CN111862188A - Method for quantitatively evaluating rusty area - Google Patents
Method for quantitatively evaluating rusty area Download PDFInfo
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- CN111862188A CN111862188A CN202010560299.1A CN202010560299A CN111862188A CN 111862188 A CN111862188 A CN 111862188A CN 202010560299 A CN202010560299 A CN 202010560299A CN 111862188 A CN111862188 A CN 111862188A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims abstract description 53
- 230000007797 corrosion Effects 0.000 claims abstract description 53
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 6
- 150000003839 salts Chemical class 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000005530 etching Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
- G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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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. The technical scheme of the invention is as follows: and (3) clicking a target corrosion area on the corrosion picture by using Adobe Photoshop CS6 and applying a magic rod tool, selecting similar materials, and recording and measuring to obtain the corrosion area S1. By counter-selection, the measurement was again recorded to give a non-target rust area S2, target rust area ratio = S1/(S1+ S2). The invention has the beneficial effects that: the method has the advantages of no need of measuring with a ruler, no influence of human factors on a map, small error, simple and easy operation, short time consumption, high efficiency, low dependency on pixels and easy distinguishing of various areas after corrosion in salt spray tests.
Description
Technical Field
The invention relates to a method for quantitatively evaluating a corrosion area, and belongs to the technical field of corrosion measurement and evaluation.
Background
The corrosion detection in different forms or coating corrosion detection is carried out on cold-rolled plates, galvanized plates, aluminum-plated plates and bare plates thereof produced by a steel mill before the cold-rolled plates, the galvanized plates and the aluminum-plated plates are sold to customers and in the using process of the customers. Currently, the degree of rusting is evaluated more frequently, for example: the test samples and test pieces of GBT6461-2005 metal and other inorganic coatings on the metal substrate were rated by rating the standard according to the rating given to the existing dots or photographs in the standard national standard. This requires the skilled person to be familiar with the map and experience is rich, but there may still be some error in the evaluation; in the industry, the galvanized plate is passivated and then subjected to salt spray for a long time, sometimes the white rust corrosion area needs to be evaluated, and currently, only technicians evaluate the corrosion area according to experience or other experiences; in the industry, the electrophoresis plate is generally used for evaluating the corrosion width of a test sample after being scratched and corroded, the corrosion width is directly evaluated, the corrosion width is evaluated after a paint film near the scratch of the electrophoresis plate is removed, and the corrosion width is comprehensively evaluated in a sectional width mode according to some standards.
Disclosure of Invention
The invention aims to provide a method for quantitatively evaluating a corrosion area, which utilizes Adobe Photoshop CS6 to automatically and accurately distinguish a target corrosion area from a non-target corrosion area and directly calculate the non-target corrosion area of the target corrosion area without measuring with a ruler, calibrating a chart, being not influenced by human factors, having small error, simple, convenient and easy operation, short time consumption, high efficiency, low dependency on pixels and easy distinguishing of various corroded areas of salt spray tests, and effectively solves the problems in the background art.
The technical scheme of the invention is as follows: a method for quantitatively evaluating a rusty area comprises the following steps:
(1) opening Adobe Photoshop CS6, creating a new canvas with Ctrl + N, and opening a corrosion photo to be processed with Ctrl + O;
(2) selecting a magic rod tool, clicking on the corrosion picture, selecting a target corrosion representative area, and then clicking to select similarity;
(3) finding an 'image' -analysis '-record measurement' in the menu bar, namely finding a phosphorization area S1 below the software;
(4) ctrl + Shift + I, and obtaining a non-phosphorized area through reverse selection;
(5) finding an 'image' -analysis '-record measurement' in the menu bar, namely finding a non-phosphorized area S2 below the software;
(6) The phosphorized region area ratio = S1/(S1 + S2).
The invention has the beneficial effects that: the Adobe Photoshop CS6 is used for automatically and accurately distinguishing a target corrosion area from a non-target corrosion area, the non-target corrosion area of the target corrosion area is directly calculated, ruler measurement and a calibration chart are not needed, the influence of human factors is avoided, the error is small, the operation is simple, convenient and easy to learn, the consumed time is short, the efficiency is high, the pixel dependence is low, and the areas after corrosion of various salt spray tests are easy to distinguish.
