Corrosion is best defined as “the process by which a material, usually a metal, combines with certain elements within its environment to produce a product that does not retain the useful properties of the original material”. Unfortunately, this seemingly innocuous textbook definition does not convey […]

Anodic protection has been shown to prevent corrosion of continuous digesters. Research indicates that this type of protection will also prevent caustic cracking in the both soda and kraft vessels. The purpose of this paper is to familiarize pulp mill personnel with the basic mechanism […]

Reverse current electrolysis switches have been used for many years to minimize stray current corrosion damage to underground metallic structures. Various types of systems have been utilized with varying electronics industry has come of age resulting in new, more reliable, higher power devices for the […]

Anodic protection systems have been installed in eight hydraulic continuous digesters and one impregnation vessel. Results indicate that corrosion and caustic cracking have been mitigated by the application of anodic protection. Operating characteristics, hardware improvements and digester inspection results are discussed. Potential and coupon monitoring […]