CN107626614B - Pre-cleaning method for penetration detection - Google Patents
Pre-cleaning method for penetration detection Download PDFInfo
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- CN107626614B CN107626614B CN201710917587.6A CN201710917587A CN107626614B CN 107626614 B CN107626614 B CN 107626614B CN 201710917587 A CN201710917587 A CN 201710917587A CN 107626614 B CN107626614 B CN 107626614B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000035515 penetration Effects 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004744 fabric Substances 0.000 claims abstract description 21
- 239000012459 cleaning agent Substances 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 5
- 239000004519 grease Substances 0.000 claims abstract description 5
- 239000000725 suspension Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 description 6
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- -1 electricity Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000000861 blow drying Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000002357 osmotic agent Substances 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a pre-cleaning method for permeation detection, which comprises the following steps: (1) removing water, oil stain, grease, dust or other attachments on the detected surface by using a tool; (2) and (3) spraying a cleaning agent on the surface to be detected, and wiping the surface to be detected clean by using clean non-fluff cloth. (3) Naturally drying, wherein the dried detected surface is required to be clean, (4) fully shaking the solvent suspension type developer, and uniformly spraying the developer on the detected surface, (5) waiting for 10-15 min, and if the color of the developer coating on the detected surface is uniform and has no obvious change, performing the next step; (6) firstly, the developer is wiped off as much as possible by using a clean cloth, and then the surface to be detected is wiped clean by using the clean non-fluff cloth sprayed with the cleaning agent. (7) Naturally drying, and cleaning the dried detected surface without residues of cleaning agent and developer. The invention can effectively remove the water, oil and other pollutants in the discontinuity.
Description
Technical Field
The invention relates to the field of penetration detection of nondestructive testing, and mainly relates to a penetration detection precleaning method.
Background
The penetration detection is a nondestructive detection method for detecting the discontinuity of the surface opening of a solid material based on the capillary action (capillarity) of liquid, can detect various metal (including non-ferromagnetic metal) materials and non-metallic materials, is suitable for surface quality detection of raw materials, parts in process, finished parts and in-service parts, and has wide application. Before the penetration test, the surface to be tested is pre-cleaned and dried, and then a suitable penetrant (fluorescent dye or colored dye) is applied to the test area, which penetrates into the discontinuities of the surface openings to be tested due to capillary action. After a suitable penetration time, the excess penetrant on the surface is removed, the developer is applied, and the penetrant infiltrated into and retained in the discontinuity is sucked out by capillary action, so that a clear, easily visible and magnified discontinuous display is obtained.
The permeation test method is mainly classified according to the test material used, and although there are many differences between the processes of the various test methods, pre-cleaning is performed in advance. The purpose of pre-cleaning is to make detection preparation, remove pollutants and excess substances which hinder penetration detection and affect detection quality on the detected surface and in the discontinuity, prevent penetrating agents from conveniently penetrating into any discontinuity, prevent interfering background and false display from being formed, cover related display, and make poor pre-cleaning one of important reasons for causing penetration detection failure, detection omission and misjudgment. Water and oil may infiltrate the discontinuity forming an infiltration plug, the most commonly encountered contaminant that impedes the penetration of the osmotic agent into the discontinuity. Correspondingly, the pre-cleaning method comprises a plurality of methods such as water-based cleaning agent cleaning, solvent cleaning, chemical cleaning, ultrasonic cleaning and the like, the cleaned parts must be thoroughly dried, and in the actual work, the methods of oven drying, hot compressed air blow drying or natural drying are commonly used. However, for local inspection and on-site inspection of large-sized workpieces, and for inspection sites where conditions such as water, electricity, and gas are insufficient, and the like, which are subject to the restrictions of conditions, a solvent-removal type coloring (fluorescence) penetrant inspection method is generally used, and a spray pot penetrant inspection agent is used, and the specific operation procedure is as follows: precleaning, penetration, dripping, solvent cleaning, developing, inspection and post-cleaning. The pre-cleaning is solvent cleaning, and the specific method comprises the following steps: (1) removing water, oil stain, grease, dust or other attachments on the surface to be detected by using tools such as an iron brush, a hairbrush, clean cloth and the like; (2) spraying a cleaning agent on the surface to be detected, and then wiping the surface to be detected clean by using clean non-fluff cloth; (3) and (5) naturally drying. Then, the next infiltration operation can be carried out. This method is difficult to remove water, oil, and the like remaining in the discontinuity, only by cleaning the surface to be inspected.
