Abstract
XRD and EDX analyses confirmed the presence of Ag in all coatings deposited using electrochemical method and silver. The mean thickness coating was noted to be highest in EHA/AG group (102.20 4.20 um) followed by PHA (76.40 2.20 um). Mean coating thicknesses in other groups were: PHA/AgNO3 (76.20 1.29 um); EHA (32.98 2.50 um); EHA/ Ag/2-layers (30.70 2.40 um); EHA/AgNO3 (8.60 0.60 um). The average silver content measured was highest with 6.55% in EHA/Ag/2-layer followed by 3.92% in EHA/AgNO3, 0.38% in EHA/Ag and 0.10% in PHA/AgNO3. The electrochemical technique deposited a uniform coating onto the disc surface with clearly defined microcrystals as compared to the PHA-coated discs where the surface appeared smoother. The EHA coating, however, appeared less dense when compared with the PHA coating. DECLARATIONS
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