Method of Improving the Surface of Steel Pipe for Corrosion Resistant Coating and Apparatus for use in Carrying out the Metho

Author:  Stephen McConkey, Guntrum Franzky
Source:  US Patent 5,371,972
Doc ID:  1994014
Year of Publication:  1994
Abstract:  
Surface anomalies on pipe are removed preparatory to corrosion coating. The removal is conducted by brusing with wire brush elements or Comax brush elements which may rotate about axes parallel to the pipe axis or substantially radially off the pipe. Both kinds of brush elements may be used in combination. Before subjecting the pipe to brushing, the surface is particulate blasted to ermove ferric oxide and better expose surface anomolies. After wire burshing, the surface is again particulate blasted to provide an anchor pattern of indentations promoting adhesion of the coating.