Igaza van Erzsinek. Van hatolás, de az ÁTHATOLÁS = permeáció.
Penetráció = átszivárgás. Az angol definíció is mutatja:
https://ohsonline.com/Articles/2008/07/Permeation-vs-Penetra...Penetration TestingPenetration, as it relates to chemical protective garments, refers to the
passage of chemicals through clothing material without changing its properties. Penetration is achieved when a chemical finds and
passes through pores and imperfections in the clothing material, closures, seams, and interfaces. Penetration testing, therefore, is a defect test—an evaluation of how (or whether), a substance flows through openings in a material.
Permeation TestingAs opposed to penetration testing, permeation testing evaluates how chemicals move through protective garments without passing through voids or imperfections. Permeation testing looks at how a given test chemical is absorbed into the contact surface of a garment, the
diffusion of the chemical through the material, and desorption of the chemical from the opposite side. Permeation can occur in the absence of penetration.