Immersion Chemical Milling/Blanking

Immersion chemical milling/blanking is a chemical process that dissolves material from unmasked (unprotected) areas of metallic parts immersed in a tank of heated and agitated chemical reagents.  The term "blanking" denotes small, thin workpieces, and "milling" indicates relatively large workpieces.

Process Characteristics

Parts are immersed in an acidic or basic chemical reagent
Masks protect areas from being chemically milled
Produces close tolerances and fine detail
Requires no finishing of workpiece surface
Requires no electric current to remove material

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Information provided is from Manufacturing Processes Reference Guide by Robert H. Todd, Dell K. Allen, and Leo Alting.--1st ed. Published by Industrial Press Inc., 1994.