Title of article :
Investigation on the corrosion and oxidation resistance of Ni–Al2O3 nano-composite coatings prepared by sediment co-deposition
Author/Authors :
Feng، نويسنده , , Qiuyuan and Li، نويسنده , , Tingju and Teng، نويسنده , , Haitao and Zhang، نويسنده , , Xiaoli and Zhang، نويسنده , , Yu and Liu، نويسنده , , Changsheng and Jin، نويسنده , , Junze، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
Ni–Al2O3 composite coatings were prepared by using sediment co-deposition (SCD) technique from a Wattʹs type electrolyte containing nano-Al2O3 particles. The corrosion resistance and high temperature oxidation resistance of resulting composite coatings were investigated. It was found that the incorporation of nano-Al2O3 particles in Ni matrix refined the Ni crystal and changed the preferential orientation of composite coatings. Meanwhile, the corrosion and oxidation resistance were improved after the incorporation of nano-Al2O3 particles into Ni matrix. The nano-Al2O3 content in deposits plays an important role for improving the corrosion and oxidation protection. The corrosion and oxidation resistance of Ni-Al2O3 nano-composite coatings produced via SCD technique are superior to that of CEP technique. Compared to pure Ni and Ni-Al2O3 composite coatings fabricated using CEP technique, the Ni–7.58 wt.% Al2O3 composite coating obtained by SCD technique exhibits better corrosion resistance and enhanced high temperature oxidation resistance. Moreover, the mechanism of corrosion and high temperature oxidation resistance of Ni–Al2O3 nano-composite coatings are discussed.
Keywords :
Sediment co-deposition , CORROSION RESISTANCE , High temperature oxidation resistance , Nano-Al2O3 composite coatings
Journal title :
Surface and Coatings Technology
Journal title :
Surface and Coatings Technology