High temperature and high pressure dynamic galvanic corrosion experiment method and device

Abstract

The invention discloses a high temperature and high pressure dynamic galvanic corrosion experiment method and device. The high temperature and high pressure dynamic galvanic corrosion method is characterized in that evaluation of galvanic corrosion performance of two metal materials coupled in the cyclic dynamic high temperature and high pressure gas- and liquid-phase corrosive media is realized, galvanic corrosion rate is detected, and the connection suitability of the two metal materials, as well as the tightness of the threaded connection, is tested. According to the use and service environment of two metal materials, they are connected by the connecting rod and threaded connection and loaded with a certain torque, and are placed in the cyclic dynamic high temperature and high pressure gas- and liquid-phase corrosive environment. By means of the experiment method and device, the galvanic corrosion rate of the two metal materials coupled can be detected, and the galvanic corrosion damage and the sensitivity factor of the two metal materials coupled can be quantitatively analyzed to test the connection sutability of the two metal materials and the reliability of threaded sealing, the occurrence risk of galvanic corrosion and crevice corrosion can be comprehensively assessed.

Description

technical field [0001] The present invention relates to a high temperature and high pressure dynamic galvanic corrosion test method and device, more specifically, it relates to a high temperature and high pressure dynamic galvanic corrosion test method used in the fields of petroleum, chemical industry and materials. Equipment for high temperature and high pressure galvanic corrosion experiments. Background technique [0002] For metal materials serving in the corrosive environment of the petroleum industry, chemical industry, and material fields, it is necessary to evaluate the high-temperature and high-pressure galvanic corrosion performance of the structure, functional components, and equipment that are coupled with two metal materials, and to master the connection between the two metals. The galvanic corrosion rate, the mechanism of galvanic corrosion and the risk of crevice corrosion are used to optimize the two metal materials for galvanic coupling and test the applica...

AI Technical Summary

Problems solved by technology

[0005] (A) The connection method of the two metal materials is limited, and it is impossible to accurately load a certain value of torque;

[0006] (B) There are differences between the structure and corrosion environment of the galvanic sample and the actual project, which cannot provide a reliable guarantee for the selection and applicability evaluation of on-site metal materials;

[0007] (C) It can only detect whether there is galvanic corrosion after the coupling of two metal materials, but cannot detect the galvanic corrosion damage and crevice corrosion risk after coupling, and cannot evaluate the applicability of the coupling of two metal materials

[0008] In order to solve the problem that the conventional galvanic corrosion experiment cannot meet the actual engineering problem of material selection when two metal materials are coupled, the present invention proposes a new dynamic galvanic corrosion test method with the help of a high-temperature autoclave, and designs a galvanic sample and its clamping device, forming a new experimental method suitable for high temperature and high pressure dynamic galvanic corrosion, which can solve the above problems well

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