Preventing Corrosion in Potable Water Infrastructure During Commissioning
How often do you think about the drinking water storage tanks and the complex plumbing hidden behind your walls? Unless you’re a plumber or a building contractor, these components probably don’t come to mind—until there's a problem.
"Out of sight" should never mean "out of mind" for corrosion. Rust and oxidation can compromise drinking water pipes and tanks before they are ever put into service. To combat this, Cortec® is urging contractors and plumbers to utilize VpCI®-649 HP, a specialized phosphate-free corrosion inhibitor designed for maximum protection during and after the hydrotesting phase.
and gas pipelines and pressure vessels
The Challenge: Residual Moisture After Hydrotesting
Hydrotesting is a standard industry practice for drinking water piping, fittings, and vessels after installation or repairs. This critical step confirms the system's integrity and identifies potential leaks under operating pressure.
However, there is a hidden risk: the same water used to confirm integrity often leaves behind residual moisture. This moisture can cause significant corrosion problems during construction waiting periods—long before tenants move in and begin using the water system.
Why Traditional Inhibitors Weren't Enough
For years, the industry had reliable corrosion inhibitors for oil and gas pipelines, but drinking water systems presented a unique hurdle. A solution was needed that could protect the metal while meeting the rigorous ANSI/NSF Standard 61 for drinking water system components.
Introducing VpCI®-649 HP: A Sustainable Breakthrough
In 2023, Cortec® achieved a major milestone with the launch of VpCI®-649 HP. This innovative phosphate-free water treatment is certified to meet ANSI/NSF Standard 61 when added to hydrotesting water (at concentrations up to 3%) and then drained.
This breakthrough allows contractors to hydrotest potable water tanks and pipes without leaving them vulnerable to rust during the often-long delays between construction and final commissioning.
Key Benefits of VpCI®-649 HP:
Multimetal Protection: Safely protects steel, copper, galvanized steel, and aluminum.
Full Coverage: Protects surfaces both above and below the water level (Vapor phase and Contact protection).
Environmentally Responsible: The formula contains no nitrites, phosphates, molybdenum, or chromates.
Easy Verification: Application can be easily confirmed using a PTSA tracer.
Securing the Future of Water System Commissioning
We all rely on clean drinking water, and that infrastructure depends on successful hydrotesting. By introducing a simple, certified corrosion solution, contractors and plumbers can avoid costly repairs and ensure the longevity of the systems they install.
Contact Cortec® today for more details on how to integrate VpCI®-649 HP into your next drinking water infrastructure project.
About Cortec® Corporation
Cortec® Corporation is the global leader in innovative, environmentally responsible VpCI® and MCI® corrosion control technologies. Headquartered in St. Paul, Minnesota, Cortec® manufactures over 400 products distributed worldwide, serving the construction, water treatment, and oil & gas industries with an unmatched dedication to sustainability.
FAQ.
What is a phosphate-free corrosion inhibitor?
It is a chemical treatment that prevents metal oxidation without using phosphates, which are often restricted in water treatment due to environmental concerns like algae blooms in local water sources.
Is VpCI®-649 HP safe for drinking water pipes?
Yes. It is specifically formulated and certified to meet ANSI/NSF Standard 61, which is the gold standard for components that come into contact with potable water.
Why is hydrotesting a corrosion risk?
Hydrotesting uses water to check for leaks. If that water isn't treated and residual moisture remains in the pipes after draining, it creates a perfect environment for rust to form before the system is officially commissioned.
Does it protect copper and aluminum?
Yes, VpCI®-649 HP is a multimetal inhibitor, meaning it provides high-level protection for steel, copper, galvanized steel, and aluminum simultaneously.
