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Aluminum alloy local corrosion evaluation device

A localized corrosion and evaluation device technology, which is applied to measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve the problem of not being able to obtain the initial dynamics of pitting corrosion development

Active Publication Date: 2017-10-03
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

Then develop a local corrosion evaluation device that can observe the development of local corrosion morphology at the same time during the electrochemical test. The morphological development of pitting corrosion not only solves the problem that the traditional electrochemical testing technology cannot obtain the initial dynamics of pitting corrosion development, but also makes up for the limitations of electrochemical testing in micro-area electrochemical testing technology

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  • Aluminum alloy local corrosion evaluation device
  • Aluminum alloy local corrosion evaluation device

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Embodiment Construction

[0021] The invention provides an evaluation device for local corrosion of aluminum alloy, which includes a simulated environment unit and a real-time corrosion observation unit. The observation unit includes a real-time observation microscope and a corrosion real-time observation system main body.

[0022] Wherein, the real-time observation microscope selects an eyepiece with a relatively large depth of field and a resolution of 1 micron. The upper end of the microscope fixing device is fixed on the main frame of the observation system, and the eyepiece is suspended above the observation window through the observation channel for real-time observation. The lower end of the microscope bracket fixing device is fixed on the top of the observation channel, and a certain force is given to the observation channel, which is applied to the lower end of the anode chamber through the edge of the observation window, so that the anode chamber and the working surface of the anode sample emb...

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Abstract

The invention provides an aluminum alloy local corrosion evaluation device. The device comprises an environment simulation unit and a corrosion real-time observation unit. The environment simulation unit comprises an occluded anode, a macroscopical cathode, an auxiliary electrode, a reference electrode device and a simulated solution tank. The corrosion real-time observation unit comprises a real-time observation microscope and a corrosion real-time observation system main body. The device realizes aluminum alloy material local corrosion simulation and local corrosion morphology real-time observation simultaneously, acquires local corrosion generation and development processes and a form change process of an aluminum alloy material in the simulative environment and realizes local corrosion evaluation of the aluminum alloy material in a marine environment and other simulative environments.

Description

technical field [0001] The invention belongs to the field of metal material corrosion test methods, in particular to a test method and device for localized corrosion of aluminum alloys in marine environments. Background technique [0002] Aluminum and aluminum alloys have low density, good mechanical properties, processing properties, thermal conductivity, electrical conductivity and corrosion resistance, so they are widely used in ships, which can reduce the weight of ship structures, increase navigation speed and resist seawater corrosion. It plays an important role in reducing energy consumption and so on. Corrosion resistance is one of the important indicators affecting the application of aluminum alloys in marine environments, and most aluminum alloys show excellent corrosion resistance in marine environments. This is not only due to the role of the protective passivation film, but also to a considerable extent related to the high hydrogen evolution overpotential on th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02G01N17/00
CPCG01N17/006G01N17/02
Inventor 张慧霞仝宏韬冯昌周娟
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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