الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
There is an increasing concern about the toxicity, biodegradability, and bioaccumulation of oil field chemicals corrosion inhibitors discharged into the environment. Corrosion inhibitors in the aqueous phase are discharged into the ocean and transform to an environmental hazard to marine life.This study focuses on testing the performance of new natural and non-toxic substances as metal green corrosion inhibitors in addition to being not expensive instead of using chemical inhibitors which are expensive and toxic.The green inhibitors used are fig leaves extract (FLE) and olive leaves extract (OLE), they are cultivated and grown in Egypt and many other countries. These inhibitors are tested on two widely used metals in industry: copper which is frequently used in heat exchangers tubing and mild steel which is frequently used in crude oil piping. The corrosive media used are hydrochloric acid (HCL) and Sulfuric acid (H2SO4).The following parameters had been studied:1- Time 2- Concentration of inhibitor3- Concentration of acid 4- Type of inhibitor 5- Type of acid 6- Type of metal The maximum obtained corrosion inhibition efficiencies for copper are 90% and 88% using 0.75 g/L of FLE and OLE respectively, in 1 M of H2SO4. The maximum obtained corrosion inhibition efficiencies for mild steel are 82% and 71.5% using 0.25 g/L of FLE and OLE respectively, in 0.5 M HCl.