Nontraditional machining processes are extensively employed to
produce geometrically complex and precision parts from engineering
materials in industries as diverse as aerospace, electronics and
automotive manufacturing [1,2]. There are many multiple
geometrically designed precision parts, such as deep internal cavities,
miniaturized microelectronics and fine quality components may only
be manufactured by nontraditional machining processes [3, 4].
Chemical machining is a well known nontraditional machining
process is the controlled chemical dissolution of the machined
workpiece material by contact with a strong acidic or alkaline
chemical reagent. Special coatings called maskants protect areas
from which the metal is not to be removed. The process is used to
produce pockets and contours and to remove materials from parts
having a high strength-to-weight ratio. Moreover, the machining
mehod is widely used to produce micro-components for various
industrial applications such as microelectromechanical systems
(MEMS) and semiconductor industries [5,6].