Learning something about Tolyltriazole
Tolyltriazole is a kind of tan to light brown granules or beige pellets with a characteristic odor. The Molecular Formula is C7H7N3, Molecular Weight is 133.15 . It is stable in acids and alkalies solution, flammable, incompatible with strong oxidizing agents. The Density is 1.273 g/cm3, Boiling Point is 289.3 C at 760 mmHg, Melting Point is 76-87 C. Its EINECS is 249-596-6 and CAS Registry Number is 29385-43-1.
Tolyltriazole has three nitrogens. 1,2,3-Benzotriazole (1H-benzotriazole) has -N=N- bond whereas 2H-Benzotriazole has two -C=N-bonds. Benzotriazole is a parent material to produce UV-absorbers. 1,2,3-Benzotriazole: Benzene ring-fused azole compounds; white to off-white crystalline powder; insoluble in water, soluble in ethanol, melting at 98.5 C. Azole is a five-membered heterocycle compound containing unsaturated bonds and Nitrogen atoms.
Tolyltriazole(CAS NO:29385-43-1) is a very effective corrosion inhibitor for copper and its alloys. It is especially useful in systems where fluids are in continuous contact with metals that require protection. In addition to copper, and its alloys, other metals that can be protected include zinc, cobalt and silver. When tolyltriazole is used in multi-metal systems with other corrosion inhibitors, it will also protect aluminum and steel.
It is mainly used as antirust and corrosion inhibitor for metals, and for antirust oil products, the gas phase corrosion inhibitor of copper and copper alloy, lubricant additive, cycle water treating compound and auto antifreeze. It also can be used with manifold sterilization algaecide and has a very fine corrosion mitigation effect on close cycle cooling water system.
Tolyltriazole has been widely used as a corrosion inhibitor for copper and copper alloy heat exchanger components in power plant cooling water systems. In this work the effectiveness of this compound protection in the presence of free chlorine, monochloramine, and ammonia was studied, in the context of using secondary treated municipal wastewater as cooling water.
Results indicated that the corrosiveness of ammonia becomes negligible in the presence of Tolyltriazole. Also, monochloramine represents a better disinfection agent in terms of copper corrosion protection by Tolyltriazole than free chlorine.
The packing density, film thickness, and number of layers of Tolyltriazole adsorbed on the Cu surface were estimated from measurements and compared with estimates from other studies. It was found that copper can work as a catalyst for free chlorine to degrade Tolyltriazole and that the surface packing density, film thickness, and number of layers increased in the presence of monochloramine.
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