Deep sea multichannel corrosion electrochemical in-situ test device and test method

Abstract

The invention provides a deep sea multichannel corrosion electrochemical in-situ test device and test method, and belongs to the field of metal and organic coating material corrosion electrochemical in-situ automatic test in deep sea environment. The test device uses a high-pressure sealing technology for oil field logging; functional elements such as a power supply, a precise analog and digital circuit, a memory and an electrochemical sensor are sealed in a pressure-resistant casing to form a black box type deep sea corrosion electrochemical work station; electrochemical test is performed in seawater with the depth being 3000m; various kinds of measuring data such as corrosion electric potential / current, constant electric potential polarization, cyclic voltammetry curve and alternating current impedance are collected and stored according to set frequencies. The test device has the advantages that the structure is simple and compact; the expandability is high; the in-situ electrochemical test on various metal or organic coating specimens in deep sea environment can be performed at the same time; the storage and recovery operation is simple; the independent power supply is used; high pressure can be resisted; the size is small; the test device can be combined or carried with any deep sea devices in other forms; the service life is long.

Description

technical field [0001] The invention belongs to the technical field of electrochemical in-situ automatic testing of metal and organic coating material corrosion in deep-sea environments, and relates to a deep-sea multi-channel electrochemical in-situ testing device and a testing method thereof. Background technique [0002] With the advancement of science and technology and the depletion of earth's resources, human beings have been seeking to expand the space for deep space, deep sea and deep ground activities. The development and exploration of deep-sea oil and gas, minerals and biological resources, the construction of deep-sea engineering and the development and application of deep-sea equipment have become the key content of the development of my country's marine economy. Today, my country's self-designed and integrated manned submersible "Jiaolong" has dived to a depth of 7,000 meters. Haiyang Shiyou No. 981 semi-submersible deep-water drilling platform, with an operat...

AI Technical Summary

Problems solved by technology

Due to the lack of deep-sea electrochemical testing methods, most of the current real-sea tests use the weightless coupon method, which cannot display or characterize the corrosion kinetics and aging state of materials in the deep sea in real time. Corrosion can only be judged by sampling and analysis after the experiment is over. degree

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