Effects of As-Cast Surface Conditions and Local Geometry on Plating
The inhomogeneity of casting microstructure can present many challenges to
subsequent processing of castings such as electroplating. Specifically the
surface microstructure and local topographic features have significant impact on
the electroplating deposition thus the continuity of the plating films. The
authors attempt to categorize the common casting surface microstructure features
and correlate them to the electroplating characteristics such as conductivity
and current density distribution, which in turn affect the plating deposition.
Forming mechanisms of some of the most common casting surface microstructures
that affect electroplating are discussed. Desirable casting surface
microstructure for electroplating and the casting design and process practices
to achieve it are proposed.