Estudo da redução da camada de revestimento de Galvalume®

Abstract

The study of reducing the Galvalume [trade mark] coating layer was the objective of this work in order to increase the share of the nationally produced product, through chemical and physical tests that showed the performance of the material with a reduced coating layer. In addition to understanding which parameters can be changed to obtain a product with a thinner coating and has a satisfactory corrosion resistance capacity for the desired application. The study of the microstructure along with the salt spray test Were the main tool to correlate the behavior performed by the product produced with a reduced coating layer thickness specification. The results proved that the main factor in the product's durability is its microstructural formation combined with thickness. Lower coating layer thicknesses tend to present precarious microstructural formation, however, optimized layer formation at thicknesses close to 20 μm ends up mitigating this problem. This way, the possibility of resuming plots that use imported material with reduced coating thickness can be produced and achieved nationally. However, the performance of the material with a reduced coating layer is significantly inferior compared to the product produced with a standard coating layer.