Accession Number:

ADD020078

Title:

Apparatus and Method for Removing Paint from a Substrate

Descriptive Note:

Patent application, Filed 08 Oct 2002

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

2002-10-08

Pagination or Media Count:

10.0

Abstract:

This patent application discloses an apparatus that removes coatings, such as paint, from a substrate that is disposed in a nonunderwater environment without damaging the substrate. The apparatus includes a sponge capable of having a fluid therein. The sponge has two surfaces. The first surface is placed in contact with the coatingsubstrate. High- and low-frequency ultrasonic transducers are positioned in contact with the second surface of the sponge. When the sponge is saturated with water it provides a path of water extending from the transducers to the substrate, which activates the transducers to generate the following a low-frequency acoustic field and a high-frequency acoustic field. This process produces micron-sized vapor or cavitation bubbles that impinge upon the paint and remove it from the substrate. The process requires relatively small amounts of water and produces a small amount of run-off of contaminated water. The sponge can be made from any porous elastic material including, but not limited to, cellulose, neoprene, foam rubber, or natural fiber. While virtually any substrate material may be stripped of a coating by the method presented here, it is noted that the method finds particular applicability to substrates such as fiberepoxy components that are easily damaged by conventional paint removal methods. 1 figure

Subject Categories:

  • Coatings, Colorants and Finishes
  • Acoustics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE