MATERIALS FOR PULPING AND PAPERMAKING APPLICATION

Materials problems in the pulp and paper industry are often traced to corrosion by aggressive environments that range from acidified oxidants to molten salts. Corrosion problems in the industry are likely to accelerate as a result of increased mill closure and water recycling. Higher corro-sivity, together with escalating costs of labor-intensive maintenance, will lead to increasing reliance on highly alloyed materials for corrosion pro-tection. Existing alloys can be iden-tified which perform adequately in most pulp and paper process chemis-tries, but the industry would welcome lower cost materials with equal corro-sion resistance. Expensive alloys will experience increasing competition from alternative corrosion control measures, particularly the increased use of non-metals and anodic/cathodic protection.