Indoor experimental simulation device for causing corrosion of metallic materials by direct-current stray current

Abstract

The invention discloses an indoor experimental simulation device for causing corrosion of metallic materials by a direct-current stray current, and belongs to the technical field of metallic materialcorrosion testing. The device comprises a numerical controlled socket, a grounding wire, a box body, a temperature control system, a humidity control system, a corrosion experimental system and an electrochemical testing system, the temperature control system and the humidity control system are fixed on the box body, the corrosion experimental system and the electrochemical testing system are located in the box body, the socket is located on the box body, and the grounding wire is arranged at the bottom of the box body. By means of the indoor experimental simulation device, simulation experiments in which corrosion is generated by the metallic materials under the influences of a stray current under laboratory conditions can be achieved while the corrosion process can be monitored through the electrochemical testing system; the experiments can be conducted under constant-temperature and constant-humidity conditions due to controllable environmental temperature and humidity. In addition,the structure of the device is simple, sample placing and taking are easy, and the production cost is low.

Description

technical field [0001] The invention relates to an indoor experimental simulation device for metal material corrosion caused by DC stray current, belonging to the technical field of metal material corrosion testing. Background technique [0002] Stray current refers to the current flowing into other places due to the leakage of the original normal circuit, which mainly comes from electrified railways, high-voltage transmission lines, cathodic protection systems, etc. The corrosion of metal by stray current corrosion is electrochemical corrosion, and its destructive feature is localized corrosion in the anode area. The principle is the same as the natural corrosion of metals, and both have anodic oxidation process and cathodic reduction process. The area where the current flows out is the anode area, and the area where the current flows in is the cathode area. [0003] Buried pipelines have been in the underground soil environment for a long time, and are corroded by stray c...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a new type of indoor simulation experiment device for the corrosion of metal materials caused by DC stray currents, so as to solve the key technical problems of existing devices without temperature and humidity control systems, corrosion monitoring systems and in-situ detection.

Images