Corrosion and Wear Resistance of Zn-Al Alloys with Columnar, Equiaxed and Columnar-to-Equiaxed Transition Structures

A. E. ARES; L.M. GASSA; M. R. ROSENBERGER; C. E. SCHVEZOV

Río de Janeiro

Conferencia; 11th INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS (ICAM 2009) / VIII ENCONTRO SBPMat; 2009

International Union of Materials Research Society (IUMRS)

The columnar to equiaxed transition (CET) has been examined in different wrought and casting alloys for many years and the metallurgical significance of CET has been treated in several articles. Experimental observations in the literature have focused on thermal parameters like cooling rate, velocity of the liquidus and solidus fronts, local solidification time, temperature gradients and recalescence. The objective of the present research consist on studying the influence of the type of structure (columnar, equiaxial or the CET) in Zn-Al alloys (Zn-1%Al to Zn-4wt%Al, weight percent) on the corrosion and wear resistance. The results show that the CET zone and the equiaxed structures presented a better corrosion and wear resistance than the columnar zone.