Solution chemistry automatic control device used in corrosion process of iron and alloy of iron and use method of solution chemistry automatic control device

Abstract

The invention provides a solution chemistry automatic control device used in the corrosion process of iron and alloy of iron and a use method of the solution chemistry automatic control device and belongs to the field of material corrosion and control. PH and the iron ion/ferrous ion concentration in the corrosion process of iron and alloy of iron can be automatically controlled. The device is composed of a pH control module and an iron ion/ferrous ion concentration control module and mainly comprises ion exchange resin, a flux-stabilized pump, a pH controller, a timing controller, a pH probe, an experimental sample and the like. According to the device, hydrogen ions generated through ion exchange are used for neutralizing hydroxyl ions generated in the corrosion process of iron and alloy of iron, the pH controller is used for controlling on/off of the flux-stabilized pump, and pH can be automatically controlled. Meanwhile, iron ions/ferrous ions generated in the corrosion process are absorbed through ion exchange, the real-time measuring result of the iron ion/ferrous ion concentration serves as a reference, the on/off time ratio of the flux-stabilized pump is adjusted through the timing controller, and the iron ion/ferrous ion concentration can be automatically controlled.

Description

technical field [0001] The invention relates to the field of material corrosion and control, and can be popularized and applied to corrosion process monitoring, corrosion process indoor simulation, corrosion product film growth process control and the like. Background technique [0002] Corrosion of iron and iron alloys is a common phenomenon in production and life. The main anodic reaction for the corrosion of iron and ferrous alloys is the dissolution of iron, which forms ferric ions and / or ferrous ions after dissolution, resulting in an increase in the concentration of ferric ions and / or ferrous ions in the solution; the main cathodic reaction is oxygen reduction and Reduction of hydrogen ions, both reactions cause the pH of the solution to rise. [0003] The concentration of iron ions and ferrous ions, as well as pH are the key factors affecting the formation of corrosion product film, and the corrosion product film determines the change trend of corrosion rate of iron ...

AI Technical Summary

Problems solved by technology

This creates a significant discrepancy between laboratory simulation results and field corrosion data

In particular, the corrosion model based on experimental data does not match the corrosion behavior in the field

[0005] Therefore, in order to better simulate the in-situ corrosion behavior, the current solution is to use large-scale loop test devices. However, these devices are not only expensive to operate, but also have low experimental efficiency. Therefore, it is necessary to invent an economical and controllable corrosion process The small experimental device for the pH of the medium solution and the concentration of ferric ions / ferrous ions has important practical significance

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