JPH0412258A - Aerosol type liquid penetrant, aerosol type detergent and aerosol type developer used for solvent removal liquid penetrant testing method - Google Patents

Abstract

PURPOSE:To allow the flow detection with high accuracy without destroying the ozone layer by using CFC-152a or CFC-152a and the compressed gas selected from gaseous introgen, carbon dioxide and air for the injecting agent of the aerosol type penetrant. CONSTITUTION:The CFC-152a or CFC-152a and the compressed gas selected from the gaseous nitrogen, carbon dioxide and air are used as the aerosol injecting agent of the so-called penetrant, such as the solvent removable dye essentially consisting of a dye, base solvent and diluting soln., the detergent essentially consisting of the fluorescent penetrant and a volatile org. solvent or the quick drying type developer essentially consisting of fine white powder and the volatile org. solvent. Then, the CFC-152a does not destryo the ozone layer. In addition, the uniform spraying state is obtd. and the degradation in the flaw detection performance is obviated. The posing of pollution problems, such as the destroying of the ozone layer is obviated and the results of the flaw detection with the high accuracy is expected in the execution of the solvent removable liquid penetrant testing.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an aerosol-type solvent-removable dyeing or fluorescent penetrating liquid, an aerosol-type cleaning agent, and an aerosol-type quick-drying developer used in a solvent-removable penetrant testing method. Aerosol-type solvent-removable penetrating liquid, aerosol-type cleaning agent, and aerosol-type quick-drying developer that are highly safe, do not cause pollution problems, especially ozone layer depletion problems, and provide highly accurate flaw detection results even at L2 level. It provides:

[Conventional technology]

As is well known, penetrant testing methods are used to detect surface opening defects (hereinafter referred to as "defects") such as minute racks and minute pinholes that exist on the surfaces and welding areas of various equipment and components. is rJIS Z 2343-
1.982J, and as shown in the standard, there are various penetrant testing methods that use various combinations of penetrants, cleaning agents, and developers. Symbol 'V C-3J row OtokorFC-3
There is a penetrant test method that uses a combination of a solvent-removable dye or fluorescent penetrant liquid, a cleaning agent (solvent), and a quick-drying developer, which are classified in 1. (referred to as “test method”).

Now, typical aspects of the solvent removable penetrant testing method are as follows.

After applying a solvent-removable dye or fluorescent penetrating liquid to the surface of the test piece and performing a penetrating treatment to infiltrate the defective part with the penetrating liquid, the surface of the test piece is washed with a cleaning agent to remove the surface of the test piece. A removal process is performed to remove the excess penetrating liquid remaining on the surface of the specimen, and then a developer in which fine white powder is dispersed in a volatile organic solvent is applied to the surface of the test specimen to form a thin layer of fine white powder. After the thin layer surface is developed to reveal a defect-indicating blot pattern caused by the penetrant that has penetrated into the defect, the surface of the test piece is exposed to white light if a solvent-removable dye penetrant is used. A test method that detects the presence and location of defects by observation under an ultraviolet lamp when a solvent-removable fluorescent penetrant is used.

Next, as is well known, the three components used in the solvent-removable penetrant testing method, such as the solvent-removable dye or fluorescent penetrant, the cleaning agent, and the quick-drying developer, are handled as a set. In many cases, those skilled in the art collectively refer to these three agents as "penetrant testing agents." In the present invention, in the following description, the three types will be collectively referred to as "penetrating flaw detection agent J" unless it is necessary to distinguish between these three types.

[Non-destructive testing handbook edited by Japan Non-destructive Testing Association]
New Edition] - Nikkan Kogyo Shimbun, p. 730 (first edition published on April 28, 1978), section ``3.1 Simple Portable Equipment'' states, ``In general, this type of equipment is suitable for solvent-removable penetrant testing. Used in case of test method.

...Containers for flaw detection agents include open containers and aerosol cans. The aerosol can serves as both a container for the flaw detection agent and a dispersion mechanism for the flaw detection agent, and the airtight container is filled with the flaw detection agent and a liquid gas such as chlorofluorocarbon gas, liquefied petroleum gas, or dimethyl ether.

