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Corrosion Inhibitor for Hydrotesting Drinking Water Systems
Cortec® recently announced that its newest corrosion inhibitor for hydrostatic testing (i.e., hydrotesting) is certified to meet ANSI/NSF Standard 61 for use in hydrotesting of drinking water system components! This opens exciting opportunities for those who fabricate, install, or service drinking water system components held to stringent safety requirements. VpCI®-649 HP is a specialty concentrated liquid formulation that contains contact and vapor phase corrosion inhibitors, along with a hard water stabilizer and an organic dispersing agent. It protects against corrosion at dosages as low as 0.3% by weight. It also has an extremely low chloride impact (less than 0.6 ppm at 0.3% dosage) for use in systems with tight chloride restrictions. As it circulates throughout the system, it leaves behind a protective molecular layer on all metal surfaces. After the water treated has been drained, residual protection continues on components made of steel, copper, galvanized steel, or aluminum. VpCI®-649 HP is primarily intended for corrosion protection during hydrotesting. This is a critical practice used in many industries to ensure vessels, piping, and tanks do not leak and can withstand pressure specifications. The unfortunate side effect is that moisture can incite corrosion during and after hydrotesting, leading to further problems during the lifetime of the new components. In the past, many industries have found standard VpCI®-649 to be an outstanding source of corrosion protection during this sensitive phase. Use, however, was limited to equipment that would not be exposed to drinking water. With the development of VpCI®-649 HP and its certification to meet ANSI/NSF Standard 61 for use in treatment of drinking water system components, the opportunities for corrosion protection during hydrotesting of pumps, valves, piping, fittings, and tanks used to carry potable water have suddenly expanded!
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