Abstract

O., Yraima Rico; CARRASQUERO, Edwuin  and  MINCHALA, Jaime. Evaluación de propiedades mecánicas en recubrimientos galvanizados por doble inmersión en caliente sobre acero al carbono. Ingenius [online]. 2019, n.22, pp.80-89. ISSN 1390-860X.

Few is known about the operational conditions, the microstructure and properties of the coatings manufactured by double-dip hot. The objective of this work is to evaluate mechanical properties of Zn / Zn-5%Al coatings applied by the double-dip hot technique, varying the immersion times in liquid baths. For the evaluation Vickers microhardness profiles and bending tests were made. The microhardness profiles for different immersion times show similarities, showing great heterogeneity due to the microstructural characteristics. It is observed that increasing the immersion time decreases the critical angle and the immersion time does not significantly influence the density of confined and unconfined cracks. It is concluded that the ductility of the coatings is influenced by the total thickness of the same, and possibly by the thickness of the different areas and residual stresses, the samples being coated with a 60 s immersion time, which present better behavior the bending test.

Keywords : Microcrack; double-dip; galvanized coatings.

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