As stated in ``...'', there are cases where a penetrant is sealed in an aerosol can with a propellant and used as an aerosol-type penetrant.

The following aerosol type penetrant testing agents are currently widely used among those skilled in the art.

The aerosol-type solvent-removable dye penetrating liquid uses a red oil-soluble dye (for example, Orient Oil Red 5B made by Orient, Subitasol Fast Red FW made by Futaba Chemical Research Institute, etc.) as a dye, and the dye 1 to 5M. 20 to 50 parts by weight of a base solvent consisting of a plasticizer (for example, DOP, GoCP, etc.) or a vegetable oil (for example, soybean oil), and 1. )・50 to 90 weight dilution solvent consisting of a volatile low to medium boiling point organic solvent selected from 1.1.2.2 tetrachloro12 difluoroethane, fluorinated propatool, calpitol, butyl calpitol, etc. A highly permeable liquid dissolved in water is sealed in an aerosol can along with a propellant.A typical commercially available product is Super Check UP-NU (product name: manufactured by Mark Chick ■).
There is.

In addition, the aerosol-type solvent-removable fluorescent penetrant liquid contains a fluorescent dye (for example, C
, 1, Solvent Yellow 43: Manufactured by Morne Co., Ltd. in the United States,
C, T, Florefcent Bright Varnish Agent 6
Similar to the case of the aerosol-type solvent-removable dye penetrant solution, this highly penetrating liquid is dissolved in a base solvent and a diluent solvent, and is made into an air pool with a propellant. A typical commercially available product is Super Glow D-6000 (trade name: manufactured by Marktic ■).

Aerosol type cleaning agents include rubber volatile oil, n-hexane, henzine, n-hebutane, mineral turpentine, xylene,
Ethanol, isopropyl alcohol, trichloroethane, trichloroethylene, 1. It consists of a volatile low-boiling organic solvent selected from 1.1 trichloroethane, 1.1.2.2 tetrachloro1.2 difluoroethane, dichloropentafluoropropane, etc., and can be used for various commercially available aerosol-type solvent-removable dyes or fluorescent penetrants. A combination of aerosol-type cleaning agents containing various organic solvents in appropriate proportions is commercially available.For example, the above-mentioned Super Check UP-NU includes Super Check UR-NO (product name: Made by Mark Taesoku ■) is the aforementioned Super Glow〇D
-6000, Super Glow R-n (trade name: manufactured by Mark Chick ■) was applied to Cera).

The aerosol type quick-drying developer consists of 5 to 10 parts by weight of fine white powder selected from fine magnesium carbonate powder, hydrated silicic acid fine powder, fine silicic acid anhydride powder, etc. with a particle size of 1 to 2 μm, rubber volatile oil, n-hexane, etc. , benzine, n-hebutane, methyl alcohol, ethyl alcohol, isopropyl alcohol,
l-dichloroethane, trifluorotrichloroethane,
1.1. II.Dichloroethane, 1.1. ．． 2.2Tetrachloro1.2A dispersion in a volatile low-boiling organic solvent selected from difluoroethane, dichloropentafluoropropane, etc. is sealed in an aerosol can with a propellant, and it is compatible with commercially available aerosol type solvent removers. For each color dye or fluorescent penetrant, a combination of aerosol-type quick-drying developers containing Kita's various fine powders and the above-mentioned organic solvents in appropriate proportions is commercially available.For example, the above-mentioned Super Check UPNU Along with the aforementioned Super Check UR-NU, the Super Check UD-NU (product name: manufactured by Mark Chick ■) is included, and the aforementioned Super Glow 0D-6000 includes the Super Glow D along with the Super Glow R and -II.
N-60O3 (product name: Mark Chick ■) is set.

As mentioned above, CFC gas, liquefied petroleum gas, dimethyl ether, etc. are used as the above-mentioned propellants, and CFC 11 (1-lichloromonofluoromethane) and CFC 12 (dichlorodifluoromethane) are used. It is commonly used.

[Problem to be solved by the invention]

As mentioned above, Freon 11 and Freon 12 are commonly used as propellants for aerosol type penetrant testing agents used in solvent removable penetrant testing methods. It is said that the solvent removable penetrant testing method can be carried out without problems due to inhalation toxicity.

