Apparatus and method for researching erosion sensibility of stress in air under the condition of dynamic load
A stress corrosion and sensitive technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve problems such as hydrogen permeation current measurement, and achieve the effect of low cost, simple operation and high precision
Inactive Publication Date: 2009-07-08
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology
[0005] In order to overcome the deficiencies in the research on the sensitivity of stress corrosion cracking in the atmospheric environment under dynamic load conditions under the existing conditions, the object of the present invention is to provide a device and method for studying the sensitivity of stress corrosion cracking of metals in the atmosphere under dynamic load conditions, Solve problems such as hydrogen permeation current measurement under dynamic load conditions
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[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0032] The present invention comprises an electrolytic cell, a liquid reservoir 10, a sample 15 as a working electrode, a nickel wire 14 fixed inside the sample 15, the sample 15 passes through the electrolytic cell and the working section is inside the electrolytic cell, and the sample 15 is used as a working electrode. Electrode, nickel wire 14 is used as reference electrode and auxiliary electrode at the same time, sample 15 and nickel wire 14 form a set of three-electrode system, and lead wires are respectively drawn out to connect with the port of the data collector.
[0033] like Figure 1 ~ Figure 3 As shown, the electrolytic cell comprises a loam cake 1, an outer cylindrical side wall 5, an inner cylindrical side wall 7 and a bottom plate 2, a liquid storage tank 10 is formed between the inner and outer cylindrical side walls, and the inner cylindrica...
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Abstract
The invention relates to a device and a method for studying the sensitivity of metal stress corrosion cracking, in particular to a device and a method for studying the stress corrosion cracking sensitivity of metal materials in the atmospheric environment under dynamic load conditions. Osmotic current measurement, etc. The device includes an electrolytic cell, a liquid reservoir, a sample, and a nickel wire fixed inside the sample, the sample passes through the electrolytic cell and the working section is placed inside the electrolytic cell. Insert the sample with nickel wire inside into the electrolytic cell, keep the working section of the sample inside the electrolytic cell, the electrolytic cell is used as the cathode cell, the inside of the sample is used as the anode cell, pour the experimental medium into the liquid storage tank, and It was introduced to the surface of the working section of the sample by the wick method, and the two ends of the sample were connected to a slow strain rate tensile machine, and the sample was stretched and measured. The invention is suitable for measuring the hydrogen permeation current, and can truly simulate the dry-wet cycle conditions in the atmospheric corrosion in the actual situation, and can truly reflect the environmental sensitivity of the stressed sample in the atmosphere.
Description
technical field [0001] The invention relates to a device and a method for studying the sensitivity of metal stress corrosion cracking, in particular to a device and a method for studying the sensitivity of stress corrosion cracking of metal materials in an atmospheric environment under dynamic load conditions. Background technique [0002] Hydrogen evolution reaction will occur during the metal corrosion process, and hydrogen will have a serious impact after entering the lattice of sensitive materials and cause embrittlement of sensitive materials, embrittlement will lead to the formation of cracks in sensitive materials and accelerate the expansion, affecting the structure of sensitive materials Safety. Moreover, it has been proved by experiments that the essence of atmospheric corrosion is the electrochemical corrosion of metals under the electrolyte film, and the dry-wet cycle can accelerate atmospheric corrosion and hydrogen permeation of steel. Hydrogen permeation beha...
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IPC IPC(8): G01N17/02
Inventor 郑传波黄彦良朱永艳于青
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI