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Method for measuring volume, area and depth of etching pits simultaneously

A technology of corrosion pits and volumes, applied in the direction of measuring devices, instruments, optical devices, etc., to achieve the effect of solving difficult measurements

Active Publication Date: 2014-07-23
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the volume, area, and depth of corrosion pits. The laser confocal microscope is used to measure the volume, area, and depth of corrosion pits, which solves the current technical problems in the measurement of corrosion pits and realizes the simultaneous measurement of corrosion pits. Pit volume, area and depth provide a more accurate evaluation method for the study of corrosion characteristics of iron and steel materials, and lay a foundation for quantitative analysis of corrosion of metal materials

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  • Method for measuring volume, area and depth of etching pits simultaneously
  • Method for measuring volume, area and depth of etching pits simultaneously

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The measurement of embodiment 1 single corrosion pit

[0029] In order to study the corrosion resistance of X80 pipeline steel, a 30 (length) × 30 (width) mm, 5 mm thick X80 pipeline steel plate was selected for simulated corrosion experiments. Corrosion test parameters: Corrosion for 7 days under constant temperature (45°C) and constant humidity (humidity 90%) conditions.

[0030] 1. Because the corrosion sample fully meets the requirements of the test sample, this embodiment does not include the sample cutting step. The corroded samples were corroded with a 1:1 volume hydrochloric acid aqueous solution until the oxidation products were completely removed, then ultrasonically cleaned with alcohol for 3 minutes, and dried with a hair dryer.

[0031] 2. Turn on the laser confocal microscope and the control computer, start the LEXT OLS control software, complete the system initialization, then place the sample to be observed on the stage, select the area to be observed u...

Embodiment 2

[0035] The measurement of all corrosion pits in the field of view of embodiment 2

[0036] The same sample as in Example 1 was used to study the measurement method of all corrosion pits in the same field of view. The specific test process is as follows:

[0037] 1. The sample preparation process is the same as above.

[0038] 2. Turn on the laser confocal microscope and the control computer, start the LEXT OLS special control software, complete the system initialization, then place the sample to be observed on the stage, select the area to be observed under the 5x objective lens, and after the area is selected, set the objective lens The magnification is gradually increased, which is 10 times, 20 times, and 50 times in turn. Each time the magnification is changed, the focus needs to be adjusted to enable clearer imaging under ordinary light sources. Here, according to the size of the corrosion pit, it is decided to use a 50x objective lens for observation. Turn on the laser...

Embodiment 3

[0041] The influence of embodiment 3 scanning steps on measurement results

[0042] Using the same sample as in Example 2, and the same field of view under the same magnification, the influence of the change of the scan step length on the measurement results was studied. The specific test process is as follows:

[0043] 1. The sample preparation process is the same as above.

[0044] 2. Turn on the laser confocal microscope and the control computer, start the LEXT OLS special control software, complete the system initialization, then place the sample to be observed on the stage, select the area to be observed under the 5x objective lens, and after the area is selected, set the objective lens The magnification is gradually increased, which is 10 times, 20 times, and 50 times in turn. Each time the magnification is changed, the focus needs to be adjusted to enable clearer imaging under ordinary light sources. Here, according to the size of the corrosion pit, it is decided to u...

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Abstract

The invention discloses a method for measuring the volume, area and depth of etching pits simultaneously and belongs to the technical field of etching measurement and evaluation. A laser confocal microscopy is adopted to for measurement. The process step is to adopt the laser confocal microscopy. The measurement method comprises the following steps of: capturing samples, removing superficial oxidation products, micrographing and measuring data. The method has the advantages that the volume, area and depth of the etching pits are measured simultaneously by laser confocal micrograph of three-dimensional images. The three-dimensional images of the etching pits can be provided so as to visually observe the size and feature of the etching pits. In addition, the volume, area and depth of the etching pits can be measured simultaneously and the present technical problem that the etching pits are difficult to measure is resolved.

Description

technical field [0001] The invention belongs to the technical field of corrosion measurement and evaluation, and provides a method for simultaneously measuring the volume, area, and depth of corrosion pits. A laser confocal microscope is used to measure the volume, area, and depth of corrosion pits to realize simultaneous measurement of the volume, area, and depth of corrosion pits. It lays the detection foundation for the quantitative analysis of material corrosion. Background technique [0002] With the upgrading of steel products and the in-depth development of research, people pay more and more attention to the corrosion resistance properties, especially the corrosion resistance steels for ships and pipeline steels need to study their corrosion resistance properties. In the process of corrosion research, in addition to selecting appropriate test conditions and methods for corrosion experiments on materials, the key is to accurately measure corrosion pits, so as to qualit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01B11/28G01B11/22G01B11/24
Inventor 蔡宁鞠新华温娟
Owner SHOUGANG CORPORATION
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