An evaluation test device for corrosion inhibitor film layer of gathering and transportation pipeline

Abstract

The invention belongs to the technical field of corrosive prevention in an acid natural gas gathering and transportation pipeline, and particularly relates to a testing device of a corrosion inhibitor membrane layer for resisting hydrogen sulfide and acid corrosion. An evaluation testing device of a corrosion inhibitor membrane layer of a gathering and transportation pipeline, wherein a high pressure kettle and a gas circulating pump are arranged on a lower pipeline of a loop pipeline, and a gas circular pump is located at the left side of the high pressure kettle; several holes are arranged on the upper pipeline of the loop pipeline; an electrical resistance probe, an electrochemistrical probe, a weightless sample, a hygrothermograph, a pressure gauge and a sampler are orderly placed in the holes; corresponding to the lower part of the weightless sample, a hole is arranged on a pipeline on the upper portion of the loop pipeline, and a thickness measuring probe is placed in the hole; an access opening is arranged on the upper pipeline of the loop pipeline, and the access opening is provided with an atomizing nozzle and connected with a corrosion inhibitor storage tank; an outlet of the corrosion inhibitor storage tank is provided with a boosting pump, and the side pipeline of the loop pipeline is connected with a testing gas steel bottle through the gas valve; the weightless sample is connected with an external electrochemistrical work station through a lead.

Description

technical field [0001] The invention relates to the technical field of internal anti-corrosion of sour natural gas gathering and transportation pipelines, and in particular relates to a test device for evaluating a corrosion inhibitor film resistant to hydrogen sulfide and acid corrosion. Background technique [0002] There are three main anti-corrosion methods for sour gas field gathering and transportation systems: selection of corrosion-resistant materials, inner wall coating or lining, and injection of corrosion inhibitors. The cost of corrosion-resistant materials is high, the construction of coating lining is difficult, and it is easy to age and fall off to cause pipe plugging. Adding corrosion inhibitors can control pipeline corrosion economically, reliably and flexibly, so it is most widely used in pipeline anticorrosion engineering. For this reason, corrosion experts at home and abroad have successfully developed various corrosion inhibitors suitable for sour gas fi...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a performance detection and evaluation test device for acid gas gathering and transportation pipeline corrosion inhibitor performance in view of the problem that the performance of corrosion inhibitor film layer and continuous injection in acid gas field gathering and transportation pipeline system cannot be dynamically and accurately evaluated

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