The effect of (Ag, Ce)‎ addition on corrosion resistance of (Al-Si)‎ alloy

Abstract EN

Aluminum casting alloys with silicon as the major alloying elements are the most important commercial casting alloys because of their superior casting characteristics and as it is well known that (Al-Si) alloys, which are widely applied in the aerospace and automotive industries.

This research aims to study the effect of silver and cerium (2.5% Ag, 2% Ce) elements added to (Al-Si) alloy.

In this research was calculated Vickers microhardness and corrosion resistance by electrochemical method to master alloy before and after the addition of silver and cerium.

The results showed that the addition of the silver element led to increase microhardness, decrease corrosion resistance, and either addition of cerium led to decrease microhardness, increase corrosion resistance and addition of elemental silver and cerium together led to increase microhardness, decrease corrosion resistance of (Al-Si) alloy.

The results shown that the best corrosion resistance was in (C) alloy (Al- 6.37% Si- 2% Ce) while (B) (Al- 6.34% Si- 2.5% Ag) has better microhardness.