Abstract: An alkylbenzotriazole, in combination with mercaptobenzotriazole, tolyltriazole, benzotriazole and/or 1-phenyl-5-mercaptotetrazole, is used to inhibit the corrosion of metallic surfaces, particularly copper surfaces, in contact with an aqueous system. Systems and compositions are also claimed.

Abstract: Polyether polyamino methylene phosphonates, when used in combination with hydroxyphosphonoacetic acid (HPA) or amino tris methylene phosphonate (AMP), and added to various industrial water systems in concentrations between 0.1 mg/L and 50 mg/L, control silica/silicate deposition. In particular, this stabilization can be achieved under severe conditions which include elevated pH, high dissolved solids content, and high saturation levels of calcium carbonate.

Abstract: An alkoxybenzotriazole, in combination with mercaptobenzothiazole, tolyltriazole, benzotriazole, a substituted benzotriazole and/or 1-phenyl-5-mercaptotetrazole, is used to inhibit the corrosion of metallic surfaces, particularly copper surfaces, in contact with an aqueous system. Systems and compositions are also claimed.

Abstract: The use of alkoxybenzotriazoles to inhibit the corrosion of metallic surfaces in contact with an aqueous system. Systems and compositions containing alkoxybenzotriazole are also claimed.

Abstract: An alkoxybenzotriazole, in combination with mercaptobenzothiazole, tolyltriazole, benzotriazole, a substituted benzotriazole and/or 1-phenyl-5-mercaptotetrazole, is used to inhibit the corrosion of metallic surfaces, particularly copper surfaces, in contact with an aqueous system. Systems and compositions are also claimed.

Abstract: A composition which is useful for inhibiting the corrosion of copper and copper alloy metals in contact with an aqueous system is disclosed. The composition comprises phenyl mercaptotetrazole and tolytriazole and/or benzotriazole.

Abstract: The instant invention is directed to a process for inhibiting the formation and deposition of iron oxide in aqueous systems using at least 0.1 ppm of an admixture of:(A) a water-soluble polymer having an intrinsic viscosity of 0.05 to 2.5 dl/g, prepared from:(i) 35 to 90%, by weight, of an unsaturated carboxylic acid, or its salt; and(ii) 10 to 65%, by weight, of an unsaturated sulfonic acid, or its salt; and(B) a water-soluble polymer having an intrinsic viscosity of 0.05 to 2.5 dl/g, prepared from:(i) 35 to 90%, by weight, of an unsaturated carboxylic acid, or its salt; and(ii) 10 to 65%, by weight, of an unsaturated pendant polyalkylene oxide compound.The instant invention is also directed to an admixture of:(A) a water soluble polymer, having an intrinsic viscosity of 0.05 to 2.

Abstract: The instant invention is directed to a process for inhibiting corrosion and the formation and deposition of scale and iron oxide in aqueous systems, comprising adding to the system at least 0.1 ppm of a water-soluble polymer having an intrinsic viscosity of 0.05 to 2.5 dl/g, prepared from:(a) 35 to 90%, by weight, of an unsaturated carboxylic acid, or its salt;(b) 5 to 40%, by weight of an unsaturated sulfonic acid, or its salt; and(c) 5 to 40%, by weight, of an unsaturated, polyalkylene oxide compound, the total of (a), (b) and (c) being 100% weight of the polymer.