Artificial crevice device for simulating crevice corrosion research in deep-sea environment

Abstract

The invention provides an artificial crevice device for simulating crevice corrosion research in a deep-sea environment. The artificial crevice device for simulating the crevice corrosion research inthe deep-sea environment comprises bolts, angle discs, an upper clamping plate, a lower clamping plate, elastic tightening devices and solid-state three-electrode systems; at least two threaded through holes matched with the bolts are formed in the periphery of the upper clamping plate, and the upper clamping plate is tightly attached to the lower clamping plate by being sleeved and bound with atleast two sets of the elastic tightening devices in a surrounded mode; the bolts are screwed towards the direction of the lower clamping plate through the threaded through holes to form crevices, andscrewing angles can be recorded through the angle discs; and at least one set of the solid-state three-electrode system is installed in the lower clamping plate in a sealing mode, the surfaces of allelectrodes are flush with the attaching surface of the lower clamping plate, and wires connected with the electrodes are guided out through the other side of the lower clamping plate. According to theartificial crevice device for simulating the crevice corrosion research in the deep-sea environment, the structure is simple, the operation is convenient, through the rotation of the bolts on the periphery of the upper clamping plate and the control of the angle discs, the crevices with different spacing and opening angles can be precisely controlled to be formed, and real-time acquisition of electrochemical information at different positions in the crevices in the high-hydrostatic sea water environment can further be realized.

Description

technical field [0001] The invention relates to the field of crevice corrosion test devices for simulating deep sea environments, in particular to an artificial crevice device capable of performing electrochemical tests in seawater environments with high hydrostatic pressure and with adjustable crevice opening angles. Background technique [0002] As my country's "Jiaolong" deep-sea submersible breaks through the 7,000-meter mark, the functions of deep-sea prospecting, seabed high-precision topographic survey, suspicious object detection and capture, and deep-sea biological investigation have been initially realized. Going to the deep sea has become an important development for our country. strategy. With the development of deep-sea technology, the importance of deep-sea corrosion research is also increasing. In the extreme environment of the deep sea, the failure of any component may have fatal consequences. Especially for stainless steel, aluminum alloy and other metal ma...

AI Technical Summary

Problems solved by technology

However, the device is relatively complicated, and its open solution system cannot simulate the high hydrostatic pressure seawater environment, and the reference electrode and auxiliary electrode are far away from the working electrode, and are not actually in the solution environment inside the gap, so the electrochemical information of the test It does not truly reflect the electrochemical process under the special solution conditions (lack of oxygen, difficulty in liquid flow, etc.) inside the gap

In addition, the shape of the slit is also single, and the width of the slit can only be adjusted by placing a raised PTFE pressure head on the surface, and the opening angle of the slit in a certain direction cannot be changed.

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