سال انتشار: ۱۳۸۷

محل انتشار: دومین کنگره بین المللی علوم و فناوری نانو

تعداد صفحات: ۲

نویسنده(ها):

Faryad Bigdeli – School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran,
Saeed Reza Allahkaram –

چکیده:

Electroless nickel (EN) coatings have been widely used in the chemical, mechanical and electronic industries because of their wear and abrasion resistance and corrosion resistance. Co-deposition of solid particles into coatings can further improve certain properties, thus enhance their performance. EN–SiC coatings are recognized for their hardness and wear resistance and are considered as a replacement for hard chromium in the aerospace industry [1,2].Hard particle-containing deposits (NiP/X, X=SiC, WC, Al2O3, Si3N4…) have been developed when the main requirement for the composite coating is wear resistance [1]. Among these coatings, the combination NiP–SiC has proved to be the most cost-effective and best-performing combination .Most studies concerning NiP-hard particle systems are performed using micron-sized particles and some commercial processes exist to obtain such composites. However, the development of nanotechnologies has raised the interest on the metal matrix nano-composite coatings because of their unique mechanical, magnetic and optical properties [3].In this work, the polarization and electrochemical impedance tests is also used to analyze the corrosion behavior of EN and EN composite coatings