However, the use of Freon 11 and Freon 12 causes a new problem of destruction of the ozone layer.

The technical object of the present invention is to provide an aerosol penetrant flaw detection agent that does not cause the pollution problem of ozone layer depletion and can provide highly accurate flaw detection results.

[Failure to solve the problem]

After conducting systematic studies on numerous compounds to achieve the above-mentioned problems, the present inventor found that Freon 152a has the following excellent properties as a propellant for an aerosol type penetrant tester. I found out that there is.

In other words, 1) it does not destroy the ozone layer, and 2) it provides a uniform spray condition and has excellent flaw detection performance when used as a substitute for the above-mentioned nine rules conventionally used as a propellant for aerosol-type penetrant flaw detection agents. (1) Even when used in combination with a compressed gas selected from nitrogen gas, carbon dioxide gas, and air as necessary, a uniform spray state can be obtained and the flaw detection performance will not be deteriorated.

Therefore, the above technical problem is solved by providing the following aerosol type penetrant testing agent.

That is, in an aerosol-type solvent-removable dyeing or fluorescent penetrating liquid in which a solvent-removable dyeing or fluorescent penetrating liquid containing a dye, a base solvent, and a diluting solvent as essential components is sealed in an aerosol can together with a propellant, the propellant is Freon 152a. Or an aerosol-type solvent-removable staining or fluorescent penetrant liquid used in the solvent-removable penetrant testing method, which is Freon 152a and a compressed gas selected from nitrogen gas, carbon dioxide gas, and air, and cleaning that contains a volatile organic solvent as an essential component. In the aerosol type cleaning agent, which is made by sealing the agent together with a propellant in an aerosol can,
An aerosol-type cleaning agent used in a solvent-removable penetrant testing method in which the propellant is Freon 152a or Freon 152a and a compressed gas selected from nitrogen gas, carbon dioxide gas, and air, and the essential ingredients are white fine powder and a volatile organic solvent. In an aerosol-type quick-drying developer, which is made by sealing a quick-drying developer with a propellant in an aerosol can, the propellant is fluorocarbon 1.
This is an aerosol-type quick-drying developer used in a solvent-removable penetrant test method, which is composed of 52a or Freon 152a and a compressed gas selected from nitrogen gas, carbon dioxide gas, and air.

When carrying out the solvent-removable penetrant testing method according to the above-mentioned JIS standard using the aerosol-type penetrant testing agent according to the present invention as described above, accuracy can be achieved without the danger of ozone layer depletion. It is guaranteed that high flaw detection results can be obtained.

Next, the configuration of the present invention will be explained in more detail.

First, the most important fluorocarbon 152a in the present invention will be explained.

Freon 152a-1,1 difluoroethane (CHF2C
I(:l)- has a boiling point of -25, o″C0 freezing point of 117°
It is an existing substance of C. And while the ozone depletion coefficient of Freon 11 and Freon 12 is 1.0, Freon 152
That of a is O.Next, the aerosol type penetrant testing agent according to the present invention is the same as the general-purpose aerosol type penetrant testing agent described above except for the propellant.

That is, the formulation of the penetrant itself in the aerosol penetrant according to the present invention is the same as that in the aforementioned general-purpose aerosol penetrant.

However, when selecting the above-mentioned volatile low-to-medium boiling point solvents to be used for solvent-removable dyeing or fluorescent penetrant liquid itself, it is important to note that the selected organic solvent violates the Organic Solvent Poisoning Prevention Regulations (hereinafter referred to as the "Organic Series"). In case 62, the amount of the organic solvent must be kept at 5 parts by weight or less. Furthermore, when selecting the above-mentioned volatile low boiling point solvent to be used in the cleaning agent itself, the selected organic solvent must naturally be considered in accordance with organic rules. Furthermore, when selecting the above-mentioned continuous low boiling point solvent to be used in the quick-drying developer itself, consideration must naturally be given to organic rules regarding the selected organic solvent.

In addition, 1 to 2 parts by weight of a rust preventive agent such as nitromethane or ethylenediamine may be added to the aerosol penetrant flaw detection agent according to the present invention.

