Tiwari, S K and Mishra, T and Gunjan, M K and Bhattacharyya, A S and Singh, T B and Singh, Raghuvir (2007) Development and characterization of sol–gel silica–alumina composite coatings on AISI 316L for implant applications. Surface and Coatings Technology, 201 (16-17). pp. 7582-7588.
Sol–gel alumina coatings were deposited on medical grade stainless steel (AISI 316L) with an intermediate layer of silica by dip-coating method. The coatings obtained were homogeneous, crack-free and consisted of low crystalline γ-Al2O3 along with some boehmite phase. EDAX revealed the presence of only Al in the film. The corrosion performance of alumina-coated stainless steel was evaluated by electrochemical polarization, open-circuit potential measurement and chronoamperometry in Ringer's solution. Coating has shown to enhance the pitting potential of AISI 316L by 470 mV and reduced passive current ≤ 10− 9 A cm− 2. The formation of thermodynamically stable silica–alumina interface was proposed to account for enhanced corrosion protection behaviour of the coating.
|Uncontrolled Keywords:||Stainless steel; Coating; Sol–gel; Aluminium oxide; Corrosion resistance; Bioimplant|
|Divisions:||Corrosion and Surface Engineering|
|Deposited By:||Sahu A K|
|Deposited On:||02 Jun 2010 11:02|
|Last Modified:||17 Feb 2012 16:50|
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