Investigating Surface Condition of Corona Aged Epoxy-Al Nanocomposites by Adopting Wavelet Transform

The effect of corona exposure on surface condition of epoxy Aluminium (Al) nanocomposites has been analyzed in the present study. Multi resolution signal decomposition (MRSD) analysis has been performed by employing fourth order Daubechies wavelet (db4) function, to analyze the surface profile of the test specimens. The standard deviation of approximation and detail coefficients at each decomposition level are found to be lesser for 10 wt.% epoxy Aluminium nanocomposite specimen. Surface roughness factor has reduced after Al filler inclusion up to 10 wt.%. Corona exposure has significantly affected the surface profile of the test specimens resulting in the increment of surface roughness factor at each decomposition level.