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Unformatted text preview: ) basis sets. The NMR data were calculated by mean of the GIAO Model. All quantum-chemical calculations, including those of NMR data, were performed by ab initio level HF and DFT methods. Excellent agreement between the theoretical and experimental results was 1 13 1 13 found for the HF level H and C chemical shifts. The parameters of molecular geometry and H and C chemical shift values of the title compounds (I, II) in th e ground state have been calculated and compared with corresponding experimental result. 1 13 211 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia PHY-O3 THE CORROSION RESISTANCE OF ELECTROLESS Cu-P-SiC COMPOSITE COATINGS IN 1 M HCl 1 Soheila Faraji, Afidah Abdul Rahim, Norita Mohamed and Coswald Stephen Sipaut 1 1 2 2 School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia School of Engineering and Information Technology, Universiti Malaysia Sabah, P.O. Box 2073, 88999, Kota Kinabalu, Sabah, Malaysia E-mail: soheilafaraji@yahoo.com 1 The corrosion resistance of the electroless of Cu-P- SiC with Cu-P composite coating is compared by the potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques in 1 M HCl solution. The composite coatings were deposited via electroless plating with using of sodium hypophoshite (NaH2PO2) as a reducing agent. The coating compositions deposited and surface morphology of the coatings were analysed by using energy dispersive X -ray spectroscopy (EDX) and scanning electron microscopy (SEM), respectively. The Cu-P and Cu-P-SiC composite coatings were determined using X-ray diffraction (XRD) measurements. The study reveals that, the corrosion current density (icorr) and the double layer capacitance (Cdl) values decreased, the charge transfer resistance (Rct) and inhibition of efficiencies (IE %) increased with the incorporation of SiC particles in the Cu-P matrix, indicating the improvement in corrosion resistance. The effects of SiC concentrations on the corrosion resistance wer...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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