Penetrant for the color capillary defectoscopy

FIELD: capillary defectoscopy; compositions of the color penetrants.

SUBSTANCE: the invention is pertaining to the color capillary defectoscopy, in particular, to the compositions of the color penetrants applied to the color control over the items of the high-duty. The penetrant contains the mixture of the following composition: xanthene dyes of the yellow-orange fluoresceine and red-dark blue rhodamine of 3-6 %, the surfactant of 10-40 %, the rest - the dissolvent. The ratio of the mixture of the yellow-orange and the dark blue - red dyes compounds 1:2, as the surfactant use neonol or syntanol. The technical result of the invention is creation of the color penetrant of the lowered volatility, the reduced flammability, the extra-high sensitivity ensuring detection of the minimal flaw with the opening width of 0.5-1 microns and the improved reliability and stability of the monitoring of the items in conditions of repairs and operation.

EFFECT: the invention ensures detection of the minimal flaw with the opening width of about 1 micron, improved reliability and stability of the monitoring of the items in conditions of repairs and operation.

1 tbl

 

The invention relates to liquid penetrant inspection, in particular, compositions of penetrants - indicator for liquids fluorescent-colored industrial control products responsible assignment with class surface treatment Rz 20 and above. Penetrant works in fluorescent variant, under ultraviolet (UV) light. Defects are identified as orange lines, opening width minimum defect of 0.5-1 μm. The invention can be used to detect defects on the fragments of parts with surface finish Rz>10 μm. Rejection of parts due to gross defects opening width of 5-7 microns when using the penetrant is in the visible monochromatic light in the form of red lines and dots (for medium and low sensitivity).

The invention can be used in aviation, automobile, shipbuilding and other industries, and in industries: energy, chemical and nuclear industries, for detecting microdefects type of cracks, pores, rihlat, sinks, pitting corrosion and other defects.

The advantage of penetrants is reduced toxicity, detection of defects during irradiation products of UV rays, but also in daylight (at medium and low sensitivity control).

Known widely used color is haunted indicator fluid - the penetrants for fluorescent-dye penetrant, including solutions of rhodamine With a mixture of volatile solvents.

For the products of aviation technology use colored penetrant, including:

the solvent ethyl alcohol900 ml
- emulsifier OP-7 (OP-10)100 ml
- dye rhodamine30 g
or
the solvent ethyl alcohol805 ml
- triethanolamine135 ml
- dye rhodamine35 g

(The Handbook. Non-destructive testing of metal products. /Edited Thessaolonica. - M.: Mashinostroenie 1976).

For control of welded joints used fluorescent-colored penetrant. Penetrant contains a dye rhodamine and the solvent is ethanol. The composition of the solvent is further added kerosene, acetone in the following ratio %by volume:

- kerosene60-70
- acetone27-35
- ethanol3-5
- rhodamineimposed at the rate of 0.6-0.8 g/l

(Ed. mon. The USSR 1582095).

Disadvantages you perechislennih of penetrants for dye penetrant is content in their volatile composition and legnovalledaosta solvent, which limits their applicability for industrial testing. In addition, a well-known penetrants do not have a high level of sensitivity.

Also known penetrant, used to control the individual parts in power engineering, having the following composition, wt.%:

- rhodamine With or W0,98-0,99
- oil fraction "Sirvana 2"
as phosphor2,4-2,75
- butyl alcoholrest

(Patent RF № 2012870).

The drawback of this penetrant is the instability of control and low level of sensitivity, legaliteti composition.

For fluorescent-dye penetrant used anhydrous water-soluble liquid oil-based to water-soluble fluorescent dye and rhodamine With the following composition, wt.%

- ethyl alcohol30%
- kerosene50%
- rhodamine2 wt.%
- fluorescent dye No. 750.5-1 wt.%
- lumbrical other varieties1,5%
- monobutyl ether dietology is Olya 20%

(U.S. patent 3735131).

This penetrant contains expensive components (dyes), and the use of penetrant is not economically feasible.

To detect facing surface cracks during testing of products from non-metallic crystalline materials, such as models based on urea, used for casting in shell form, apply the colored penetrant for liquid penetrant inspection, having the following chemical composition, wt.%:

- organic dye0,5-0,7
- solvents:
- castor oil40-50
- ethyl alcoholrest

As the organic dye used rodann C.

(Ed. mon. The USSR № 1935461).

The disadvantage of penetrant is reduced penetration ability, lack of color defects in the visible color. In addition, this penetrant fire, belongs to the class of flammable liquids.