The preparation of the aerosol type penetrant testing agent according to the present invention is easy; first, the penetrant testing agent itself is prepared by weighing out the required ingredients so that they have the required formulation, mixing them, and stirring them. Then, the penetrant test agent itself was diluted with Freon 15.
2a or Freon 152a and a compressed gas selected from nitrogen gas, carbon dioxide gas, and air may be used as a propellant and sealed in an aerosol can according to a conventional method. When enclosing, if the propellant is fluorocarbon 152a alone, fluorocarbon 152a
It is preferable to set the volume ratio between fluorocarbon 152a and the penetrant testing agent itself to 1 to 1.1:1, and to seal it at a filling pressure of 3 to 4 kg/cffl. If the selected compressed gas is Freon 152
The volume ratio of a and the penetrant testing agent itself is set to 0.1 to 0.3:1, and after both are filled, compressed gas is filled to a filling pressure of 5 to 1.
It is preferable to enclose it at 6 kg/af,
In either case, the penetrant flaw detection agent itself can be sprayed to the end.

Next, the method of using the aerosol type penetrant testing agent according to the present invention is as follows.
There is no difference from the case of the general-purpose aerosol type penetrant testing agent mentioned above.

That is, in a typical embodiment of the solvent-removable penetrant testing method, during the penetrant treatment, the aerosol-type solvent-removable dye or fluorescent penetrant liquid according to the present invention is applied from the surface of the test piece for about 15 minutes.
Spray uniformly from a distance of ~20 cm, and during the removal process, spray the aerosol type cleaning agent of the present invention onto a paper towel or cloth to soak the cleaning agent itself, and then use the paper towel or cloth to remove the excess on the surface of the test piece. The penetrating liquid is wiped off, and during the development process, the aerosol type quick-drying developer according to the present invention is uniformly sprayed at a distance of about 20 to 30 cm from the surface of the test piece.

[Operation] Freon 152a, which is the propellant of the aerosol type penetrant flaw detection agent according to the invention, does not contain chlorine (C1) and therefore does not destroy the ozone layer.

Further, since the Freon 152a exhibits the same behavior as Freon 11 and Freon 12, which have been conventionally used as propellants, a uniform spray state can be obtained.

By appropriately selecting the above-mentioned various organic solvents used in the penetrant itself, as shown in the examples below, an extremely safe aerosol type penetrant can be prepared.

〔Example〕

Next, the present invention will be explained with reference to formulation examples and solvent removability penetrant test evaluation results.

■, aerosol-type solvent-removable staining or fluorescent penetrating liquid A;
1. 1. ll-lichloroethane 90% by weight, T
CP (manufactured by Oiri Kagaku) 8.5% by weight and Spixol Fas 1-Red FW (manufactured by Futaba Kagaku Kenkyushin) 1.5% by weight
Prepare the penetrating solution by thoroughly mixing them, and add 225d of the penetrating solution and 225m of Freon 152a in a commercially available 450 type azole can.
l! and an aerosol-type solvent-removable dye penetrating solution (
A filling pressure of 3 kg/c was obtained.

B. Thoroughly mix 80% by weight of fluorinated propatool, 7.5% by weight of DOP (manufactured by Oiri Kagaku), 7.5% by weight of TOP (manufactured by Oiri Kagaku), and 5% by weight of Sudan Red 462 (manufactured by BASF). Prepare the permeate, put 225 aft of the permeate into a commercially available 450 type azol can, fill it with 50 ml of Freon 152a, and then add compressed gas (
0.5 g of nitrogen gas was filled to obtain an aerosol-type solvent-removable dye penetrant (filling pressure: 5 kg/cJ).

C, xylene 60% by weight, DOP (Oiri Kagaku) 28
．． 5% by weight, 10% by weight of kerosene (white kerosene), and 1.5% by weight of Orient Oil Red 5B (manufactured by Orient) were thoroughly mixed to prepare a penetrant solution, and the penetrant solution 200% was poured into a commercially available 300 type azole can. and then Freon 152
a50#! i! After filling, the container was further compressed and filled with 4 g of gas (carbon dioxide gas) to obtain an aerosol-type solvent-removable dye penetrant (filling pressure of 5.5 kg/c+f).

