Corrosion rate measuring device and method based on slide rheostat

Abstract

The invention relates to a corrosion rate measuring device based on a slide rheostat and a measuring method.The corrosion rate measuring device comprises the slide rheostat and a current measuring device, the slide rheostat comprises an insulating shell and a resistor, the resistor is in sliding fit with a metal plate which is vertically and electrically connected, and a spring is arranged at the bottom of a second insulating layer of the metal plate; a series circuit is arranged among the current measuring device, the resistor and the metal plate, and the position of the metal plate, the access resistance and the current are changed through the mass change of the test piece in the corrosion process of the test piece; the mass change of the test piece is calculated by calculating the resistance change through the current, and the change distance of the slide rheostat is equal to the deformation quantity of the spring, so that the corresponding real-time corrosion rate under the test time is calculated and obtained, and the defects of data discretization, low experiment efficiency and large workload caused by discontinuous weighing in the existing process are overcome; the device can visually display the whole corrosion process of the test piece in real time, and can be used for detecting the corrosion resistance of a material, selecting a corrosion inhibitor, detecting the anti-corrosion effect when process conditions are changed, and the like.

Description

technical field [0001] The invention belongs to the field of corrosion rate measurement, and in particular relates to a corrosion rate measurement device and a measurement method based on a sliding rheostat. Background technique [0002] Corrosion refers to the process of loss and destruction of metals and non-metals under the action of surrounding media including water, air, acid, alkali, salt, solvent, etc. Metal corrosion refers to the chemical or electrochemical action of the surrounding media. And it is often the destruction of metal under the combined action of physical, mechanical or biological factors. Metal rust is the most common form of corrosion. During corrosion, a chemical or electrochemical multiphase reaction occurs on the interface of the metal, which turns the metal into an oxidized (ion) state, which will significantly reduce the mechanical properties of the metal material such as strength, plasticity, and toughness, and destroy the geometry of the metal c...

AI Technical Summary

Problems solved by technology

[0004] In view of the above technical problems, the present invention provides a corrosion rate measurement device and measurement method based on a sliding rheostat. Real-time corrosion rate measurement is performed based on a sliding rheostat, which solves the problem of discrete data and low experimental efficiency caused by discontinuous weighing in the existing process. Defects with a large workload can display the whole process of specimen corrosion in real time and intuitively, which can be used to detect the corrosion resistance of materials, select corrosion inhibitors, and detect anti-corrosion effects when changing process conditions, etc.

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