Study of Corrosion Penetration Rate on composite materials EN AC-43100 (AlSi10Mg (b)) + SiC*

Corrosion Penetration Rate (CPR) is defined in three ways: (1) the speed at which any metal in a specific environment deteriorates due to a chemical reaction in the metal when it is exposed to a corrosive environment, (2) the amount of corrosion lost per year in thickness, (3) the speed at which corrosion spreads to the inner portions of a material. The purpose of this research is to calculate CPR of Aluminum matrix composite materials (AlSi10Mg (b)) with Silicon carbide (SiC*) reinforcement with the variation of matrix composite percentage. A wet corrosion test was conducted by dipping AlSi10Mg(b) and AlSi10Mg(b)+SiC* in the solution of HCl acid, NaOH, NaCl. The wet corrosion tests were also being done in the different pH (1,3,5,7,9,11, and 13). It was found that the highest corrosion penetration rate occured when the specimen dipped on HCl solution when the pH is 1. We also observed that the addition of SiC* could reduce the corrosion rate of materials. Finally, this study showed that composite material, AC-43100 (AlSi10Mg (b)) 85% + 15% SiC*, it is the best material in resist of corrosion attack, it has smallest CPR value that is below the standard of corrosion < 0.5 mm/yr.