D.1. 1. 2. 2-tetrachloro-1.2-difluoroethane 78.5% by weight, TCP (manufactured by Oiri Kagaku)
A penetrating solution was prepared by thoroughly mixing 10% by weight of methylene chloride, 4% by weight of Solvent Yellow 43 (manufactured by Morton), and 0.5% by weight of White Fluor B (manufactured by Sumitomo Chemical Co., Ltd.). Pour the permeate liquid 2 into the azole can.
10FnIV and Freon 152a240d to form an aerosol-type solvent-removable fluorescent penetrant (filling pressure 4.
3 kg/Ci).

2. Aerosol type cleaning agent E, 1. in a commercially available 450 type azole can. 1. An aerosol type cleaning agent (filling pressure: 3 kg/cif) was obtained by filling 225 d of 1-trichloroethane and 225 m of 152 a of Freon.

F. Pour 225 ml of dichloropentafluoropropane into a commercially available 450 model azole can, then add Freon 152
After filling with a50-, compressed gas (nitrogen gas) 0.
Fill 5g of aerosol type cleaning agent (filling pressure 5kg/a
jt) was obtained.

G. Put 200+d of rubber volatile oil (gasoline) into a commercially available 300 type azole can, then fill it with Freon 152a50d, and then fill it with 4g of compressed gas (carbon dioxide) to make an aerosol type cleaning agent (filling pressure: 5.5kg) /cJ) was obtained.

H1 commercially available 450 type azole can 1.1. ．． Mixture of 80% by weight of 22tetrachloro1.2difluorothane and 20% by weight of methylene chloride vA210d and Freon 152a
240ml! An aerosol type cleaning agent (filling pressure: 4.3 kg/colt) was obtained.

3. Aerosol type quick-drying developer T, 1.1.1+-lichroethane 92% by weight, magnesium carbonate silver M (Shishin Kagaku) 6.5% by weight and Erosil #200 (Nippon Aeroseal)■, 5wt. % to prepare a quick-drying developer, and add 225 m of the developer and 152 m of Freon to a commercially available 450 type azole can.
Q and fill it with an aerosol type quick-drying developer (filling pressure 4.
3 kg/1af).

J. A quick-drying developer was prepared by dispersing 6% by weight of magnesium carbonate Ginsei (manufactured by Shinshin Kagaku) and 4% by weight of Carplex #1120 (manufactured by Shionogi & Co., Ltd.) in 89% by weight of dichloropentafluoropropane, Pour 225 ml of the developer into a commercially available 450 type azole can, then add 15 fluorocarbons.
After filling 2a50m, further compressed gas (nitrogen gas) 0
．． Fill 5g of aerosol type quick-drying developer (filling pressure 5
．． 5 kg/c-J).

K, T in 92% by weight of isopropyl alcohol.

A quick-drying developer was prepared by dispersing 6% by weight of T magnesium carbonate (manufactured by Tokuyama Soda) and 2ffi amount of Erosil #200 (manufactured by Nippon Aeroseal), and the developer was placed in a commercially available 300 type azole can. Next, Freon 152a5
After filling with 0ml, further fill with 4g of compressed gas (carbon dioxide) to create an aerosol type quick-drying developer (filling pressure: 5.5k).
g/cffl).

L, 1. , 1. 2. 8% by weight of calcium carbonate PC (manufactured by Shiraishi Industries) was dispersed in a mixture of 81% by weight of 2-tetrachloro1.2-difluorothane, 8% by weight of n-hebutane, and 3% by weight of olben (manufactured by Shiraishi Industries). A dry developer was prepared, and 210 ml of the penetrant was poured into a commercially available 450 type azole can. and Freon 152a240d to create an aerosol type quick-drying developer (filling pressure 4.3 kg/cf
fl) was obtained.

4. Solvent-removable dye penetrant test evaluation results (1) According to U.S. military standard MTL-■-251,35D, 1-A-
A performance comparison was made between the aerosol-type solvent-removable dyeing penetrant liquid of C and the aforementioned Super Check UP-NU.

