Study Corrosion Resistance & Wear Sliding  
 in alloy (Al-Fe-V-Si ) and ( Al-Fe-V-Si- Zr ) In Different Medium.     
   
  Abstract :
         This study deals with the corrosion behavior and wear sliding of two alloys (Al-Fe-V-Si) and ( Al-Fe-V-Si-Zr)
                The corrosion tests were done by (immersion specimens in different solutions , to inustrate the effect of temperature on the corrosion behavior , sliding wear test , microscopic examination) .The result of simple  immersion test in different solutions (distill water , natural water, salt solution (3 % NaCl wt%), Acidic solution (3% HCl vol%) and (3% NaOH vol%) at room temperature showed different corrosion behavior for the used alloy under the same condition.The alloy (Al-Fe-V-Si-Zr) showed significant superiority in the corrosion resistance than alloy (Al-Fe-V-Si ) in the all corrosion tests , except the testes in salt solution ;  which firstly showed that the alloy (Al-Fe-V-Si) superiority on the alloy (Al-Fe-V-Si-Zr) ; then the test showed superiority alloy  (Al-Fe-V-Si-Zr) . The result appears that the alkaline medium is more effect on the alloys than the other types of medium .  
          The results of effect of temperature on the corrosion behavior of the alloys showed that  the rate of corrosion increasing with increase temperature of the solution but by rates depended on the alloy used and the type of solution ; in the water medium (distill water , natural water) , the corrosion rate of the alloy (Al-Fe-V-Si) was raised (2);(1.6) time respectively when increased the temperature of the medium from (40 C°) to (80 C°) ; the corrosion of (Al-Fe-V-Si-Zr) alloy is increased (4),(5) time respectively when the temperature was in creased in the same temperature and medium .  
              But in the salt medium the corrosion of the alloy (Al-Fe-V-Si) is increased (1) time and alloy (Al-Fe-V-Si-Zr) increased (1.75) time ; in the acid medium the corrosion increased ( 1.2) time and (1.4) time for (Al-Fe-V-Si ) alloy and ( Al-Fe-V-Si-Zr ) alloy respectively ; also the corrosion of (Al-Fe-V-Si) alloy increased (1.5) time and (1.67) time of (Al-Fe-V-Si-Zr) alloy when the temperature of acid and alkaline medium increase from (40 C°) to (80 C°) .The result of sliding wear test showed significant superiority of alloy (Al-Fe-V-Si-Zr ) on the  alloy  (Al-Fe-V-Si).