For the prototype accepted penetrant for color liquid penetrant inspection, having the following composition, wt.%:

Organic dye:

the mixture disasteradio red and
mediacoder.exe blue dyes3-6
- nonionic surfactant surfactant10-40
- solventrest

As the surfactant used neonol or sentenal.

As solvent

- a mixture of dibutylsebacate with butyl alcohol at a ratio of 2:1.

the mixture mediacoder.exe blue with disasterrisk red dye take in the ratio 1:(6-5). (Patent RF № 2238543).

The disadvantage of the penetrant is colored coloring, no image in the ultraviolet region of the spectrum and the lack of sensitivity that does not allow you to use it for parts inspection critical assignment.

The technical purpose of this invention is to provide a color penetrant, working both in the visible and UV spectral regions, increased penetration, low fire hazard, allowing to detect defects of the opening width of 0.5-1 μm in the ultraviolet and 5-7 µm in the visible region of the spectrum.

To achieve the technical objectives proposed penetrant for color liquid penetrant inspection, including organic dye, a nonionic surfactant and a solvent, characterized in that organic is about dye, a mixture of fluorescent xanthene dyes - dioxincontaining yellow-orange dye and diadinoxanthin blue-red dye and the solvent is a mixture of ethylene glycol with propilenglikolstearat in the following ratio, wt.%:

A mixture of xanthene dyes3-6
Nonionic surface - active substance (SAS)10-40
SolventRest

As the nonionic surfactants used neonol, sentenal.

The mixture dioxincontaining yellow-orange dye and diadinoxanthin blue-red dye charge / mass ratio of 1:2, and a mixture of ethylene glycol with propilenglikolstearat charge / mass ratio of 1:3.

This object is achieved in that during the development of the color of penetrant in the coloring basics used a mixture of xanthene dyes - dioxincontaining dye bright yellow-orange and diaminoanisole dye blue-red in a mixture of high temperature non-volatile solvents, creating in the presence of surfactants stable solution.

Due to the coloristic properties (color, brightness), xanthene dyes bright yellow in reflected light, due to the extremely bright fluorescence in daylight, krassi the spruce gives a yellow-orange coloration of the penetrant. However, due to poor solubility and low concentration of dye in these solvents cannot create a sufficient concentration of dye in these solvents, and therefore, the brightness of color of the trace of the defect under UV (control) - weak. To strengthen the color of penetrant in the solution dioxincontaining bright yellow-orange dye was introduced diaminoanisole blue-red dye with strong fluorescence in the visible and UV region of the spectrum. The selection of the ratio of the two dyes in the composition of penetrant can significantly increase the brightness of color of penetrant in the presence of surfactants.

To create a color of penetrant necessary to adjust the composition of the dye, solvent, and surfactant, as for most dyes coloristic properties significantly change depending on the solvent, and the influence of the latter it is impossible to predict. Nonionic surfactant is added to the used solvent to improve the solubility of the dye. It should be borne in mind that the presence of surfactants can have undesirable effects on the spectral characteristics of the dyes. Offered as surfactants sentenal or neonol improve the solubility of the penetrant and not worsen the coloristic properties of the dye.

From the point of view of liquid penetrant inspection colored penetrant - defectos epicheskii material, representing a brightly colored liquid (dye solution), who are able to moisten the material and to penetrate into the defects in the action of capillary forces. For this purpose penetrant must be sufficiently high surface tension and wetting angle when spreading close to zero.

Organic solvents for the color of penetrant must meet the following basic requirements:

- Possess a high boiling point (boiling temperature must be greater than 200°).

- Low volatility.

- Relatively low toxicity.

- Well to dissolve the dyes to impart color contrast.

To have a viscosity 1-3 CPS (at 20°C.

Surface tension ∂±DN 20/see

The last two parameters determine the necessary penetrating properties of penetrant.

Given the above requirement, as a solvent for the penetrant was selected mixture of ethylene glycol and propilenglikolstearat mass ratio of 1:3. Wetting angle 30±1.

Ethylene glycol (GOST 10164-75) is a colorless liquid, soluble in water and alcohols having a boiling point of 200°C.

Propilenglikolstearat (TU 6-09-11-2035-95) - high-temperature solvent, a colorless transparent liquid, odorless, insoluble in water, has temperaturwerte 241° C. Mass fraction of the main substances (4H6About3) not less than 99,5%, the refractive index 1,4205-1,4225, flash 132°s Propilenglikolstearat - powered product. Xanthene dyes:

- deoxycytidine dyes bright yellow-orange colors are exceptionally bright fluorescence in daylight. Trudnorastvorimy in water, preferably in alcohol.

