Aluminum bronzes are copper base alloys with high strength that aluminum existence in this alloyes strengthens them. By increasing the aluminum percentage, alloys strength increase too. Alloy elements such as Ni, Mn, Fe and Si, are added to produce the different types of this alloy with various properties of strength, ductility, corrosion resistance and magnetic penetrability. These alloys have suitable wear resistance, cast ability in different casting methods and good weld ability. These alloys show high corrosion resistance in sea, chloride and weak acid environments. Application of these alloys is much extended and includes propellers, valves, wear rings. In this study, different percentage of alloy elements, Ni and Mn, were added similarly of 0-15%. To evaluate the effects of these additions, mechanical and corrosion properties were investigated and the best percentage was determined. Micro structure of casted alloys was studied by a scanning electron microscope (SEM) and EDS analysis was carried out to phases identify. To corrosion properties evaluation, polarization test, immersion test and cavitation erosion test were done. Hardness and pin on disc wear tests were carried out to investigate the mechanical and tribological properties. The results showed the alloys with 10% Ni and Mn, have best corrosion resistance, wear resistance and mechanical properties. Addition of Ni and Mn above 10%, causes brittle phases that penetrate in transgranular and border grains and makes them weak. Cavitation corrosion test results showed that by alloys elements above 4%, cavitation resistance in 6 hr periods is very good. Keywords: aluminum Bronze, Alloying, Heat Treatment, Cavitation Corrosion, Sea applications.
