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Method for quantitatively evaluating corrosion area

A quantitative evaluation and area technology, applied in measuring devices, instruments, image data processing, etc., can solve problems such as accurate evaluation of corrosion errors and evaluation errors

Pending Publication Date: 2020-10-30
TANGSHAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires technicians to be very familiar with the map and have rich experience, but there may still be some errors in the evaluation; in the industry, the galvanized sheet is passivated and subjected to salt spray for a long time, and sometimes it is necessary to evaluate the white rust corrosion area. At present, only technicians Evaluate the corrosion area based on experience or other experiences; in the industry, electrophoretic plates generally evaluate the corrosion width after scratching and corrosion of the sample, and the corrosion width is directly evaluated for the corrosion width, and after the paint film near the electrophoretic plate is scratched is removed. For the evaluation of the corrosion width, there are also some standards that conduct a comprehensive evaluation of the corrosion width in sections. This evaluation method is more scientific, but the evaluation of the width of each section is still the maximum width, and there is still a certain error in the accurate evaluation of the corrosion.

Method used

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  • Method for quantitatively evaluating corrosion area
  • Method for quantitatively evaluating corrosion area
  • Method for quantitatively evaluating corrosion area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Open Adobe Photoshop CS6, press Ctrl+N to create a new canvas, and Ctrl+O to open the corrosion photo to be processed. Such as figure 1 shown.

[0040] 2. Select the "Magic Wand Tool", click on the corrosion photo, select the target corrosion representative area, and then right-click to "Select Similar". Such as figure 2 shown.

[0041] 3. Find "Image"-"Analysis"-"Record Measurement" in the menu bar, and you can find the phosphating area S1 at the bottom of the software.

[0042] 4.Ctrl+Shift+I, reverse selection to get the non-phosphorylated area. Such as image 3 shown.

[0043] 5. Find "Image"-"Analysis"-"Record Measurement" in the menu bar, and you can find the non-phosphate area S2 at the bottom of the software.

[0044] 6. Area ratio of phosphating area = S1 / ( S1+ S2)

Embodiment 2

[0046] 1. Open Adobe Photoshop CS6, press Ctrl+N to create a new canvas, and Ctrl+O to open the corroded photo to be processed. Such as Figure 4 shown.

[0047] 2. Select the "Magic Wand Tool", click on the corrosion photo, select the target corrosion representative area, and then right-click and "Select Similar". Such as Figure 5 shown.

[0048] 3. Find "Image"-"Analysis"-"Record Measurement" in the menu bar, and you can find the phosphating area S1 at the bottom of the software.

[0049] 4. Ctrl+Shift+I, reverse selection to get the non-phosphorylated area. Such as Image 6 shown.

[0050] 5. Find "Image"-"Analysis"-"Record Measurement" in the menu bar, and you can find the non-phosphate area S2 at the bottom of the software.

[0051] 6. Area ratio of phosphating area = S1 / ( S1+ S2)

Embodiment 3

[0053] 1. Open Adobe Photoshop CS6, press Ctrl+N to create a new canvas, and Ctrl+O to open the corrosion photo to be processed. Such as Figure 7 shown.

[0054] 2. Select the "Magic Wand Tool", click on the corrosion photo, select the target corrosion representative area, and then right-click to "Select Similar". Such as Figure 8 shown.

[0055] 3. Find "Image"-"Analysis"-"Record Measurement" in the menu bar, and you can find the phosphating area S1 at the bottom of the software.

[0056] 4.Ctrl+Shift+I, reverse selection to get the non-phosphorylated area. Such as Figure 9 shown.

[0057] 5. Find "Image"-"Analysis"-"Record Measurement" in the menu bar, and you can find the non-phosphate area S2 at the bottom of the software.

[0058] 6. Area ratio of phosphating area = S1 / ( S1+ S2)

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Abstract

The invention relates to a method for quantitatively evaluating a corrosion area, and belongs to the technical field of corrosion measurement and evaluation. According to the technical scheme, Adobe Photoshop CS6 is used, a magic wand tool is applied, a target corrosion area is clicked on a corrosion picture, then similarity is selected, recording and measurement are carried out, and the corrosionarea S1 can be obtained. And through reverse selection, recording and measuring again to obtain the area S2 of the non-target corrosion area, wherein the area ratio of the target corrosion area is equal to S1 / (S1 + S2). The method disclosed by the invention has the beneficial effects of no need of ruler measurement, benchmarking, no influence of human factors, small error, simple and easy operation, short time consumption, high efficiency, low dependence on pixels, and easiness in distinguishing corroded areas of various salt spray tests.

Description

technical field [0001] The invention relates to a method for quantitatively evaluating the corrosion area, belonging to the technical field of corrosion measurement and evaluation. Background technique [0002] Cold-rolled sheets, galvanized sheets, aluminum-coated sheets and their bare sheets produced by steel mills are subject to different forms of corrosion or coating corrosion inspections before they are sold to customers and during their use. At present, there are many evaluations of the degree of corrosion, for example: "GBT6461-2005 Rating of samples and test pieces of metal and other inorganic coatings on metal substrates after corrosion tests", the evaluation method is to compare the existing dots or photos in the national standard , according to the existing evaluation level to rate the target. This requires technicians to be very familiar with the map and have rich experience, but there may still be some errors in the evaluation; in the industry, the galvanized s...

Claims

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Application Information

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IPC IPC(8): G06T7/62G01N21/88
CPCG06T7/62G01N21/8851G01N2021/8887
Inventor 孟凡月夏明生李涛
Owner TANGSHAN IRON & STEEL GROUP
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