Deep sea mud environment corrosion testing apparatus

Abstract

The invention belongs to the technical field of sea natural environment corrosion testing equipment, and relates to a deep sea mud environment corrosion testing apparatus. The bottom of a test frame is fixedly provided with a test sample; the lower ends of four columns of the test frame are aligned with the lower edge of the test sample, and the outer side of one column is fixedly provided with a circular sea mud sampler; a counterweight cast iron plate is arranged on a counterweight slideway prepared on the bottom side surface in the test frame; the upper part of the corresponding counterweight slideway on the right side in the test frame is fixedly provided with an environmental factor test unit and a corrosion test unit; the left side in the test frame is fixedly provided with a coil barrel; a recovery cable is arranged in the coil barrel; the upper part of the test frame is connected with a floating body which is supported and fixed by a floating body bracket; the middle part of the floating body is fixedly provided with two acoustic releasers; and an upper end bracket structure of each of the two acoustic releasers is provided with a suspension circular ring. The invention has the advantages of simple major structure, reliable design principle, large sample measurement amount, high test data quantity, high accuracy and friendly test environment, and is simple to use and operate.

Description

Technical field: [0001] The invention belongs to the technical field of marine natural environment corrosion test equipment, and relates to a test device for metal materials, metal components, non-metal materials, sacrificial anodes, coatings, and microbial corrosion performance evaluation in deep sea mud environments, especially a test device A corrosion test device for deep sea mud environment. Background technique: [0002] The deep sea is rich in oil, gas and mineral resources. According to statistics, two-thirds of the world's existing oil and gas reserves come from the deep sea. At present, developed countries have begun to develop technologies and equipment for deep-sea oil and gas exploration at a depth of about 3,000 meters. China's offshore oil development is in progress. Going to the deep sea, the South China Sea is very rich in oil reserves, but 75% of them are in the deep sea of ​​2000-3000 meters, so it is urgent to carry out the design and development of relev...

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Problems solved by technology

[0003] At present, there are few studies on the corrosion performance of materials in the deep sea mud environment. The main method used is to conduct tests at a depth of more than ten meters in shallow seas. For example, Guo Qilong et al. Corrosivity and polarization curves of carbon steel in sea mud, electrochemical AC impedance spectrum; Guo Gongyu et al. (Electrochemistry, 2001) conducted experiments on real beach smears with different materials in the Qingdao sea area and the Chengdao sea area in the south of the Bohai Sea to study studied the corrosion of steel in sea mud in the northern sea area of ​​China; Wei Hua et al. (Electrochemistry, 2005) studied the electrochemical corrosion behavior of electric resistance welded pipes and seamless steel pipes in different types of sea mud in the Yangtze River Estuary of the East China Sea; Sea mud is tested in the laboratory. For example, Zhang Jinglei et al. (Ocean and Limnology, 2003) studied the electrochemical corrosion characteristics of steel samples in the sea mud-seawater transition zone under indoor simulation conditions; Sun Cheng et al. (Corrosion Science and Protection Technology, 2003) studied the influence of sulfate-reducing bacteria in sea mud on the corrosion of carbon steel under indoor simulated conditions; Wei Aijun et al. (Corrosion and Protection, 2009) carried out embedded test and Electrochemical test; simultaneously the invention patent of CN200710014330.6 and CN201110068384.7, the related device disclosed in the utility model patent of ZL9501797.0 and ZL00214700.9 can realize the simulation of the sea mud environment in the laboratory, but the above two methods both It cannot truly and completely reflect the corrosion performance of materials in the deep sea mud environment

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