Bent pipe flushing corrosion appearance in-situ online collection and electrochemical detection system

Abstract

The invention discloses a bent pipe flushing corrosion appearance in-situ online collection and electrochemical detection system, which comprises an experiment bent pipe and an electrochemical detection device, wherein the experiment bent pipe is divided into an observed part and an observing part; the inner surface of the observed part of the experiment bent pipe is provided with a plurality of experiment test piece installing grooves; experiment test pieces are fixed in the installing grooves; a reference electrode, an auxiliary electrode and the experiment test pieces form a three-electrodesystem; the electrochemical detection device performs electrochemical detection according to the auxiliary electrode, the reference electrode and the experiment test pieces connected with the electrochemical detection device; the observing part is provided with an observing hole; through an endoscopic electric zooming digital microscope, a corrosion appearance image is obtained in real time. Thereal-time in-situ online detection of the experiment bent pipe can be realized; the artificial interference due to experiment test piece taking-down in the experiment process is avoided. Meanwhile, the corrosion appearance information collection is combined with the electrochemical detection; and the detection efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of erosion corrosion experiments, in particular to an in-situ on-line acquisition and electrochemical detection system of the erosion corrosion morphology of an elbow. Background technique [0002] The elbow is the weak link of erosion corrosion in oil and gas transportation pipelines. Due to the interaction of mechanical factors and chemical factors, the risk of failure of the elbow increases. Therefore, it is of great practical significance to study the law of erosion corrosion at the elbow. At present, the devices for studying pipeline erosion and corrosion are mainly divided into rotating electrode devices, jet-type erosion-corrosion devices, and pipe-flow erosion-corrosion rings. Among them, the actual operating conditions of the rotating electrode devices and jet-type erosion-corrosion devices are quite different from those of pipelines. Therefore, The actual erosion and corrosion conditions cannot be ...

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Problems solved by technology

In the Chinese Invention Patent Application Publication No. CN104634684B, a kind of elbow erosion corrosion test system is disclosed, which uses the electrochemical detection method and the weight loss method, but the weight loss method must remove the test piece and weigh it, and the experiment will end at this point, which cannot Obtain the corrosion process of the test piece during the whole experiment period; and the weight loss method is limited by the accuracy of the weighing device, and it must be in the case of a long test period to obtain more accurate results, which cannot characterize the evolution process of erosion corrosion

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