Disclosure of Invention
The invention aims to provide a penetration detection pre-cleaning method, which is suitable for local detection and field detection of large-scale workpieces and detection places with insufficient conditions of water, electricity, gas and the like, can effectively remove pollutants such as water, oil and the like in the discontinuity of the detected surface by utilizing the existing conditions, improves the discontinuity detection rate and ensures the detection quality.
The purpose of the invention can be realized by adopting the following technical scheme:
the pre-cleaning method for the penetration detection comprises the following steps:
(1) removing water, oil stain, grease, dust or other attachments on the surface to be detected by using tools such as an iron brush, a hairbrush or clean cloth;
(2) and (3) spraying a cleaning agent on the surface to be detected, and wiping the surface to be detected clean by using clean non-fluff cloth. The cleaning area of the surface which only needs to be detected locally is large enough and at least extends 25mm outwards from the periphery of the detected part;
(3) naturally drying, wherein the dried detected surface is clean and has no water stain, oil stain and cleaning agent residue;
(4) after fully shaking the solvent suspension type developer (non-aqueous wet developer), uniformly spraying the developer 300-400 mm away from the detected surface so that the detected surface cannot be seen;
(5) waiting for 10-15 min, and if the color of the detected surface developer coating is uniform and does not change obviously, performing the next step; if the developer coating has a water or oil revealing mark, the developer is wiped off as much as possible with a clean cloth wipe, and steps (2) to (5) are repeated.
(6) Firstly, the developer is wiped off as much as possible by using a clean cloth, and then the surface to be detected is wiped clean by using the clean non-fluff cloth sprayed with the cleaning agent.
(7) Naturally drying, and cleaning the dried detected surface without residues of cleaning agent and developer.
Then, the next infiltration operation can be carried out.
The principle of the invention is as follows: the development process is a capillary phenomenon, as is the discontinuous process of penetrant penetration. Since the developing powder in the developer is very fine, its particle size is in the order of micrometers. When the particles cover the surface of the part, gaps among the particles are similar to capillaries, and water, oil, penetrants and the like in the discontinuity easily rise along the gaps and permeate back to the surface of the part to form the display. The solvent in the solvent suspension type developer has good penetrating power, can penetrate into the discontinuity, volatilizes quickly, and brings water, oil and the penetrant in the discontinuity back to the surface of the part in the volatilizing process.
In conclusion, the invention skillfully utilizes the capillary action of the developer, can effectively remove the water, oil and other pollutants which are remained in the discontinuity, ensures that the penetrant can fully and conveniently permeate into the discontinuity, improves the discontinuous detection rate, and is particularly suitable for local detection and field detection of large-sized workpieces and detection places with insufficient conditions of water, electricity, gas and the like.
Detailed Description
The present invention will be explained in detail by the following specific examples.
This example specifically illustrates a method for pre-cleaning for permeation detection, which includes the following steps:
(1) the method comprises the following steps of (1) removing water, oil stain, grease, dust or other attachments on the detected surface by using tools such as an iron brush, a hairbrush and clean cloth, wherein the clean cloth is adopted in the embodiment;
(2) spraying cleaning agent HR-ST on the surface to be detected, and wiping the surface to be detected clean by using clean lint-free cloth. The cleaning area of the surface which only needs to be detected locally is large enough and at least extends 25mm outwards from the periphery of the detected part;
(3) naturally drying, wherein the dried detected surface is clean and has no water stain, oil stain and cleaning agent residue;
(4) after fully shaking the solvent suspension type developer HD-ST uniformly, spraying the developer HD-ST on the surface to be detected uniformly, wherein the distance between the developer HD-ST and the surface to be detected is 300mm, and the developer HD-ST is preferably not seen on the surface to be detected;
(5) waiting for 15min, and if the color of the detected surface developer coating is uniform and has no obvious change, performing the next step; if the developer coating has water or oil display marks, wiping the developer with a clean cloth as much as possible, and repeating the steps (2) to (5);
(6) firstly, the developer is wiped off as much as possible by using a clean cloth, and then the surface to be detected is wiped clean by using the clean non-fluff cloth sprayed with the cleaning agent HR-ST.