That is, a quench-cracked 2024 aluminum alloy test piece (thickness 8III11, 76 mm x 5
211II11 at the center of the surface of a 1+nm rectangular plate.
(divided into two with a groove of ×2■, one side is A side and the other side is B side), and on the A side, apply 1-A aerosol type solvent removable dye penetrating liquid about 20 minutes from the test surface. Separate the mark and spray evenly. Spray Super Check UP-NU evenly on side B from a distance of about 20 cm from the test surface. After leaving it for 10 minutes, wipe both sides with a dry, clean paper towel to remove excess penetrant. Wipe it off, then use the super check U mentioned above.
Both sides were wiped with a paper towel soaked with sprayed R-NU to remove excess penetrant. Next, place the aforementioned Super Check UI)-NU at a distance of about 30 cm from the test surface.
After spraying it uniformly on both sides and leaving it for 5 minutes, the defect indicating patterns on both sides were visually compared, and the detection sensitivities on both sides were found to be the same.

The same performance comparison as above was also carried out for the aerosol-type solvent-removable dye penetrant liquids No. 1, -B and C, and they were all equivalent to Super Check UP-NU.

In addition, regarding 1-D's aerosol-type solvent-removable fluorescent penetrating liquid, the above-mentioned Super Glow D-600 is used as a comparative product.
0, the above-mentioned Super Glow R-n was used as the cleaning agent, and the above-mentioned Super Glow DN-60OS was used as the dry developer, in the same manner as above (visual comparison was performed under ultraviolet lamp irradiation). We compared the performance of the two methods and found that the detection sensitivity was the same.

(2) Based on the same standards as in (1), performance comparisons were made between the aerosol type cleaning agents 2-E to G and the aforementioned Super Check URNU.

That is, on both sides A and B of the same test piece as in (1), about 2
0 [Separate and spray Super Check UPNU evenly, leave it for 10 minutes, wipe both sides with dry and clean paper towels to remove excess penetrant, then apply 2E on side A.
The B side was wiped with a paper towel soaked with an aerosol-type cleaning agent sprayed on it, and the B side was wiped with a paper towel soaked with a spray of Super Check UR-NU, and the excess penetrant was wiped off. Next, super check UDNU
was sprayed uniformly on both sides at a distance of about 30 cm14 from the test surface, and after being left for 5 minutes, the defect indicating patterns on both sides were visually compared, and the detection sensitivities on both sides were the same.

2-F and G aerosol type cleaning agents were also compared in the same manner as above, but both were Super Check UR-
It was equivalent to NU.

Regarding the 2-H aerosol type cleaning agent, the above-mentioned Super Glow R1■ was used as a comparative product, the above-mentioned Super Glow 0I)-6000 was used as the penetrating liquid, and the above-mentioned Super Glow DN- was used as the quick-drying developer. A performance comparison was performed using 60O3 in the same manner as above (the visual comparison was performed under irradiation with an ultraviolet lamp), and the detection sensitivity was the same.

(3) Based on the same specifications as (1), the aerosol type quick-drying developer of 3-I~ and the above-mentioned Super Check Ul)-N
We compared the performance with U.

That is, spray Super Check UPNU evenly on both sides A and B of the same test piece as in (1) at a distance of about 20 cm from the test surface, leave it for 10 minutes, and then wipe both sides with a dry, clean paper towel to remove excess penetration. The liquid was wiped off, and then both sides were wiped with a paper towel impregnated with Super Check UR-NU by spraying, and excess penetrating liquid was further wiped off. Next, side B is masked to prevent developer from adhering to it, and
iI aerosol type quick-drying developer about 30cm from the test surface
Spray uniformly on side A from a distance of 300 m, immediately mask side A to prevent developer from adhering to it, peel off the mask on side B, and apply Super Check UD-NU from the test surface by about 30 mm.
? The mask was separated from Il and sprayed uniformly on side B, then the mask on side A was removed, and after being left for 5 minutes, the defect indication patterns on both sides were visually compared, and the detection sensitivity on both sides was the same.

The same performance comparison as above was made for the aerosol type quick-drying developers: 3-J and 3-J, and all of them were equivalent to Super Check UI)-NU.

