A thin liquid film corrosion test method with automatic control of liquid film thickness

A technology of liquid film thickness and corrosion test, applied in the direction of weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc. The thickness of the liquid film on the surface of the electrode is changed, so as to achieve the effect of high degree of automation, improved performance and life, and good reproducibility
CN104990863BActive Publication Date: 2018-01-09SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
Publication Date
2018-01-09

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Abstract

The invention discloses a thin liquid film corrosion test method that can automatically control the thickness of the liquid film. The device used in the method includes an iron stand, spiral micrometers I and II and corresponding probes I and II, and the liquid storage tank is connected to an electromagnetic The valve is connected to the electrolyzer. Before the test, connect the line first, connect the multimeter to the circuit where the screw micrometer Ⅰ and the working electrode are; Needle Ⅰ and Ⅱ set the thickness of the liquid film; when the official measurement is made, the liquid level can be automatically replenished by turning on and off the solenoid valve. The method can automatically, conveniently and accurately control and keep the thin liquid film at a certain thickness within a certain range, and the thickness can be adjusted conveniently, so as to realize the electrochemical data collection of metal corrosion under a certain liquid film thickness, which is more conducive to research in Corrosion mechanism of metals under different film thicknesses.
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Description

technical field

[0001] The invention relates to the improvement of a thin liquid film corrosion test, in particular to a thin liquid film corrosion test method capable of automatically controlling the thickness of a liquid film, and belongs to the technical field of electrochemical corrosion. Background technique

[0002] Atmospheric corrosion is one of the most common corrosion phenomena of metal materials, which is extremely harmful; thin liquid film corrosion in atmospheric corrosion is an important research direction of corrosion research. A very thin water film is usually formed on the metal surface placed in the atmospheric environment. When the thickness of the water film reaches 20-30 molecules thick, the electrolyte film required for electrochemical corrosion is formed, that is, a thin liquid film. The thin liquid film often contains water-soluble corrosive electrolytes and dissolved corrosive gases, which have a great impact on metal corrosion; at the same time, th...

Claims

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