EONCOR N370 is a nitrite-based corrosion inhibitor designed for a closed cycle water cooling system & passivation agent. We specifically design EONCOR N370 to deal with corrosion problems in carbon steel systems. In application, this product forms stable oxide layer to prevent corrosion due to electrolysis of different metals in the system. As a result, the machine keeps clean, and its maintenance costs is lower. EONCOR N370 is also excellent for passivation of steel surfaces and cast iron. However, note that we do not recommend this product for aluminum.