Process description and principles of operation.
The bristle blasting process is a new innovation that both removes corrosion and generates an anchor profile by using a specially designed rotary bristle tool. This results in both corrosion removal and a micro-indentation that exposes fresh surface.
Consequently, surfaces that have been treated by the bristle blasting tool have a texture and visual cleanliness that mimics those obtained by traditional grit blasting processes.
Tool performance and life
Tests have indicated that the bristle blaster tool can perform on a par with traditional grit blasting processes. That is, corroded/pitted steel surfaces have been restored to a near-white or white metal appearance after treatment. In addition, an anchor profile that ranges from 65-83 µm (Rz) is routinely obtained on standard API 5L steel. This same testing program has also shown that corroded surfaces can be thoroughly treated at a rate of 1,1 m2/hr.
Chief advantages of the bristle blasting process lie in its simplicity and in its economical advantages. The tool itself is driven by a light-weight hand held power tool that can utilize either a standard electrical power source, or compressed air. Safety precautions taken by the operator are the same as those which apply to ordinary hand-held tools.
In addition, the bristle blasting process is eco-friendly, and does not use or generate hazardous waste, thereby providing a “green” approach to corrosion removal and surface preparation of steel components.
Although the bristle blasting process is ideally suited for spot-repair applications, it can also be readily applied to larger surface areas where use of other metal cleaning processes may be prohibited or impractical.