- diaminoanisole dyes blue-red color have a strong fluorescence in reflected light.

We have investigated surfactants of a range of ethoxylated alcohols fraction 12-14, related to biologically mild surfactants. In the result as the optimal compounds were selected neonol and sentenal.

When the surfactant mixture of ethylene glycol with propilenglikolstearat has a surface tension of 30 DM/cm; wetting angle 10±3°; flash point not less than 120°C.

Examples of implementation

In laboratory conditions it was taken 4 metal sample with artificial defects corresponding to the first class of sensitivity according to GOST 18442-80 where:

1ththe sample with defects and opening width of 0.5 μm, a depth of 10 μm:

2ththe sample with defects and opening width of 1.0 μm, a depth of 20 microns;

3rdthe sample with the defect opening width of 1.5 μm, a depth of 30 microns;

4thbrazes with defects opening width of 2.5 μm, depth of 50 ám.

Specimens with artificial defects with opening width 2; 3; 5; 7; 8; 9; 10, the depth of 30-60 microns.

Fragments of parts with surface finish Rz 20∨ with natural defects, as well as samples of ceramics (percent porosity <30%) with artificial defects, which caused the proposed penetrant, withstood, the excess of penetrant deleted cotton cloth and put the developer PR-1 (TU-6-09-11-3163-95). As part of penetrant as dioxincontaining yellow-orange dye took fluorescein (TU 09-26-51-87), as diadinoxanthin dye blue and red used WITH rhodamine (TU 6-14-1088-84). Controlled surface viewed in visible and UV light; blue-red trail of a defect on a white background surface in the visible spectrum and in the UV light for the presence of defect location on the yellow-orange trail.

Formulations of penetrant and penetrant prototype and the testing results are shown in table.

The testing results show that the developed color for liquid penetrant flaw detection has low volatility and low Flammability (flash point greater than 120°C)the very high sensitivity ensures the reproducibility of the control at the 99% with the identification of the minimum defect opening width of 0.5-1 μm, in the light and 5-7 µm in the visible spectrum, improves the reliability and stability control products and expands the scope of it in terms of repair and maintenance.

The composition of the proposed and known color penetrant, declared and used as a prototype, and the results of their tests.
Composition, wt.%offerthe placeholder
12345
Dye,
A mixture of xanthene dyes:
Dioxincontaining yellow-orange121,32-
dye and diadinoxanthin blue-red dye242,64-
The mixture disasteradio red----5
dye 5S TU 6-3605800-145992-90 and----1
mediacoder.exe blue dye antrahinonovye THE 09-55-94-88
PAV
Neonol (AF 9-12) THE 38-103625-871020-25-
Sintana THE 6-14-577-87--40-40
Solvent:
Dibutylsebacate GOST 8728-88----35,4
Butyl alcohol GOST 6006-88----17,6
The glycol GOST 10164-75a 21.7518,514,017,25-
Propylene glycol carbonate THAT 6-09-11-2055-8765,2555,542,1won with 51.75-
Under UV light level sensitivity0,5-10,5-10,5-10,5-1-
The size of the mini is social detected defect mcm
The reproducibility of control %999999990
In visible light.5-75-75-75-71-2
The level of sensitivity. The minimum size of the detected defect mcm
The reproducibility of control %9999999999
The removal of the developer after the controlWater is easily removed at a temperature of 20-30°Water is easily washed off with 20-30°
Flash t°12312312312393

1. Penetrant for color liquid penetrant inspection, including organic dye, a nonionic surfactant and a solvent, wherein the organic dye is a mixture of fluorescent xanthene dyes - dioxincontaining yellow-orange dye and diadinoxanthin blue-red edge is Italia, and as the solvent is a mixture of ethylene glycol with propilenglikolstearat in the following ratio, wt.%:

A mixture of xanthene dyes 3-6

Nonionic surface-active agent (surfactant) 10-40

The solvent Else

2. Penetrant for color liquid penetrant testing according to claim 1, characterized in that as the nonionic surfactants used neonol, sentenal.

3. Penetrant for color liquid penetrant testing according to claim 1, characterized in that the mixture dioxincontaining yellow-orange dye and diadinoxanthin blue-red dye charge / mass ratio of 1:2.

4. Penetrant for color liquid penetrant testing according to claim 1, characterized in that a mixture of ethylene glycol with propilenglikolstearat charge / mass ratio of 1:3.



 

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