Galvanic corrosion test device used in high-temperature high-pressure environment

Abstract

The invention discloses a galvanic corrosion test device used in a high-temperature high-pressure environment. The galvanic corrosion test device comprises a sleeve-shaped connector, wherein the lowerend of the connector is located in an outer back cap, and the outer wall of the lower end of the connector is sleeved with at least two metal sleeves; an insulation isolation sleeve is arranged between every two adjacent metal sleeves; radial threaded holes and axial threaded holes are formed in the metal sleeves; at least two strip-shaped through holes are formed in the wall surface at the lowerend of the connector; wire clamps are connected to the radial threaded holes of the metal sleeves; and the wire clamps are used for being connected with corresponding working electrodes. The invention aims to provide the galvanic corrosion test device used in the high-temperature high-pressure environment, and solves the problem that the sealing performance and safety of an existing testing technology are relatively poor, and the problem that test result is poor in accuracy and the test error cannot be controlled easily caused by instability of the mounting position of a three-electrode system; and a metal material galvanic corrosion test function by utilizing an electrochemical method and a weight loss method in the high-temperature and high-pressure working conditions can be realized.

Description

technical field [0001] The invention belongs to the field of test instruments, and relates to the sensitivity test of galvanic corrosion of metal materials, in particular to an electrode system device for evaluating the sensitivity of galvanic corrosion under high temperature and high pressure environment. Background technique [0002] With the in-depth development of oil and gas fields at home and abroad, the service environment of downhole pipe strings and surface oil and gas facilities is becoming increasingly harsh, and corrosion failure problems occur frequently. Especially when metals of different materials are in contact with each other, if the potential difference is large, galvanic corrosion will occur, which will accelerate the corrosion of metal materials with lower potentials and cause failure. Therefore, when designing material selection, it is necessary to evaluate the risk of galvanic corrosion for two metals that are in contact with each other, especially whe...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a galvanic corrosion test device used in a high-temperature and high-pressure environment, which solves the problem of poor airtightness and safety of the existing test technology, and the accuracy of the test results due to the unstable installation position of the three-electrode system The problem of poor performance and difficult control of experimental error is realized, and the function of using electrochemical method and weight loss method to test the galvanic corrosion of metal materials under the condition of high temperature and high pressure is realized.

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