The Cortec® Corrosion Inhibitor Advantage
One advantage of Cortec® closed loop water treatments is that they protect in multiple phases. Not only do they dissolve in water to fight corrosion on surfaces in direct contact with the circulating stream, but they also work in the vapor-phase, protecting metal surfaces above the water level. This vapor-phase action is exactly what is needed for pumps and piping that are periodically emptied but may contain residual water. Even if the system is complex or empty, Vapor phase Corrosion Inhibitors are able to protect in areas that contact-only corrosion inhibitors cannot reach.
Layup of Chiller Pumps on Standby
VpCI®-649 is a Cortec® water treatment recommended for protection of chiller pumps. It should be added to the closed loop / chiller water and circulated through the system before the pumps are shut down, leaving behind a corrosion inhibiting film that protects multi-metals above and below the waterline. Dosage is dependent on the length of protection
needed—a smaller dose during operation and an incrementally larger dose for longer periods of layup (up to two years). There is typically no need to flush the inhibitor out before bringing the pump back online, making the transition even more seamless than simply having a lower chance of corrosion complications. VpCI®-649 comes with a molybdate tracer for easy detection but is also available with a PTSA tracer for those with molybdate restrictions.
For pumps used with HVAC closed loops that reach temperatures of up to 302 °F (150 °C), Cortec® recommends using M-640 L, which also contains contact and Vapor phase Corrosion Inhibitors. It is an excellent replacement for silicates and phosphate/nitrite-based compounds and protects yellow and ferrous metals. It can be used in closed loops during operation or layup, allowing great flexibility for maintenance personnel or water treatment service providers.
Don’t Sweat It This Summer
Summer is hot, which is why hospitals and universities use comfort cooling systems in the first place. But there is no need to increase the extra heat and sweat of stress from trying to undo a corrosion problem on chiller pumps. Traditional corrosion inhibitors fall short of the goal, but Cortec® Vapor phase Corrosion Inhibitors easily achieve the void space protection needed so offline pumps can be ready to start at a moment’s notice.
About Cortec® Corporation
Cortec® Corporation is the global leader in innovative, environmentally responsible VpCI® and MCI® corrosion control technologies for Packaging, Metalworking, Construction, Electronics, Water Treatment, Oil & Gas, and other industries. Our relentless dedication to sustainability, quality, service, and support is unmatched in the industry. Headquartered in St. Paul, Minnesota, Cortec® manufactures over 400 products distributed worldwide. ISO 9001:2015, ISO 14001:2015, & ISO/IEC 17025:2017 certified.