Improvement the Corrosion Resistance of Cr / Ni Alloy Electroplating in 3.5% NaCl Solution
Publish place: Fourth International Conference on Modern Research in Engineering Sciences and Technology
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
NSOECE04_186
تاریخ نمایه سازی: 9 مرداد 1395
Abstract:
The overall objective of this study is selecting an optimal method for the production of chromium/ nickel coatings to reduce the density and permeability of the surface cracks and provide good corrosion resistance. For this purpose, Cr and Ni electrodeposited from Cr(III) - Ni(II) bath on St-12 steel samples by using pulse current, according to the selective three methods. The microstructures of the coatings were studied by optical microscopy (OM) and scanning electron microscopy (FESEM). The coating corrosion resistance has been compared through electrochemical polarization in a 3.5% NaCl solution. Despite the high corrosion resistance for all three types of coatings; It also looks at the use of pulse current: corrosion resistance of multilayer alloy coatings are higher than double layer, and corrosion resistance of double layer alloy coatings are higher than the single layer.
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Authors
Seyed Mohsen Madani
Graduate student of Materials Engineering, Department of Materials Engineering, Foolad Institute of Technology, Esfahan, Iran
Ali Shafyei
Associate Professor of Materials Engineering, Department of Materials Engineering, Foolad Institute of Technology, Esfahan, Iran
Abbas Najafizadeh
Professor of Materials Engineering, Department of Materials Engineering, Foolad Institute of Technology, Esfahan, Iran
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