Testing system for scouring corrosion of bending pipe and testing method

Abstract

The invention discloses a testing system for the scouring corrosion of a bending pipe and a testing method. The testing system comprises a water tank, wherein an outlet of the water tank is connected with a centrifugal pump by a pipeline, and a ball valve is arranged on the pipeline between the water tank and the centrifugal pump; the output end of the centrifugal pump is connected with one end of the bending pipe to be tested by a straight pipeline, and the other end of the bending pipe to be tested is connected into an inlet of the water tank by a pipeline; a flow meter is arranged on a connecting pipeline between the bending pipe to be tested and the water tank; the inner wall of the bending pipe to be tested is provided with a plurality of grooves at different positions along the circumferential direction and the axial direction; the bottom parts of the grooves are provided with line holes for educing testing guide lines; the wall of the bending pipe to be tested is provided with two round holes which are respectively provided with an auxiliary electrode and a reference electrode. The testing system and the testing method disclosed by the invention have the advantages that the inner wall of the bending pipe to be tested is provided with the plurality of grooves and piece hanging can be carried out on different small areas of the bending pipe to be tested, so that the synchronous conduction of weight-loss test and electrochemical test for the scouring corrosion of the bending pipe to be tested is realized.

Description

technical field [0001] The invention relates to the field of erosion and corrosion experiment devices, in particular to an elbow erosion and corrosion testing system and a testing method, which are used in a laboratory to simulate the erosion and corrosion behavior of a metal elbow in a corrosive environment under certain conditions. Background technique [0002] At present, there are three kinds of experimental devices widely used in the study of pipeline erosion corrosion: rotary experimental device, jet experimental device, and pipe flow experimental device. The common point of the experimental devices is to create a relative movement between the medium and the sample, so that the fluid can cause erosion and corrosion to the pipeline. However, the rotating experimental device has high requirements on the stability of the motor and the verticality of the rotating shaft, and the eddy current caused by the rotation is greatly affected, which cannot truly simulate the actual ...

AI Technical Summary

Problems solved by technology

However, the erosion corrosion of the elbow is a kind of local corrosion, which shows different corrosion characteristics in different parts of the elbow. Therefore, the existing experimental equipment cannot characterize the erosion corrosion characteristics of different local areas of the elbow, and the corrosion and erosion damage characteristics of small local areas. difference, showing great limitations in the study of elbow erosion corrosion

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