Electropolishing process for internal surfaces of am parts

Abstract

A method for electropolishing and electroplating surfaces of structures. The method includes placing a first material within an internal volume of the structure, shrinking the first material such that a gap is formed between the first material and a surface of the structure, and applying a voltage across the gap. The first material may coat the inner surface or a portion of the inner surface of structure. The method may optionally include applying a second material to the surface of the structure such that the second material contacts the first material and the first material separates from the second material when shrinking of the first material. The method may include controlling the gap by coupling an electrically conductive part to the first material and coupling a nonelectrically conductive part to the structure and to the electrically conductive part.

Dependencies are inferred from the claim text.