الفهرس 
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Abstract
The corrosion problem is a great problem, which faced the world from the last years until now, we cannot hide this problem from our life but we can reduce “inhibit” it in the metals and alloys by several methods as the environment need. This work discusses the corrosion of Al-Si alloy in 0.1M HCl. The electrochemical measurements and non-electrochemical calculations support the assumption that corrosion inhibition primarily takes place through adsorption of the inhibitors on Al-Si alloy surface. Agreement among these different independent techniques indicates the validity of the obtained results. All previous results support that pharmaceutical compounds were actually inhibits the corrosion of Al-Si in 0.1M HCl acid solutions. The corrosion inhibition is due to their physical adsorption and formation of protective film of the adsorbate on the metal surface