Sn/Al2O3 Composite as Protective Carbon Steel Coating
The corrosion resistance of tin and Sn/Al2O3 composite layers electrodeposited from SnCl2 aqueous solutions containing N-[(4-aminophenyl) sulfonyl] acetamide (SA), as additive, and Al2O3 have been investigated. The corrosion
resistance was evaluated in 0.1 mol L−1 HCl solution using Tafel polarization and electrochemical impedance spectroscopy (EIS) techniques. Tafel polarization revealed a perturbation of cathodic reaction and a considerable diminution of anodic reaction after the addition of
aluminum oxide into solution, leading to a significant decrease of corrosion current. The polarization resistance values evaluated from Nyquist plots indicated a significant improvement of carbon steel corrosion protection in the presence of aluminum oxide.
Document Type: Research Article
Publication date: 01 January 2013
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