High-temperature high-pressure constant load stress corrosion experiment method and device

Abstract

The invention discloses a high-temperature high-pressure constant load stress corrosion experiment method and device. The technical scheme are that constant load stress corrosion experiment of metal materials can be conducted in certain stress state under the combined action of high-temperature high-pressure gaseous phase and liquid phase corrosion media, and subjected to combined action of the constant stress, and high-temperature high-pressure gaseous phase and liquid phase corrosion media in experiment process, and evaluation and research on the applicability and action mechanism of the metal material can be conducted under high-temperature high-pressure corrosive environment and tension stress state according to the experiment results. Damage to strength, plasticity and flexibility of the metal materials can be determined in high-temperature high-pressure gaseous phase and liquid phase corrosive environments under the action of any load by utilizing the experiment method and device, the mechanical property damage degree of the metal materials can be obtained in certain stress state and special corrosion environment according to the test result, thus conducting preference of the metal materials and applicability evaluation.

Description

technical field [0001] The present invention relates to a high-temperature, high-pressure, constant-load stress corrosion test method and device, more specifically, it relates to a high-temperature, high-pressure, constant-load stress corrosion test method for metal materials in oil and gas fields. Apparatus for loading stress corrosion experiments. Background technique [0002] In the chemical experiment of metal materials, it is necessary to carry out high temperature, high pressure and constant load stress corrosion experiments on the metal materials used for corrosion resistance equipment, pipelines and devices in the petroleum industry and chemical industry, so as to test the metal materials in a certain stress state, high temperature and high pressure. Under the circumstances, the optimization and applicability evaluation will be carried out. At present, the constant load stress corrosion test method at home and abroad is generally to use the stress ring to carry out ...

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Problems solved by technology

[0005] (A) Using the stress ring for loading, the accuracy of the loading stress cannot be guaranteed;

[0006] (B) The results of stress corrosion in the normal temperature and pressure corrosive environment are very different from those in the on-site high-temperature and high-pressure corrosion environment, which cannot provide reliable guarantee for the selection and applicability evaluation of on-site metal materials;

[0007] (C) It can only detect whether the metal material is broken, and cannot damage the mechanical properties of the metal material under the combined action of high temperature and high pressure gas phase, liquid and other corrosive media under a certain stress state

[0008] In order to solve the problem that the conventional constant load stress corrosion test cannot simulate the actual working conditions on site, the present invention proposes a new high temperature and high pressure constant load stress corrosion test method with the help of a high temperature and high pressure autoclave, and designs a clamping device for stress corrosion samples, forming a It is suitable for the new experimental method of high temperature, high pressure and constant load stress corrosion, which can solve the above problems well

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