مشخصات پژوهش

عنوان	A Study on Passive and Electrochemical Response of Pure Nickel in Borate Buffer Solutions: Effect of Cold Deformation
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	cold deformation, EIS, microhardness, passive layer, pure nickel, XRD
چکیده	In the present work, influences of the cold deformation on electrochemical and passive response of pure nickel in three solutions with adjusted pH values of 8.5, 9.0, and 9.5 at 298 ± 1 K (25 ± 1 C) were investigated. A cold deformation process was applied by means of cold rolling. Implementation of the cold deformation process resulted in samples having a finer microstructure. Also, the cold work and grain refinement led to increased hardness. In addition, open-circuit potential and potentiodynamic polarization tests were performed and results showed that corrosion current density was reduced by applying the cold deformation. Moreover, the results of the electrochemical impedance spectroscopy and Mott–Schottky analyses indicated higher corrosion resistance of pure nickel after cold deformation. This behavior is attributed to the growth of much thicker, with less point defects, passive layer on the surface of colddeformed samples.
پژوهشگران	آرش فتاح الحسینی (نفر اول)، مجید ناصری (نفر دوم)، سیدامید گشتی (نفر سوم)، سعید وفاییان (نفر چهارم)، محسن کشاورز خوراسگانی (نفر پنجم)