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Method for preventing corrosion of low-temperature fracture

A low-temperature, fracture technology, applied in the direction of using a single impact force to test the strength of materials, measuring devices, instruments, etc., can solve the problems of misjudgment and difficult fracture analysis of SEM, and achieve the effect of simple method and convenient acquisition.

Pending Publication Date: 2021-11-19
BAOTOU IRON & STEEL GRP
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preventing low-temperature fracture corrosion, which can prevent the low-temperature fracture from rusting due to the water vapor in the air frosting on the specimen fracture, and solve the problem that fracture corrosion easily brings difficulties and problems to subsequent scanning electron microscope fracture analysis. miscarriage of justice

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  • Method for preventing corrosion of low-temperature fracture
  • Method for preventing corrosion of low-temperature fracture
  • Method for preventing corrosion of low-temperature fracture

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Embodiment Construction

[0020] Select a group of three low-temperature impact samples, numbered 1#, 2#, and 3#, prepare a 500ml clean plastic beaker, and pour 100ml of absolute ethanol into the beaker. The -40°C low temperature impact test was carried out on 1#, 2#, and 3# samples in turn. 1# sample impact test is interrupted without any treatment, 2# sample impact test is interrupted for 1 minute and then put into the beaker, 3# sample impact test is interrupted and immediately put into the beaker; 1# and 2# Due to the low temperature on the surface of the sample, frost formed rapidly on the surface of the sample, see figure 1 ; Put the 2# sample after frosting into the beaker; after a few minutes, observe the 1# sample, there are water droplets on the outer surface of the sample, and a layer of water film can be seen on the fracture surface, see image 3 ; Place the 2# and 3# samples in the beaker for 3-5 minutes and then take them out. Due to the strong volatilization of absolute ethanol, the fra...

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Abstract

The invention discloses a method for preventing corrosion of a low-temperature fracture, which adopts common reagents absolute ethyl alcohol and a plastic beaker in a laboratory, is simple, convenient to obtain raw materials and reusable, does not need a laboratory power supply, an electric hair dryer and the like, does not need additional investment, and can be applied to protection of low-temperature impact fractures of various metal materials. The method is suitable for fracture protection of various low-temperature test samples, and a novel fracture protection method is provided for personnel engaged in experiments and research and development in the aspects of low-temperature experiments and tests.

Description

technical field [0001] The invention relates to a method for preventing low-temperature fracture corrosion. Background technique [0002] The low temperature impact test is an important index to test the service performance of metal materials under low temperature conditions. Due to the different low-temperature brittleness characteristics of metal materials, researchers need to conduct further scanning electron microscope inspection and analysis of low-temperature impact fractures to determine the mechanism and cause of low-temperature failure. When conducting scanning electron microscope fracture analysis, it is found that low-temperature fractures are very prone to fracture corrosion. The reason is that low-temperature metals tend to condense water vapor in the air on the surface of the metal sample, which is the so-called frosting on the metal surface. If the frosted fracture is not dried in time or protective measures are taken, local corrosion will form on the fracture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2202G01N3/30G01N23/2251
CPCG01N23/2202G01N3/30G01N23/2251
Inventor 李智丽
Owner BAOTOU IRON & STEEL GRP
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