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Abstract

Apparatuses and methods for creating phobic and philic surfaces (for example, superphobic and superphilic surfaces) are disclosed. Embodiments include methods for determining a heat treatment technique that increases the likelihood that a uniformly etched surface with minimal pitting will be formed when the surface of a material is subject to etching. Additional embodiments include evaluating the PRE number of the material, performing an anodic polarization sweep of the material, evaluating the polarization curve (current vs. potential) for the material, performing different etching protocols depending on the range of values the PRE number of the material belongs, and/or pulsing the current applied to the material during the etching process. Additional embodiments include apparatuses and methods for predictably etching a surface (such as a surface of a metal alloy) of a material, which can include etching interior portions of a hollow work piece.

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First Claim