Formula for dye penetrate solution

Representative dye compositions of the above type are marketed as Automate Red, e. Suitable nonionic surfactant vehicles for the dye penetrant compositions of the invention include oxyalkylated aliphatic alcohols, alkoxylated alkyl phenols and alkyl aryl polyether alcohols, and mixtures thereof. Application of such dye penetrant compositions to a part surface for detection of cracks therein results in efficiently and quickly obtaining brilliant red visible light indications of cracks in the part surface, generally superior in brilliance and sensitivity to prior art commercial red dye penetrants containing solid dyes in solution. Various other "Plurafac" grades which are marketed and are believed to be generally within the above-described classes of oxyalkylated alcohol surfactants are those designated RA, A, A, B, B and D Sorption of Dyes and Acids in Wool Fibers. A further object is to provide procedure for dye penetrant inspection of objects, utilizing such dye penetrant composition. Since the dyes or dye compositions are in single phase liquid form, the dyes cannot crystallize or precipitate in the dye penetrant composition and these single phase liquid azo dyes produce highly stable solutions which provide brilliant indications in the dye penetrant inspection process. The amount of viscosity depressant in the final composition may equal that of the azo dye, but it is preferred that the viscosity depressant be present in a minor amount, e. Kylie. Age: 20. Clean and beautiful sex parther Gloria. Age: 27. I speak Spanish and English, sorry no German yet

Dye penetrant inspection

When employed, a dry powder or non-aqueous volatile solvent base developer composition can be utilized. The dye penetrant composition as defined in claim 23, said nonionic surfactant being an oxyalkylated aliphatic alcohol or mixtures thereof, formed of an aliphatic primary or secondary alcohol carrying ethoxy or propoxy groups, or mixtures thereof, employing about 1 part of said azo dye composition to about 4 to about 20 parts of said surfactant by volume, said dye penetrant composition being substantially free of insolubles. One group of nonionic carriers within the class of materials defined immediately above is a cogeneric mixture of compounds represented by the formula:. Such nonionic surfactant must be capable of penetrating minute cracks and other defects in the surface of an object to carry a film of dye penetrant composition into such cracks and other surface defects, and remain entrapped in such defects so as to reveal such cracks and other defects due to the dye contained in the composition. The term "cogeneric mixture" as employed herein, designates a series of closely related homologues obtained by condensing a plurality of oxide units, with an alcohol or a mixture thereof. The solvent also has low toxicity including a very low level of skin irritants and a very low concentraton, limited to a few ppm, of trace impurities such as sulfur, chlorine, acids, and carbonyls. In preparing the dye penetrant composition employed according to the invention, the single phase liquid dye composition, e. A representative preferred isoparaffinic solvent particularly having the above chemical and physical characteristics is the solvent marketed as "Isopar M" by Exxon. The linear alkyl hydrophobic portion of the above defined surfactant is a mixture of C 11 to C 15 linear alkyl chains, and can be derived from a mixture of C 11 to C 15 aliphatic secondary alcohols, for example the secondary undecyl, dodecyl, tridecyl, tetradecyl and pentadecyl alcohols. Also, alkyl aryl polyether alcohols can be employed such as the material marketed as "Triton X," which is isooctyl phenyl polyethoxy ethanol. The products thus produced possess random distribution of oxyethylene and oxypropylene groups. Results obtained were similar to those obtained in Example 1, except that the brilliance and sensitivity and concentration of cracks revealed on that side of the panel treated with the dye penetrant formulation 2 were not as great as in the case of formulation 1 of Example 1, but were still equal to or superior in these respects to the side of the panel treated with the standard commercial red-visible penetrant. Since red dye penetrants generally have a greater dye content than fluorescent dye penetrants, a serious problem with red penetrants is precipitation of the dye and also deposition of insoluble impurities from the dye in the carrier or solvent. The above nonionic surfactants employed as carrier or vehicle for the dye of the penetrant solution according to the invention, are prepared by condensing an alcohol or mixture of alcohols, as described above, with a mixture of ethylene oxide and propylene oxide, in the presence of an alkaline catalyst, such as potassium hydroxide.

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Dye Penetrate Solution (% Toluidine Blue/% Triton), ml

The following are examples of practice of the invention. Where it is desired to employ a relatively insoluble nonionic surfactant in the dye penetrant composition, such a Tergitol S-3 noted above, the post emulsifiable dye penetrant inspection method of my U. A method for detecting cracks and other defects in the surface of an object which comprises applying to said surface a liquid dye penetrant composition comprising a nonionic surfactant, and a liquid azo dye composition which is soluble or miscible in said surfactant, said dye composition consisting essentially of an azo dye containing C 5 -C 12 alkyl beta naphthols, or mixtures thereof, said dye composition being a single-phase liquid, removing excess dye penetrant composition from said cracks and defects in said surface, and viewing the surface of said object under lighting conditions to obtain colored traces from the dye in said cracks and other defects. The postemulsifiable dye penetrant formulations 3, 4 and 5 above can be employed in conjunction with the water reducible or removeable emulsifier formulation No. More specifically, such azo dyes contain heptyl-beta-naphthols. EXAMPLE 3 Tests on aluminum panels containing microcracks were carried out employing procedure similar to that employed in Example 1, utilizing dye penetrant formulation 2 above on one-half of the surface of the test panel and utilizing the standard commercial red-visible dye penetrant on the other half of the panel. Both halves of the test panel were than covered with the wet nonaqueous developer of Example 1 above and allowed to dwell thereon for a period of about 2 minutes, to form dry developer coatings.

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