Liquid-film-thickness-controllable thin liquid film corrosion electrochemical testing device and method

Abstract

The invention provides a liquid-film-thickness-controllable thin liquid film corrosion electrochemical testing device and method, and belongs to the technical field of electrochemical testing and humidity corrosion simulation experiments including atmospheric corrosion. The device consists of parts such as an ascending and descending controller, an ascending and descending post, an object carrying table, an ampere meter, an electrode probe, a liquid level controller, an experimental container, a specimen table, a specimen fixture, a temperature probe, a water bath kettle, a gradienter, an electrochemical testing system and horizontal regulation screw blots. By regulating coarse tuning and fine tuning knobs of the ascending and descending controller, the precise control on the liquid level position of a water solution in the experimental container is realized, so that the thin liquid film thickness set within 1000mum is obtained. Meanwhile, the water bath boiler is used for performing constant temperature control on electrochemical specimens and the solution in the experimental container. The thin liquid film which has the set thickness and is obtained by the device is combined with the external electrochemical testing system for performing corrosion electrochemical testing under the set liquid film thickness condition.

Description

technical field [0001] The invention relates to the technical field of thin liquid film corrosion simulation experiment and electrochemical test including atmospheric corrosion, in particular to a thin liquid film corrosion electrochemical test device and method with controllable liquid film thickness. Background technique [0002] The thin liquid film on the surface of metal materials will cause thin liquid film electrochemical corrosion of metal materials. Thin liquid film electrochemical corrosion is one of the most common corrosion phenomena in natural and industrial environments. Atmospheric corrosion is a typical thin liquid film. film corrosion. The temperature difference between the metal material in the humid environment and the environment will cause the moisture in the moisture to condense on the surface of the metal material to form a thin liquid film with a certain thickness. When the thickness of the thin liquid film reaches more than dozens of water molecule l...

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Problems solved by technology

[0003] In the traditional corrosion electrochemical test method, the thickness of the thin liquid film formed on the surface of the metal material is usually measured, but there is no device and method for accurately and effectively controlling the thickness of a specific thin liquid film. Testing is somewhat limited

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