الفهرس | Only 14 pages are availabe for public view |
Abstract Thethesisconsists of three chapters. Chapter I is the introduction, Chapter Il represents theexperimentaltechniques and Chapter III contains the experimental results and their discussion. Chapter I: In this chapter, an introduction is given which deals, with the following fields of interest: Applicationof nickel in industry, nickel alloys and nickel corrosion, the potential-pH diagram of nickel, anodic behavior of nickel, potential of zero charge, corrosion inhibitors, classification of inhibitors, passivity, adsorption, factors affecting the adsorptionprocess, adsorption isotherms, the kineticthermodynamic model of corrosion inhibition,literature survey on corrosion inhibition of nickfl and the aim of the work. Chapter 11: The main contents of this chapter were the experimental techniques used in the present investigation. The potentiodynamic polarization technique and electrochemicalimpedance spectroscopy (EIS) were used. In addition, to the detailed descriptionof the electrochemical cell, the three electrodes which are saturated calomel electrode(SCE) as reference electrode, platinum as auxilIary electrode and the working electrodeare described. The preparation of the test solutions in absence and presence of theinhibitors (methyl triphenyl phosphonium bromide and vinyl triphenyl phosphonium bromide). Chapter Ill: In this chapter ,the experimental results were discussed in four parts: Part I.1: Represents the effect of methyl triphenyl phosphonium bromide (MTPB) on the corrosion behavior of nickel in aqueous in 0.5 M Na2S04 solution contain 0.1 M aCIat 30 ·C in presence of different concentrations of MTPB using potentiodynamic polarizationand electrochemical impedance spectroscopy (EIS) techniques. Thepotentiodynamic polarization curves for nickel in aqueous 0.5 M Na2S04 solution containing0.1 M NaCl in the presence of different concentrations of MTPB showed that this compound act as mixed type inhibitor and its addition caused. |