed in the normal plane of a component; the corrosion device is started, and the industrial imaging devices are started to collect digital speckle images on the coating surface; the collected digital images are used as input data for correlation matching calculation, and quantitative deformation data of the coating images in two cameras under the action of seawater corrosion are obtained; and a demarcating plate is placed in the device to demarcate an imaging system, and the three-dimensional shape and accurate deformation information of coating surface deformation are obtained based on the deformation data in the two cameras. According to the detection method of the surface strain and displacement of the marine anticorrosive coating, accuracy is high, and the cost is saved; and the deformation information, caused by corrosion of the anticorrosivecoating under a marine environment caused can be obtained through the method, and the accurate and reliable data are provided for a study on mechanical properties of the marine anticorrosive coating.

Description

Technical field: [0001] The invention relates to the field of engineering detection, in particular to a full-field non-contact detection method for surface strain and displacement of marine anti-corrosion coatings. Background technique: [0002] Seawater is a strong electrolyte with a salt content of about 3%, so the surface of engineering structures serving in it usually needs to be coated with anti-corrosion coatings to resist the corrosion damage of seawater. However, as the service time increases, the surface of the anti-corrosion coating will gradually deform and fall off due to the continuous corrosion of seawater, eventually causing its internal structure to be damaged by rapid corrosion, and even cause serious safety accidents. Therefore, accurately and conveniently detecting the deformation of anti-corrosion coatings in the marine environment has become a key problem that needs to be solved urgently in the field of marine engineering detection. [0003] At present,...

AI Technical Summary

Problems solved by technology

The invention can quantitatively obtain the full-field strain and displacement information on the surface of the test piece under the condition of non-direct contact, and overcomes the problem that the traditional electrical measurement method cannot directly measure the strain and displacement of the structure serving in the marine environment, so that the coating The displacement and strain measurement of the surface is simpler and more convenient. Through the real-time quantitative tracking of the three-dimensional deformation information of the coating surface, the safe service life of the marine anti-corrosion coating can be analyzed to effectively avoid potential safety hazards.

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