Drawings
FIG. 1 is a photograph of an etching to be treated in example 1 of the present invention;
FIG. 2 is a diagram of a selected similar tarnish representative area in example 1 of the present invention;
FIG. 3 is a diagram of a non-phosphated region of example 1 of the present invention;
FIG. 4 is a photograph showing an etching to be processed in example 2 of the present invention;
FIG. 5 is a diagram of a representative area of similar rust selected in example 2 of the present invention;
FIG. 6 is a diagram of a non-phosphated region of example 2 of the present invention;
FIG. 7 is a photograph showing an etching to be processed in example 3 of the present invention;
FIG. 8 is a diagram of a representative area of similar rust selected in example 3 of the present invention;
FIG. 9 is a diagram of a non-phosphated region of example 3 of the present invention;
FIG. 10 is a photograph of an etching solution to be treated in example 4 of the present invention;
FIG. 11 is a diagram of a representative area of similar rust selected in example 4 of the present invention;
FIG. 12 is a diagram of a non-phosphated region of example 4 of the present invention;
FIG. 13 is a photograph of an etching solution to be treated in example 5 of the present invention;
FIG. 14 is a diagram of a representative area of similar rust selected in example 5 of the present invention;
FIG. 15 is a diagram of a non-phosphated region of example 5 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A method for quantitatively evaluating a rusty area comprises the following steps:
(1) opening Adobe Photoshop CS6, creating a new canvas with Ctrl + N, and opening a corrosion photo to be processed with Ctrl + O;
(2) selecting a magic rod tool, clicking on the corrosion picture, selecting a target corrosion representative area, and then clicking to select similarity;
(3) finding an 'image' -analysis '-record measurement' in the menu bar, namely finding a phosphorization area S1 below the software;
(4) Ctrl + Shift + I, and obtaining a non-phosphorized area through reverse selection;
(5) finding an 'image' -analysis '-record measurement' in the menu bar, namely finding a non-phosphorized area S2 below the software;
(6) the phosphorized region area ratio = S1/(S1 + S2).
And selecting corrosion photos obtained by different steel types in different test standards to verify the universality of the method for evaluating the corrosion photos obtained under various experimental conditions. Specific examples are as follows. Five examples are now counted in table 1:
TABLE 1 Corrosion area ratings obtained for different samples according to different test standards
Example 1:
1. adobe Photoshop CS6 is opened, the new canvas is built for Ctrl + N, Ctrl + O opens the corrosion photo to be processed. As shown in fig. 1.
2. Selecting a magic rod tool, clicking on the corrosion picture, selecting a target corrosion representative area, and then clicking right to select similar. As shown in fig. 2.
3. Finding "image" - "analyze" - "record measure" in the menu bar, the bonderized area S1 can be found under the software.
And 4.Ctrl + Shift + I, and carrying out reverse selection to obtain a non-phosphorized area. As shown in fig. 3.
5. Finding "image" - "analyze" - "record measure" in the menu bar, one can find the non-phosphatized area under the software S2.
6. Phosphated zone area ratio = S1/(S1 + S2)
Example 2:
1. adobe Photoshop CS6 is opened, the new canvas is built for Ctrl + N, Ctrl + O opens the corrosion photo to be processed. As shown in fig. 4.
2. Selecting a magic rod tool, clicking on the corrosion picture, selecting a target corrosion representative area, and then clicking right to select similar. As shown in fig. 5.
3. Finding "image" - "analyze" - "record measure" in the menu bar, the bonderized area S1 can be found under the software.
4.Ctrl + Shift + I, and reverse selecting to obtain a non-phosphorized area. As shown in fig. 6.
5. Finding "image" - "analyze" - "record measure" in the menu bar, one can find the non-phosphatized area under the software S2.
6. Phosphated zone area ratio = S1/(S1 + S2)
Example 3:
1. adobe Photoshop CS6 is opened, the new canvas is built for Ctrl + N, Ctrl + O opens the corrosion photo to be processed. As shown in fig. 7.
2. Selecting a magic rod tool, clicking on the corrosion picture, selecting a target corrosion representative area, and then clicking right to select similar. As shown in fig. 8.
3. Finding "image" - "analyze" - "record measure" in the menu bar, the bonderized area S1 can be found under the software.
