Preparation and Characterization of Ni-diamond Composite Coatings Using Sedimentation Co-deposition Technique Alternative to Conventional Electrodeposition Technique | ||||
Egyptian Journal of Chemistry | ||||
Article 48, Volume 64, Issue 2, February 2021, Page 1065-1073 PDF (968.91 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/ejchem.2020.33984.2722 | ||||
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Authors | ||||
AbdAllah Faisal Hassan1; Ibrahim Mohamed Ghayad 2; Maamoun Maamoun3; Zeinab Abdel Hamid4; Fatma El-Zahraa M El-Saeed5; Ahmed Abdel-Khalek6 | ||||
1Central Metallurgical Reseach and Development Institute | ||||
2Corrosion Control & Surface Protection Lab., Metals Technology Dept., Central Metallurgical Research and Development Institute | ||||
3Central Metallurgical Research and Development Institute | ||||
4Central metallurgical research and development institute | ||||
5Chemistry Dept. Fac. of Science, Cairo University | ||||
6Chemistry Dept., Fac. of Sci., Benisuef University | ||||
Abstract | ||||
Composite coatings are the techniques involving co-deposition of inert particles with metal/alloy in order to promote the hardness, wear and corrosion resistance of the coatings. Micro crystalline Ni based composite coatings were prepared by conventional electrodeposition method from a Watt's-type electrolyte containing different contents of diamond particles. A modified electro-deposition method called sedimentation co-deposition (SCD) was also used to deposit Ni-diamond composite coatings having more diamond particles in the Ni matrix. Results show that Ni-diamond composite coating prepared by the SCD method contains quite high content of diamond (67-97%) as evidenced by EDS analysis. In contrary the traditional electrodeposition method shows low content of diamond (≈10-20%). The wear and corrosion resistance of the SCD Ni-diamond coating are markedly decreased in comparison to the conventionally electrodeposited coatings. | ||||
Keywords | ||||
Composite coatings; conventional electrodeposition; sedimentation co-deposition; corrosion resistance | ||||
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