Method for characterizing material corrosion resistance in high-throughput manner by using micro-channel electrochemical system

Abstract

The present invention discloses a method for characterizing the material corrosion resistance in a high-throughput manner by using a micro-channel electrochemical system. The method is characterized in that: a plurality of to-be-measured samples are uniformly arranged in the micro-area mounting mold to be solidified into an integrated electrode, scanning Kelvin probes are used to measure the Kelvin potential of each sample, and high-throughput in-situ non-destructive detection is performed to achieve rapid screening of corrosion resistance of different material samples, so that the problem ofgalvanic corrosion caused by the difference of composition of the tow electrode during the screening process is effectively avoided, and the accuracy and efficiency of the screening result are improved, wherein the accuracy of the sample coupling test is greatly improved from 37.5% of the individual test to 75%. The method provided by the present invention has the following advantages that: 1, byperforming high-throughput parallel testing, the test time is greatly reduced; 2, the human error in the debugging process is reduced and the accuracy of the test result is improved; and 3, the galvanic corrosion problem of the tow electrode method is avoided, and the system error is effectively reduced. The method provided by the present invention has significant application value for screening of material corrosion resistance.

Description

technical field [0001] The invention relates to a method for detecting the corrosion resistance of metal materials, in particular to a method for characterizing the corrosion resistance of metal materials with high throughput, which is applied in the technical field of corrosion electrochemistry. Background technique [0002] Corrosion resistance characterization is an important stage for materials from research and development to actual service. The existing traditional corrosion characterization technology research objects are a single sample and a single solution system. The test process takes a long time, such as polarization-several hours, salt spray experiment-digital Days, natural erosion - several years, etc. However, traditional electrochemical analysis methods are time-consuming, have poor spatial resolution and cause great damage to materials, and cannot meet the ever-changing needs of new material development and characterization. [0003] At present, the high-th...

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Problems solved by technology

Wire beam electrode technology has been widely used in high-throughput corrosion resistance screening, but since the size of a single wire beam electrode is generally several millimeters (1-3 mm), the preparation of wire beam electrodes is cumbersome and the measurement accuracy is also on the order of millimeters. , the tow electrode test is generally in the solution system, and the test results cannot effectively avoid problems such as galvanic corrosion, which leads to large errors in the screening results

[0004] The micro-area electrochemical scanning Kelvin probe (SKP) module is widely used in the screening of corrosion resistance due to its high test accuracy and non-destructive testing. However, the traditional micro-area electrochemical SKP measurement is mostly a single sample, multiple samples The comparison of corrosion resistance requires multiple measurements. Since the distance between the probe and the surface of the sample is not fixed in each measurement, there is a large human error, which reduces the accuracy of the corrosion resistance screening results.

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