High-speed moisture corrosion loop experimental device for simulating corrosion environment in natural gas pipeline

Abstract

The invention provides a high-speed moisture corrosion loop experimental device for simulating corrosion environments in a natural gas pipeline, and belongs to the technical field of corrosion tests.The device comprises a deaerating system, an external gas supply system, a gas phase circulating system, a liquid phase filling system, an external control system, a heating and insulating system, anexperimental test system, a waste liquid and waste gas treatment system and the like. The device has the advantages that the conditions such as internal medium flow state, flow speed, pressure and temperature of the natural gas pipeline can be simulated; the operating corrosion environments of low water content, high gas phase flow speed and high wall surface shear force station are represented tothe maximum extent, and corrosion behavior study and corrosion inhibitor evaluation can be realized by an inductance probe, electrochemical testing and a corrosion coupon; and the high-speed moisturecorrosion loop experimental device has an important significance for application of corrosion mechanism study of the natural gas pipeline and protecting methods for corrosion inhibitors and the like.

Description

technical field [0001] The invention relates to the technical field of corrosion tests, in particular to a high-speed moisture corrosion loop test device for simulating the internal corrosion environment of natural gas pipelines. Background technique [0002] In recent years, with the continuous development of the oil and gas industry, the corrosion of oil and gas pipelines has attracted increasing attention, especially with the development of deep-sea oil and gas fields, to accurately simulate the internal corrosion conditions of natural gas pipelines for scientific material selection and corrosion inhibitor application, It has become one of the difficulties in engineering practice and research. In view of the high corrosion risk of deep-sea natural gas pipelines, there are many methods for corrosion environment simulation and corrosion inhibitor evaluation, but the corrosion simulation of high-speed wet gas conditions inside natural gas pipelines is still very challenging,...

AI Technical Summary

Problems solved by technology

Among them, the rotating disk electrode (RCE) characterizes the corrosion inhibitor effect through medium and low speed and electrochemical testing, which is difficult to truly reflect the high gas phase flow rate and high wall shear force working conditions in the pipeline, and there is often a gap between the experimental data and the actual situation. Only suitable for corrosion inhibition mechanism research

The impact sputtering method is suitable for strong erosion under pure liquid phase conditions and simulates full water phase conditions. However, for natural gas pipeline conditions with low water content and high gas phase flow rate, it is difficult to simulate actual working conditions with full water phase erosion. Only suitable for evaluating the effect of simulated high shear stress on corrosion inhibitors

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