Test method for accelerating reproduction of salt spray corrosion pulverization effect of binding post of electric energy meter

Abstract

The invention relates to a test method for accelerating reproduction of the salt spray corrosion pulverization effect of binding posts of an electric energy meter. The method comprises the following steps of: step 1, spraying salt spray to the binding post of the electric energy meter in a standard neutral salt spray test box, and continuously spraying the salt spray for 4 hours; 2, after finishing spraying, transferring the binding post of the electric energy meter into a damp-heat test box, and duration time being 20 h; 3, keeping the binding post of the electric energy meter in the damp-heat test box, and converting from a low-temperature and high-humidity damp stage to a high-temperature and low-humidity drying stage for 4 hours; step 4, maintaining a drying stage, and continuing the drying stage for 48 hours; and 5, repeating the steps 1-4 until a corrosion form distribution type and a corrosion area proportion are close to the actual corrosion form distribution type and corrosionarea proportion. Compared with constant and alternating salt spray test conditions in general standards, the test method has the advantages of higher corrosion speed and greatly improved test efficiency.

Description

technical field [0001] The invention belongs to the technical field of environmental reliability test methods, in particular to a comprehensive test method for salt spray and temperature and humidity, and relates to a test method for accelerating the reproduction of the powdering effect of salt spray corrosion on a terminal post of an electric energy meter. Background technique [0002] For electric energy meters, high salt spray on coasts or islands is a very harsh environmental condition. The terminal posts of electric energy meters are generally made of pure copper or copper-plated material. Under high salt spray conditions, Cl ions react with metals to Corrosion of metallic materials will occur, and this process usually has a certain time-accumulating characteristic. Although the installation of the electric energy meter is protected by the outer layer such as the meter box, there is no sealing measure to block the flow of air. The salt spray in the air will still penetr...

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Problems solved by technology

But on the one hand, the general constant salt spray test does not consider the change of temperature and humidity, and the change of salt spray; on the other hand, the alternating salt spray test method only adds a low temperature and high humidity storage and standard atmospheric conditions Storage, although humidity conditions are taken into consideration, but changes in humidity and high temperature conditions are not considered, and the stress conditions in the actual conditions of the terminal are not reflected, so the reappearance effect of the salt spray test is very weak

Therefore, whether it is a constant salt spray test or an alternating salt spray test, it is difficult to reproduce the real salt spray corrosion pulverization effect, and the test requires a long period, generally 2000h or even longer, and the test efficiency is extremely high. Low

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