Mechanical Engineering

بررسی جوش پذیری، تغییرات خواص و ریزساختار تیوب های HP پس از سرویس دهی پنج ساله در کوره های پیرولیز صنایع پتروشیمی صادق برجعلی - مجتمع پتروشیمی شازند (اراک) سعیدرضا اله کرم - هیئت علمی دانشکده متالوژی و مواد دانشگاه تهران مصطفی خانمحمدی - مجتمع پتروشیمی شازند (اراک) محمد منتظری - مجتمع پتروشیمی شازند (اراک) چکیده مقاله: ف ولادهای HP تولید شده به روش ریخته گیری گریز از مرکز، برای کوره های پیرولیز در صنایع پتروشیمی، در شرایط تازه ریخته گری شده، داکتالیتی و Mechanical Engineering...

Mechanical Engineering...

Mechanical Engineering...

Mechanical Engineering...

Mechanical Engineering...

Mechanical Engineering...

 Role of anodic passive potential on the electrochemical response of pure Tantalum in 0.1 M H2SO4 solution Arash Fattah-alhosseini1*, Saeed Vafaeian1, Ali Reza Ansari1, Mostafa Khanmohammadi21 Department of Materials Engineering, Bu-Ali Sina University, Hamedan 65178-38695, Iran2 Department of Welding & Non-destructive Testing Inspection, Shazand Petrochemical Company, Arak,   * Corresponding Author, Tel.: 988138292505; Fax: 98 813 8257400E-Mail: [email protected] this work, the role of anodic passive potential on the passive and electrochemical response of pure Ta in 0.1 M H2SO4 solution was studied. Electrochemical impedance spectroscopy (EIS) plots showed that corrosion resistance of the passive film on the pure Ta increased with the increasing of anodic passive potential. In addition, the semiconductive behavior of the passive films formed on pure Ta in 0.1 M H2SO4 solution is evaluated by employing Mott–Schottky (M–S) analysis. Although, semiconducting response of pure Ta in 0.1 M H2SO4 solution remains the same as n-type, anodic passive potential significantly affect the levels of donor concentrations. Indeed, M–S analysis revealed that less donor densities in Mechanical Engineering...ادامه مطلب

Mechanical Engineering...

Mechanical Engineering...

Mechanical Engineering...