Method for evaluating cavitation erosion resistance of paint coating based on ultrasonic technology

By using ultrasonic technology in the laboratory to simulate the cavitation environment, combined with high-speed photography and image processing algorithms, the damage time and damaged area of ​​the paint coating are accurately measured, and the problem of difficult to quickly and accurately evaluate the cavitation resistance evaluation method of paint coatings in the existing technology is solved, and efficient and scientific evaluation methods are achieved.

CN119845841APending Publication Date: 2025-04-18HARBIN ENG UNIV
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Patent Information

Application Number
CN202510055386.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-14
Publication Date
2025-04-18

AI Technical Summary

Technical Problem

The existing methods for cavitation resistance evaluation of paint coatings are difficult to quickly and accurately evaluate in laboratory environments, with long test cycles, environmental limitations, lack of reliability and repeatability, and it is difficult to test the cavitation resistance of coatings separately.

Method used

The evaluation method based on ultrasonic technology is adopted to prepare samples through a unified dipping process. In the experimental environment constructed by combining specific experimental equipment, an ultrasonic generator is used to generate a cavitation bubble group to simulate a cavitation environment. Combined with high-speed photography, image processing algorithms and ultra-deep field microscopy and other means, the initial breaking time point and damaged area of ​​the paint coating are accurately obtained.

Benefits of technology

It effectively overcomes the shortcomings of the existing evaluation methods, and realizes the rapid and accurate evaluation of the cavitation resistance of paint coatings in the laboratory without the time-consuming actual environmental exposure experiment, which greatly shortens the test cycle and improves the accuracy and reliability of the evaluation.

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Abstract

The invention relates to a paint coating cavitation erosion resistance evaluation method based on an ultrasonic technology, belongs to the technical field of paint coating performance evaluation, and solves the problem that in the prior art, it is difficult to comprehensively observe and accurately simulate an ultrasonic bubble dynamic process in a laboratory. The method comprises the following steps: preparing a sample wafer on a steel plate by adopting a unified process, placing the sample wafer in an experimental water tank, generating a cavitation bubble group by using an ultrasonic generator to simulate cavitation erosion, collecting data through equipment such as a high-speed camera, a hydrophone and a pressure sensor, and obtaining damage time and area by virtue of an image processing algorithm and a super field depth microscope. And the cavitation erosion resistance is analyzed and evaluated through data processing. Rapid and accurate evaluation can be realized in a laboratory, the test period is shortened, and the cost is reduced; the evaluation accuracy, reliability and repeatability are improved; and a scientific basis can be provided for coating research and development, quality control and engineering application.
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