Evaluation method and test device for defects and corrosion resistance of three-cavity coating on fuel cell bipolar plate

By using electrochemical testing and a test device that simulates corrosion solutions at the three-chamber mouth of the fuel cell bipolar plate, the problem of difficulty in evaluating coating defects and corrosion resistance in the prior art is solved, and fast and accurate test results are achieved, and testing efficiency is improved.

CN119757507APending Publication Date: 2025-04-04SUNRISE POWER CO LTD
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Patent Information

Application Number
CN202411882364.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

The prior art is difficult to effectively evaluate the coating defects and corrosion resistance at the three-chamber mouth of the bipolar plate of fuel cell, resulting in the risk of corrosion resistance not meeting the standards and poor stability in practical applications.

Method used

It provides an evaluation method and test device for defects and corrosion resistance of three-chamber oral coatings of fuel cell bipolar plates. Through two-stage electrochemical tests and a test device that simulates corrosion solutions, it quickly evaluates the defect degree and corrosion resistance of three-chamber oral coatings.

Benefits of technology

The rapid and accurate evaluation of the defects and corrosion resistance of the three-chamber oral coating of bipolar plates is achieved, which improves the testing efficiency and avoids the time-consuming and high cost problems in traditional methods.

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Abstract

The present invention provides an evaluation method and test device for defects and corrosion resistance of three-cavity coating of fuel cell bipolar plate, the test device comprises a test cell body; a solution loading cell and a solution conduction chamber are arranged inside the test cell body; a sample groove is provided at the bottom of the test cell body; the solution conduction chamber is used to connect the solution loading cell and the sample groove; the test sample is placed in the sample groove; the sealing bottom plate is used to clamp and seal the test sample in the solution-sample slit area, and the sealing in the slit area is achieved by a sealing glue line; the evaluation method performs a two-stage electrochemical test, compares the two-stage curves to obtain the corresponding judgment results, and gives 7 conclusions to achieve the evaluation of defects and corrosion resistance of three-cavity coating of fuel cell bipolar plate. The technical solution of the present invention solves the problem that there is no test device for corrosion resistance of three-cavity coating of bipolar plate, and there is no method for evaluating the degree of coating defects and corrosion resistance at this position.
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