Effect of Pretreatment on the Properties of Electroless Nickel Phosphorios Coating

  • سال انتشار: 1388
  • محل انتشار: دومین کنفرانس بین المللی رنگ و پوشش خودرویی
  • کد COI اختصاصی: ICAPC02_015
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 2083
دانلود فایل این مقاله

نویسندگان

A Zarebidaki

PhD Student

S. R. Allahkaram

Associate Professor and Member of Center of Excellence in High Performance Ultra Fine Materials

T Rabizadeh

MSc Student School of Metallurgy and Materials Engineering, University College of Engineering

چکیده

The autocatalytic (electroless) deposition of Ni–P based alloys is a well-known commercial process that has found numerous applications because of their excellent anti-corrosive, wear, magnetic, solderability, etc,… properties. It is a barrier coating, protecting the substrate by sealing it off from the corrosive environments, rather than by sacrificial action. The corrosion resistance of Ni-P coating is affected by its thickness, phosphorous content, adhesion, microstructure, etc. In this study, the influence of mechanical polishing pre-treatments on steel substrates is investigated in terms of microstructure, deposition rate, adhesion, electrochemical and corrosion properties of electroless Ni-P nano coatings with 9-10 wt. % P content. XRD analysis of Ni-P coatings demonstrated the nanocrystalline structure of coatings with grain size of 39 nm. Results showed that pretreatment of substrate can affect the microstructure and nodularity of coatings. Coating with the lowest nodularity have the highest mechanical and electrochemical resistance due to the absence of nodule boundaries. Results also showed that roughness of coating increased with increasing the roughness of substrate and with decreasing the substrate roughness adhesion of coating decreases.

کلیدواژه ها

Electroless, Ni-P nano coating, Corrosion, Surface preparation

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.