Method, device and system for evaluating corrosion resistance of zinc-aluminum coating

Through gel test paper color reaction and micro-sampling colorimetry, combined with a multiple regression model, the efficiency and reliability issues of zinc-aluminum coating anti-corrosion performance testing were solved, and rapid, low-cost evaluation and early warning of zinc-aluminum coating anti-corrosion performance were achieved.

CN120668561APending Publication Date: 2025-09-19ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID JIBEI ELECTRIC POWER CO LTD +2
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Patent Information

Application Number
CN202510649089.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-20
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

In the existing technology, the anti-corrosion performance testing technology of zinc-aluminum coatings is inefficient and cannot quickly, cost-effectively and non-destructively evaluate the anti-corrosion performance of zinc-aluminum coatings on site, especially the early warning technology after coating failure is insufficient.

Method used

The anti-corrosion performance of zinc-aluminum coating was evaluated by gel test paper colorimetric reaction combined with microsampling colorimetry and a multiple regression model of color development time, color depth, zinc content and aluminum content.

Benefits of technology

It achieves rapid and reliable evaluation of the anti-corrosion performance of zinc-aluminum coatings, reduces testing costs, simplifies operating procedures, avoids environmental interference, and can provide early warning and intuitive judgment of protection effects.

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Abstract

The invention provides a method, a device and a system for evaluating the corrosion resistance of a zinc-aluminum coating. The method comprises the following steps: dividing a to-be-detected zinc-aluminum coating into a developing area and a sampling area; gel test paper is attached to the color development area, the color development time and the color depth are determined, and the gel test paper comprises potassium thiocyanate and sodium fluoride; coating surface powder is obtained from the sampling area, and the zinc content and the aluminum content of the to-be-detected zinc-aluminum coating are determined by applying the coating surface powder; determining an anti-corrosion performance evaluation result according to the anti-corrosion performance evaluation model, the developing time, the color depth, the zinc content and the aluminum content; the anti-corrosion performance evaluation model is obtained based on batch training samples and actual anti-corrosion index fitting, the training samples comprise the developing time, the color depth, the zinc content and the aluminum content of the historical zinc-aluminum coating, and the reliability of anti-corrosion performance evaluation of the zinc-aluminum coating can be improved on the basis of ensuring the anti-corrosion performance evaluation efficiency of the zinc-aluminum coating.
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