And 4.Ctrl + Shift + I, and carrying out reverse selection to obtain a non-phosphorized area. As shown in fig. 9.
5. Finding "image" - "analyze" - "record measure" in the menu bar, one can find the non-phosphatized area under the software S2.
6. Phosphated zone area ratio = S1/(S1 + S2)
Example 4:
1. adobe Photoshop CS6 is opened, the new canvas is built for Ctrl + N, Ctrl + O opens the corrosion photo to be processed. As shown in fig. 10.
2. Selecting a magic rod tool, clicking on the corrosion picture, selecting a target corrosion representative area, and then clicking right to select similar. As shown in fig. 11.
3. Finding "image" - "analyze" - "record measure" in the menu bar, the bonderized area S1 can be found under the software.
And 4.Ctrl + Shift + I, and carrying out reverse selection to obtain a non-phosphorized area. As shown in fig. 12.
5. Finding "image" - "analyze" - "record measure" in the menu bar, one can find the non-phosphatized area under the software S2.
6. Phosphated zone area ratio = S1/(S1 + S2)
Example 5:
1. adobe Photoshop CS6 is opened, the new canvas is built for Ctrl + N, Ctrl + O opens the corrosion photo to be processed. As shown in fig. 13.
2. Selecting a magic rod tool, clicking on the corrosion picture, selecting a target corrosion representative area, and then clicking right to select similar. As shown in fig. 14.
3. Finding "image" - "analyze" - "record measure" in the menu bar, the bonderized area S1 can be found under the software.
And 4.Ctrl + Shift + I, and carrying out reverse selection to obtain a non-phosphorized area. As shown in fig. 15.
5. Finding "image" - "analyze" - "record measure" in the menu bar, one can find the non-phosphatized area under the software S2.
6. Phosphated zone area ratio = S1/(S1 + S2)
The above embodiments are only used to illustrate but not to limit the technical solutions of the present invention, although the above embodiments are referred to
Having described the invention in detail, it will be understood by those of ordinary skill in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (1)
1. A method for quantitatively evaluating a rusty area is characterized by comprising the following steps:
(1) opening Adobe Photoshop CS6, creating a new canvas with Ctrl + N, and opening a corrosion photo to be processed with Ctrl + O;
(2) selecting a magic rod tool, clicking on the corrosion picture, selecting a target corrosion representative area, and then clicking to select similarity;
(3) finding an image in a menu bar, analyzing, recording and measuring, namely finding a phosphorization area S1 below the software;
(4) ctrl + Shift + I, and obtaining a non-phosphorized area through reverse selection;
(5) Finding an image in a menu bar, analyzing, recording and measuring, namely finding a non-phosphorized area S2 below software;
(6) the phosphorized region area ratio = S1/(S1 + S2).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595736A (en) * | 2020-11-20 | 2021-04-02 | 唐山钢铁集团有限责任公司 | Method for quantitatively evaluating compactness of phosphating film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621056A (en) * | 2012-03-29 | 2012-08-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for quantitatively measuring rusting ratio of surface of metal material |
| CN106153635A (en) * | 2016-09-27 | 2016-11-23 | 山东省科学院新材料研究所 | The quantitative detecting method of defect in a kind of magnesium and magnesium alloy |
| CN106770327A (en) * | 2016-12-26 | 2017-05-31 | 钢铁研究总院 | A kind of quantitative detecting method of the surface corrosion area for hot-rolled reinforced bar |
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- 2020-06-18 CN CN202010560299.1A patent/CN111862188A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621056A (en) * | 2012-03-29 | 2012-08-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for quantitatively measuring rusting ratio of surface of metal material |
| CN106153635A (en) * | 2016-09-27 | 2016-11-23 | 山东省科学院新材料研究所 | The quantitative detecting method of defect in a kind of magnesium and magnesium alloy |
| CN106770327A (en) * | 2016-12-26 | 2017-05-31 | 钢铁研究总院 | A kind of quantitative detecting method of the surface corrosion area for hot-rolled reinforced bar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595736A (en) * | 2020-11-20 | 2021-04-02 | 唐山钢铁集团有限责任公司 | Method for quantitatively evaluating compactness of phosphating film |
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