A method, device and system for online detection of coating mechanical behavior

Abstract

The invention provides an online detection method, system, computer equipment and computer-readable storage medium for coating mechanical behavior, and relates to the technical fields of material science and mechanical experiments. The system includes an image acquisition device, an environment simulation device, a stress detection device and a coating substrate sample, the coating substrate sample is fixed in the environment simulation device and immersed in the medium solution of the environment simulation device; The coating substrate sample is a metal substrate coated with an organic coating and an anti-corrosion coating; the image acquisition device is used to collect image information of the coating substrate sample; the stress detection device is used to The image information outputs the coating stress of the coated substrate sample. The invention realizes the on-line measurement of the curvature of the coating substrate sample and the real-time detection of the coating stress under different medium solutions and different temperature environments, the measurement device is simple, the data processing is convenient, and an experimental means is provided for the analysis of the mechanical and chemical coupling behavior of the coating.

Description

technical field [0001] The invention relates to the technical field of material science and mechanical experiments, in particular to the detection technology of coating mechanics, and specifically relates to an online detection method, system, computer equipment and computer-readable storage medium of coating mechanical behavior. Background technique [0002] Oil and gas pipelines and offshore engineering equipment usually work in complex medium solution environments. In order to protect metal equipment from corrosion and prolong its service life, organic coatings are often coated on the surface of the equipment. The organic coating and the underlying metal substrate constitute a coating / substrate system. Due to the effect of the medium environment and the effect of thermal mismatch strain, a large stress will be generated inside the coating. Excessive stress will lead to failure behaviors such as buckling, debonding, fracture and peeling of the coating. Therefore, studyin...

AI Technical Summary

Problems solved by technology

Among them, the laser scanning method, the multi-beam stress-sensitive method and the coherent gradient-sensitive method are all measured by laser, which is not suitable for the medium solution environment; the XRD method has complicated equipment, and this method measures the coating mismatch strain point by point, which takes a long time High cost; the calculation accuracy of the digital image correlation method depends on the speckle quality of the sample, and it is difficult to obtain a clear speckle image in a medium solution environment

In addition, although there have been reports on the mechanical behavior of the coating / substrate system in the medium solution environment, usually only the composition change, shape change and damage of the coating after the experiment are obtained, and online experimental data are lacking.

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