الفهرس 
Chemicals and materialsOnly 14 pages are availabe for public view
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Abstract
Corrosion is the destructive attack of a material by reaction with its environment. The serious consequences of the corrosion process have become a
problem of worldwide significance. In addition to our everyday encounters with this form of degradation,corrosion causes plant shutdowns, waste of valuable resources,loss or contamination of product, reduction in efficiency, costly maintenance, and
expensive overdesign. It can also jeopardize safety and inhibit technological progress. A corrosion inhibitor is a chemical compound that, when added to a liquid or gas, decreases the corrosion rate of a material, typically a metal or an alloy.This work discusses the corrosion of copper in 2 M HNO3. This work contains three basic chapter Chapter one: “INTRODUCTION” This chapter discusses corrosion definition, corrosion consequences, cost of
corrosion, classification of corrosion,forms of corrosion, metals exposed to corrosion, types of inhibitors, plant extract as corrosion inhibitors, corrosion monitoring techniques, material characterization techniques applied on copper and
literature survey of copper corrosion.Chapter two: “EXPERIMENTAL AND TECHNIQUES”It includes the copper composition, preparation of nitric acid and plant extracts, composition of these extracts, experimental procedures used to measure the corrosion rate such as weight loss, potentiodynamic polarization, EIS, EFM and surface examination method as AFM and FTIR procedures. Chapter three: “RESULTS AND DISCUSSION” Results and discussion chapter deals with the results obtained and their discussion and this chapter is divided into five sections:
Section (A) Evaluation of the inhibitor efficiency by weight loss method in the presence and absence of the used plant extract in 2M HNO3 at 25 ± 10 C. This revealed that the inhibitor efficiency increases with the concentration. This method used to find out the effect of temperature on the inhibition of corrosion copper in a solution of nitric acid at four different temperatures in the rang
25 - 45°C, and found that the corrosion rate increases with temperature with the lack of efficiency of inhibition which shows that inhibition occurs through physical adsorption of inhibitors and follow Langmuir isotherm and after drawing a relationship between ϴ/1-ϴ and concentration of extract (C).