Search In this Thesis
   Search In this Thesis  
العنوان
Electro chemical behaviour of some and nickel alloys in aqueous media /
المؤلف
Mohamed, Metwally Abd Allah.
هيئة الاعداد
باحث / metwally abd alla mohamedر
مشرف / a.a.abdel el_fattah
مناقش / m.a.mousa
مناقش / a.m.mabrouk
الموضوع
Nickel alloys.
تاريخ النشر
1991.
عدد الصفحات
100 p. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الكيمياء
تاريخ الإجازة
1/1/1991
مكان الإجازة
جامعة بنها - كلية العلوم - كمياء
الفهرس
Only 14 pages are availabe for public view

from 307

from 307

Abstract

(1)The introduction included a literature survey of the different theories of corrosion and corrosion inhibition. The electrochemical behaviour of steel and nickel alloys in aqueous solutions (acidic, alkaline and neutral) was given with particular emphasis on the effect of aggressive as well as inhibitive anions. (2)The anodic and cathodic Tafel lines were constructed for Ni, Inconel 600, Incoloy 800 and 316 stainless steel in deaerated HNO3 solutions. This was made to elucidate the effect of acid concentration on the kinetic parameters of the dissolution of the diffe-rent electrode samples studied. a- Increase of acid concentration (decrease of pH) was accompanied by :
1 - A shift of the corrosion potential towards more negative values and increase of the corrosion rates, i corr. 2 An increase of the exchange current density io (A/Cm2) of h.e.r. 3 Change of cathodic Tafel slope, bc, (mV. S.C.E.). 4 - An increase of the anodic dissolution current density (ia, A/Cm2) according to : is = Ka [OH- VI ex p.