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A device for evaluating local corrosion of aluminum alloys

A technology for local corrosion and evaluation devices, which is used in measurement devices, weather resistance/light resistance/corrosion resistance, instruments, etc.

Active Publication Date: 2020-09-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • A device for evaluating local corrosion of aluminum alloys
  • A device for evaluating local corrosion of aluminum alloys

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Embodiment Construction

[0022] The invention provides a device for evaluating local corrosion of aluminum alloy, which includes a simulated environment unit and a real-time corrosion observation unit. The simulated environment unit includes a blocked anode, a macro cathode, an auxiliary electrode, a reference electrode device, and a simulated solution pool. The observation unit includes a real-time observation microscope and the main body of the corrosion real-time observation system.

[0023] Wherein, the real-time observation microscope selects an eyepiece with a larger depth of field with a resolution of 1 micron, the upper end of the microscope fixing device is fixed on the main support 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 holder fixing device is fixed on the top of the observation channel, and a certain force is given to the observation channel, which is applied...

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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 local corrosion of aluminum alloys used 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, reducing the weight of ship structures, improving sailing speed and seawater corrosion resistance. Capacity, reducing energy consumption, etc. play an important role. Corrosion resistance is one of the important indicators that affect the application of aluminum alloys in the marine environment. Most aluminum alloys exhibit excellent corrosion resistance in the marine environment. This is not only due to the role of the protective passivation film, but to a considerable extent is also related to the high overpotential of hydrogen evolution on ...

Claims

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Application Information

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Patent Type & Authority Patents(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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