(7) Naturally drying, and cleaning the dried detected surface without residues of cleaning agent and developer.
After the surface to be inspected is cleaned by the above method, the next infiltration operation can be carried out.
Claims (1)
1. A pre-cleaning method for penetration detection is characterized in that: it comprises the following steps:
(1) removing water, oil stain, grease or dust attachments on the detected surface by using an iron brush, a hairbrush or clean cloth;
(2) spraying a cleaning agent on the detected surface, wiping the detected surface by using clean non-fluff cloth, and only locally detecting the surface, wherein the cleaning area is large enough and at least extends 25mm outwards from the periphery of the detected part;
(3) naturally drying, wherein the dried detected surface is clean and has no water stain, oil stain and cleaning agent residue;
(4) after fully shaking the solvent suspension type developer (non-aqueous wet developer), uniformly spraying the developer 300-400 mm away from the detected surface so as to prevent the detected surface from being seen;
(5) waiting for 10-15 min, and if the color of the detected surface developer coating is uniform and does not change obviously, performing the next step; if the developer coating has water or oil display marks, wiping the developer with a clean cloth as much as possible, and repeating the steps (2) to (5);
(6) firstly, wiping off the developer as much as possible by using a clean cloth, and then wiping off the surface to be detected by using the clean non-fluff cloth sprayed with the cleaning agent;
(7) naturally drying, and cleaning the dried detected surface without residues of cleaning agent and developer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710917587.6A CN107626614B (en) | 2017-09-30 | 2017-09-30 | Pre-cleaning method for penetration detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710917587.6A CN107626614B (en) | 2017-09-30 | 2017-09-30 | Pre-cleaning method for penetration detection |
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| Publication Number | Publication Date |
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| CN107626614A CN107626614A (en) | 2018-01-26 |
| CN107626614B true CN107626614B (en) | 2020-06-23 |
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| CN201710917587.6A Active CN107626614B (en) | 2017-09-30 | 2017-09-30 | Pre-cleaning method for penetration detection |
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| CN110579322A (en) * | 2019-09-24 | 2019-12-17 | 开沃新能源汽车集团有限公司 | method for testing tightness of sanitation vehicle tank body |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10142166A (en) * | 1996-11-14 | 1998-05-29 | Nof Corp | Leakage inspecting agent and leakage inspecting method |
| CN102466644A (en) * | 2010-11-19 | 2012-05-23 | 江苏瑞特回转支承有限公司 | Penetrant testing method of opening defect on surface of workpiece |
| CN102095683B (en) * | 2010-11-26 | 2013-01-09 | 首钢总公司 | Method for rapidly detecting surface formation defect of thin sheet |
| CN102944501A (en) * | 2012-11-13 | 2013-02-27 | 西安航空动力股份有限公司 | Non-destructive testing method for detecting surface discontinuity of loose porous material |
| CN105717134A (en) * | 2014-12-04 | 2016-06-29 | 重庆旭新悦数控机械有限公司 | Penetrant testing process |
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Effective date of registration: 20211130 Address after: 471039 No. 96, Jianxi, Luoyang District, Henan, Jianshe Road Patentee after: LUOYANG LYC BEARING Co.,Ltd. Patentee after: Luoyang Bearing Group Railway Bearing Co.,Ltd. Address before: 471039 No. 96, Jianxi, Luoyang District, Henan, Jianshe Road Patentee before: LUOYANG LYC BEARING Co.,Ltd. |
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Address after: 471039 No. 96, Jianxi, Luoyang District, Henan, Jianshe Road Patentee after: Luoyang Bearing Group Co.,Ltd. Country or region after: Zhong Guo Patentee after: Luoyang Bearing Group Railway Bearing Co.,Ltd. Address before: 471039 No. 96, Jianxi, Luoyang District, Henan, Jianshe Road Patentee before: LUOYANG LYC BEARING Co.,Ltd. Country or region before: Zhong Guo Patentee before: Luoyang Bearing Group Railway Bearing Co.,Ltd. |