Sodium benzotriazole CAS 15217-42-2

Sodium 1H-benzotriazole can adsorb onto metal surfaces to form a thin film, protecting copper, brass, bronze, and other metals from corrosion by the atmosphere and harmful media. Adding trace amounts of BTA-S to cold water can prevent the migration of copper ions, which can catalyze the corrosion of metals such as aluminum and iron. In heat transfer media, copper ions can cause small hole corrosion of aluminum. Adding 1H benzotriazole sodium to circulating water can prevent copper ions from catalyzing the oxidation of ethylene glycol.