Positioning tracking characterization method for corrosion research
A positioning tracking and corrosion research technology, applied in the field of high-throughput positioning tracking characterization, can solve the problems of in-situ testing limited by the simulated corrosion environment, many samples, and long time consumption
Pending Publication Date: 2020-12-25
GUOBIAO BEIJING TESTING & CERTIFICATION CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, such as the traditional method uses many samples, takes a long time, and the in-situ test is limited by the simulated corrosion environment, and proposes a positioning tracking characterization technology similar to in-situ testing, which can continuously observe materials The evolution law of the microstructure of the corrosion process in different corrosion stages, obtain the time series data of the corrosion morphology and products on the surface of the material, and analyze the corrosion mechanism of the material
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[0026] The present invention firstly prepares metal material experimental samples for corrosion research, and then utilizes a micro-Vickers hardness tester to make positioning indentations on the sample surface as marks for positioning tracking observation; scanning electron microscopy (SEM), electronic Scattering diffraction (EBSD) and energy spectrum analysis (EDS) tests to obtain the uncorroded surface morphology, microstructure information and element composition information of the sample positioning area; simulate the corrosion environment to corrode the sample; regularly take out the sample for SEM Test to obtain the time-series data of the surface corrosion morphology and products of the sample; use the image processing software to use the positioning indentation as the anchor point, overlay the EBSD test results on the SEM morphology photo, and combine the morphology and composition information to conduct SEM Joint analysis of +EDS+EBSD.
[0027] The specific steps of ...
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The invention relates to a positioning tracking characterization method for corrosion research, and belongs to the field of research of material corrosion. The method comprises the following steps of:punching a hardness indentation on the surface of a sample by using a micro Vickers hardness tester as a mark for positioning tracking observation, recording the position of the indentation on the surface of the sample, and testing the appearance, components and microstructure of the sample which is not corroded in a positioning area; repeating the process of taking out and testing after corrosion to obtain the corrosion appearance of the surface of the material and time sequence data of a product; and realizing positioning tracking analysis of the microstructure by using image processing software and taking the indentation as an anchor point. According to the method, corrosion characteristics of different stages can be obtained only by observing one sample, the effect of approximate in-situ test can be achieved without using a special in-situ test instrument, the corrosion environment can be any environment, the evolution process of the microstructure of the material in different corrosion stages can be continuously observed, and the corrosion analysis is expanded from the whole material to the microscopic level.
Description
technical field [0001] The invention relates to a positioning tracking characterization method for corrosion research, in particular to a high-throughput positioning tracking characterization technique and its application in corrosion research, which belongs to the research field of material corrosion. Background technique [0002] For the research of metal materials in the field of corrosion, it is usually used to prepare multiple control samples, which are corroded under different environmental conditions or corroded for different times, and the materials are analyzed by measuring the corrosion weight loss, observing the corrosion morphology and corrosion products, etc. Corrosion mechanism, and finally draw conclusions. This traditional method uses many samples and takes a long time for the experiment. [0003] In-situ testing can track and study the transformation law and mechanism of the material microstructure. However, in order to achieve in-situ testing, special and...
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Login to View More IPC IPC(8): G01N17/00G01N23/2202G01N23/2251G01N23/203G01N23/2005G01N23/20091
CPCG01N17/006G01N23/2202G01N23/2251G01N23/203G01N23/2005G01N23/20091
Inventor 谭振江马通达
Owner GUOBIAO BEIJING TESTING & CERTIFICATION CO LTD