Electrochemical in-situ measurement electrolytic cell device

Abstract

The invention relates to an electrolytic cell device of electrochemistry electrochemistry for performing corrosion fatigue crack propagation experiment on metal materials, belonging to the technical field of material corrosion research, mainly comprising a front trough solid, a rear trough solid, a three point bending specimen, a bolt, a water outlet, a water inlet, an auxiliary electrode, a salt bridge, a reference electrode and a conical flask; the front trough solid and the rear trough solid are symmetrical halfbody structures, which fix the electrolytic cell in a box shaped structure on two sides of the three point bending specimen through a thru bolt. A groove placing auxiliary electrode is arranged at the center of the front plate inner side of the front trough solid. One end of the salt bridge communicates with the auxiliary electrode and the work electrode through etching solution, and the other end is connected with the reference electrode through the conical flask full of saturated potassium chloride solution. A left posterior lateral plate and a right posterior lateral plate have the same height and the same width with a left front lateral plate and a right front lateral plate, which is a symmetrical shape and structure, having simple and practical structure, multiple measurable functions, long service life, high measuring precision and good accuracy.

Description

Technical field: [0001] The invention belongs to the technical field of material corrosion research and relates to an electrolytic cell device capable of performing electrochemical in-situ measurement for corrosion fatigue crack growth tests on various metal materials. Background technique: [0002] Corrosion fatigue refers to the fracture phenomenon of metal materials caused by the synergistic effect of corrosive medium and alternating stress or pulsating stress. In engineering practice, various structures subjected to cyclic loads may be damaged by corrosion fatigue, causing major accidents and bringing heavy losses to the national economy. The development of modern industry requires components to withstand more severe corrosion and load conditions, which makes the problem of corrosion fatigue more serious. In corrosion fatigue damage, its life is mainly controlled by crack propagation behavior, so it is of great significance to study the crack growth law and its influenc...

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Problems solved by technology

The existing corrosion fatigue technology and its corrosion devices are designed for fatigue samples, but the corrosion fatigue crack growth samples cannot be electrochemically measured using the same corrosion device

At present, there are few reports on electrochemical in-situ measurement techniques for corrosion fatigue crack growth of metal materials, only a brief introduction to corrosion test design in corrosion fatigue tests, such as: Aviation Industry Standard HB 6626-92 "Metal Materials in Aqueous Media Medium Fatigue Crack Growth Rate Test Method" has a schematic diagram of the cyclic corrosion tank and electrochemical measurement connection for the standard compact tensile C(T) specimen, but it is not applicable to the three-point bending specimen

Therefore, there are common shortcomings in the prior art that it is difficult to perform electrochemical measurements on corrosion fatigue crack growth samples, especially the lack of devices for electrochemical in-situ measurements.

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