Multi-parameter adjustable electrolytic cell device for loading process

Abstract

The invention belongs to the technical field of corrosion and relating to a multi-parameter adjustable electrolytic cell device for a loading process. A test sample is vertically arranged in a cylindrical heat-insulation solution groove and the upper end of the test sample is communicated with a potentiostat; the test sample passes through the center of the bottom of the heat-insulation solution groove; an auxiliary electrode which is communicated with the potentiostat is arranged at one side of the upper middle part of the inner cavity of the heat-insulation solution groove; a heat-insulation rubber pipe which is communicated with a solution preparation groove is arranged at one side of the upper part of the heat-insulation solution groove; one side of the lower part of an anti-leaking device is communicated with an etchant solution pipeline through a mini-type water pump; the lower end of a reference electrode is inserted into the vertical port of a Luggin capillary and the upper end of the reference electrode is electrically communicated with the potentiostat; and the horizontal flat section of the Luggin capillary passes through the side wall of the heat-insulation solution groove so as to be communicated with the test sample in a connection manner. The multi-parameter adjustable electrolytic cell device for the loading process has the advantages of simple overall structure, reliable design principle, good use safety, strong automatic adjustment effect, good controllable measurement performance and less environmental pollution.

Description

Technical field: [0001] The invention belongs to the technical field of corrosion, and relates to an electrolytic cell device for in-situ electrochemical measurement of the tension and fatigue of metal materials in a special and complex solution system, in particular to a multi-parameter controllable device for the loading process Electrolytic cell device. Background technique: [0002] Stress corrosion or corrosion fatigue will occur when metal materials are subjected to stress or alternating stress in a corrosive environment. Any component subjected to stress or alternating stress in marine structural engineering may suffer from stress corrosion or corrosion fatigue damage, especially by the cathode Protected metal materials or components are more sensitive to stress corrosion or corrosion fatigue. These corrosion damages will bring significant economic losses to the national economy. It is particularly urgent to study the corrosion behavior of metal materials and componen...

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Problems solved by technology

Some people in China have also invented corrosion devices that can be used in conjunction with fatigue or stretching machines to control the temperature and concentration of corrosive media; for example, the invention patent with application number 200810146899.2 "A device for temperature and humidity control in the process of corrosion fatigue "By sealing the corrosion section of the sample in a corrosion box with a suitable size and good sealing performance and leaving a medium circulation inlet and outlet, and then fixing the sample on a stretching machine or a fatigue machine, it is possible to use the medium while fatigue or stretching. The circulating flow realizes the constant temperature and medium concentration of the metal material corrosion part, which makes it possible for the laboratory to simulate the corrosion fatigue and stress corrosion tests in various corrosive atmospheres when the metal components are loaded; the application number is 200810012951. The equipment and its application to realize synchronous dry-wet alternating accelerated corrosion in the process" solves the performance evaluation of metal components when the sample is subjected to stress and dry-wet alternately, and is in a certain humidity and temperature range, that is, the load and atmospheric corrosion act on the environment at the same time The performance test evaluation method of the lower metal components; however, the devices mentioned in the above two patents are not suitable for stress corrosion and corrosion fatigue tests in water media; the invention patent with application number 200810049624.7 "a kind of corrosion fatigue test for metal materials The seawater circulation system for the test” can realize the low-cycle corrosion fatigue test in circulating seawater and solve the circulation problem of the water medium in the corrosion fatigue test, but it is only limited to the cantilever bending specimen; the invention patent with the application number 200810167021.7 “a Fatigue crack growth rate test environment device in corrosive environment", which can realize the crack growth test of C(T) specimens in water medium, and solve the problem of strain gauge corrosion in water medium, but it is only limited to C(T) specimens a sample

The invention patent with the application number 200810249619.0 "An electrolytic cell device for electrochemical in-situ measurement" solves the problem of strain gauge corrosion and electrochemical measurement in the fatigue crack growth rate test of three-point bending specimens, but it is limited to three points bending specimen

To sum up, in the process of corrosion fatigue and stress corrosion, there is currently no device that can solve the multi-parameter control of water medium circulation and corrosion solution salinity, temperature, dissolved oxygen content, pH value and sample polarization potential. It can also realize the in-situ electrochemical measurement of the sample. In order to evaluate the corrosion fatigue and stress corrosion performance of metal materials and components in the complex and changeable solution system, the salinity, temperature and dissolved oxygen content of the corrosion solution can be realized during the loading process. It is very urgent to develop a multi-parameter controllable corrosion tank and electrolytic cell device, such as pH value and polarization potential of the sample.

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