penetrant

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penetrant

[′pen·ə·trənt]
(invertebrate zoology)
A large barbed nematocyst that pierces the body of the prey and injects a paralyzing agent.
(materials)
A liquid with low surface tension, usually containing a dye or fluorescent chemical; when flowed over a metal surface, it is used to determine the existence and extent of cracks and other discontinuities.
References in periodicals archive ?
But before you apply heat, wash off all the rust penetrant (most penetrants are flammable).
Some physical properties of solvents used as penetrants are shown in Table 1.
Each volume covers a specific NDT method, as the new Volume 2 covers liquid penetrants.
Unlike elastomerics, penetrants do not provide a surface coating.
By incorporating these innovative adjuvants "in-can", pesticide formulators may now offer their customers all the advantages of silicone superspreaders and penetrants.
Water-washable penetrants require a water spray to remove the excess surface penetrant.
the molecular diameters of the penetrants determined from Fisher models.
the densities of the elastomer and the penetrants were assumed to be equal; (2) All rubbers contained large proportions of fillers that may influence the swelling properties; (3) The precision in the molar mass assessment of the penetrants is of the order of 10% and particularly the higher molar mass liquids have broader molar mass distributions.
Qualitatively, the methods of evaluation include visual bubble examination, visual comparison and dye penetrant inspection.
These curves are reminiscent of two-stage sorption behavior that has been noted for swelling penetrants in glassy polymers (9-12), in which the initial stage is controlled by diffusion, and the latter stage is controlled by a slower process involving polymer relaxation.
Tenders are invited for Supply of Non Destructive Testing Penetrants, Group I Conforming To Is 12889-1989 With Non-Aqueous Wet Developer.