SU1627930A1 - Method for determination of adhesion strength - Google Patents

Abstract

The invention relates to a testing technique, in particular, to methods for determining the adhesive shear strength during electrolysis. The aim of the invention is to improve the accuracy of determining the adhesion strength of a metal coating and a layer of non-conducting particles during electrolysis on shear. Before applying a layer of particles to the coating, an electrolyte layer is applied, the adhesion between the coating and non-conducting particles is created by applying to them an force exceeding the pressure force necessary to displace the electrolyte from the surface of the coating. The adhesive strength is judged by the magnitude of the onset of shear on non-conducting particles. 2 Il.

Description

The invention relates to testing equipment, in particular to methods for determining adhesive other

shear during electrolysis. The aim of the invention is to improve the accuracy of determining the adhesive strength of the metal coating and the layer of non-conductive particles during shear electrolysis. Before applying a layer of particles, an electrolyte layer is applied to the coating, the adhesion between the coating and non-conductive particles is created by applying to them a force that exceeds the pressure force required to displace the electrolyte from the coating surface. Adhesion strength is judged by the magnitude of the start of shear of non-conductive particles. 2 ill.

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contact with the axis of the rod 13. After installing the sleeve 6 by means of a nut 12 and squad 7, the non-conductive particles 26 are subjected to pressure with a force exceeding the pressure required to displace the electrolyte layer in the zone of contact of non-conductive particles with a metal coating 5. The absence of an electrolyte layer in this zone is determined by means of a probe or by measuring the diffraction of a laser beam in the contact zone of the end surface of the sleeve with the sample surface to be coated, After installing the sleeve 6 and pressing the non-conductive particles 26 to the cylinder cal surfaces and so in lux and 2.2 6 fed indicator move and set it to zero,

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Before starting popcchn I7 should find ·:! in contact with the cylindrical surface of the sleeve 6 In this case, there should be no shear shift, When the shear state measured by the indicator 22 of the displacement ps of the well spring 10 determines the shear force () of the non-conductive parts 26 relative to the coating surface. After that it’s not 40

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ω o formula of the invention

The method for determining the adhesive strength is that a layer of particles is applied to the coating to which a load is applied, and they give a parameter characterizing the adhesive strength. particles to the coating, on the face of. that, in order to improve the accuracy of determining the adhesive strength of methane-g ·. · a certain coating and layer of non-conductive particles during electrolysis on

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Claims (1)

shear, before applying a layer of particles, a layer of electrolyte is applied to the coating, adhesion between the coating and non-conducting particles is created by applying to them a force that exceeds the pressure force required to displace the electrolyte! with the coating, the nails of the coating, and l as the parameter of adhesive strength determines the magnitude of the onset of shear of non-pigmented particles. 7 ** fi έ. 1.