In addition, for the 3-L aerosol type quick-drying developer, the aforementioned Super Glow DN-60O3 was used as a comparison product.
Performance comparisons were made in the same way as above (visual comparisons were made under ultraviolet lamp irradiation) using Super Glow D6000 as the penetrant and the aforementioned Super Glow R-n as the cleaning agent. Detection sensitivity was similar.

5. Solvent-removable penetrant testing test example 1-A aerosol-type solvent-removable dye penetrant was placed on a type A comparison test piece for sensitivity testing according to the JIS-Z-2341-1982 standard at a distance of about 15 (2) from the test surface. After performing the penetration treatment, spray the test piece evenly with water and leave it for 5 minutes, then wipe the test piece with a dry rag, and then remove the excess penetration with a rag that has been soaked by spraying 2-E aerosol type cleaning agent. After removing the liquid by wiping off the liquid, apply 3-1 aerosol type quick-drying developer to the test piece for about 30 minutes from the test surface.
cIn was sprayed uniformly at a distance to form a thin layer of approximately 30 μm in thickness, and developed by leaving it for 7 minutes. When the test piece was visually observed, a clear red defect-indicating bleeding pattern was observed on a white background. was clearly recognized.

Combination of 1-B aerosol-type solvent-removable dye penetrating solution, 2-F aerosol-type cleaning agent and 3-J aerosol-type quick-drying developer, and 1-C aerosol-type solvent-removable dye penetrant solution, 2- The same flaw detection test as above was conducted using a combination of the aerosol type cleaning agent (G) and the aerosol type dry method (3-), but in both cases, a clear red defect indicator blot pattern was clearly observed on a white background. It was done.

Also, 1. -D aerosol-type solvent-removable fluorescent penetrant liquid;
When a similar flaw detection test was conducted as above (visual comparison was performed under ultraviolet light irradiation) using a combination of 2-H aerosol type cleaning agent and 3L aerosol type dry developer, a clear yellow-green color was detected. A fluorescent defect indicator pattern was clearly observed.

6. Aerosol Performance Each aerosol-type solvent-removable dyeing or fluorescent penetrating liquid of 1-A-D, each aerosol-type cleaning agent of IE to I (and 3-1-
It was confirmed that each of the aerosol-type quick-drying developers L produced a uniform spray state during spraying, and that uniform and constant spraying was possible until all the contents were turned into small balls.

〔Effect of the invention〕

The aerosol type penetrant testing agent according to the present invention does not cause the problem of ozone layer depletion, and moreover, can provide highly accurate flaw detection results similar to those obtained when using conventional aerosol type penetrant testing agents.

Therefore, it can be said that the present invention has the remarkable effect of allowing the solvent removable penetrant testing method to be carried out with peace of mind in today's world where environmental protection is required.

Claims (3)

[Claims] (1) Solvent-removable dyeing or aerosol-type solvent-removable dyeing made by sealing a fluorescent penetrating liquid together with a propellant in an aerosol can, or An aerosol-type solvent-removable dye used in a solvent-removable penetrant testing method, characterized in that, in the fluorescent penetrant liquid, the propellant is Freon 152a or Freon 152a and a compressed gas selected from nitrogen gas, carbon dioxide gas, and air. or fluorescent penetrant. (2) In an aerosol type cleaning agent in which a cleaning agent containing a volatile organic solvent as an essential component used in a solvent removability penetrant testing method is sealed in an aerosol can together with a propellant, the propellant is CFC 152a or CFC 152a. An aerosol-type cleaning agent used in a solvent-removable penetrant testing method, characterized in that it is a compressed gas selected from nitrogen gas, carbon dioxide gas, and air. (3) An aerosol-type quick-drying developer in which a quick-drying developer containing a white fine powder and a volatile organic solvent as essential components used in a solvent-removable penetrant test method is sealed in an aerosol can together with a propellant. An aerosol-type quick-drying developer used in a solvent-removable penetrant test method, characterized in that the agent is Freon 152a or Freon 152a and a compressed gas selected from nitrogen gas, carbon dioxide gas, and air.