Calgon Corporation

Daniel P. Vanderpool

Charles Y. Cha

Charles Y Cha

Daniel P Vanderpool

Richard G Varsanik

Shih-Ruey Tom Chen

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.

Alkylbenzotriazole compositions and the use thereof as copper and copper

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.

Controlling silica/silicate deposition using phosphonate combinations

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.

Alkoxybenzotriazole compositions and the use thereof as copper and

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.

Copper and copper alloy corrosion inhibitors

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.

Phenyl mercaptotetrazole/tolyltriazole corrosion inhibiting compositions

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:

Carboxylic/sulfonic polymer and carboxylic/polyalkylene oxide polymer

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:

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McMurray, PA, United States of America

Charles Y Cha