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by Jim Tolly, Farwest Corrosion Control Company. Pipe and Gas Technology Magazine, July 2010
Pipelines routes that cross highways, bodies of water or railroads can require a directional bore. Pipelines pulled through a directional-drill bore are subject to stresses that can easily damage or destroy their protective coatings. Rock, shale and gravel can cut through or abrade coatings all the way to the pipe surface. Girth-weld coatings are sometimes viewed as the weak link in pipeline coating chain. In the application described, the successful solution was a was a three-layer polypropylene system that was plant-applied on the casings.
Cathodic Protection Controller is Powered by Galvanic Anode Current
By John Bollinger, Farwest Corrosion Control Company. Materials Performance Magazine, September 2008
A new concept developed by engineers at Farwest Corrosion Control Co. and designed particularly for steel water tank applications, uses a small percentage of the energy generated by magnesium anodes to power an electronic controller that automatically regulates the tank-to-water voltage potential in a galvanic cathodic protection (CP) system. The controller, which requires no external power or batteries, automatically adjusts the anode current to maintain a constant IR free tank-to-water potential.
