STUDIES AND INVESTIGATIONS REFERRING TO THE ADHERENCE OF THE METALIZED LAYER AT THE GROUND-UNDERGROUND INTERFACE

Ionatan-Teodor ZELEA, Gheorghe ACHIMAŞ, Daniel LAZE

Abstract


The paper presents theoretical and experimental investigations on the shear test performed in order to assess the adherence of the metallic or ceramic layer deposited on a metallic ground, in the case of pulverized metallic coatings. The test consists in applying a compression load along the specimen axis until the deposited layer loses its adherence due to shear stresses (STAS 1684/4-83). The coating regime used when preparing the specimen must be similar to the one used when performing the pulverizing coating of crank shafts. Three channels are machined together with an end of the specimen in order to obtain three ring zones containing deposited material. The test is performed on a class 1 universal tension/compression testing machine (STAS 1510-80).

Key words: Adherence, metallic coatings, retrofitting, maintenance, shear test


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References


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* * * STAS 11684/4 – 83. Acoperiri termice prin pulverizare.


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