Controlling Corrosion and Water Quality Issues in HVAC Systems

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CHALLENGE

A commercial HVAC system equipped with high-efficiency gas boilers was experiencing various water quality issues that were negatively affecting both the system's performance and reliability.

The facility faced several operational risks:

Preventing Corrosion in Boilers and Pipes
Reduction of sludge formation and deposits

Operational Risks

Excessive hardness of the makeup water. This led to scale buildup and a loss of efficiency.
High pH levels in the system. This caused corrosion of the aluminum boiler block.
The presence of oxygen in the circuit. This accelerated corrosion and chemical instability.
Anaerobic bacterial activity. This increased the risk of localized corrosion.
Formation of sludge and deposits. This reduces heat transfer and may damage the system.

Additional prerequisites

Long-term protection of HVAC components made of various metals.
Stable and controlled water chemistry.
Preventing recurring maintenance problems.
Improved operational efficiency and a longer service life for the system.

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Consistent water quality throughout the facility

Consistent water quality throughout the entire system

Preventing Corrosion in Boilers and Pipes

Reduction of sludge formation and deposits

Improved heat transfer and system efficiency

Lower energy losses for better system performance and energy savings

Fewer maintenance interventions and lower operating costs

1. CORROSION PROTECTION

Product

WVT Plus 2208

A comprehensive corrosion inhibitor for closed HVAC systems.

Protects all metals, including aluminum.
Prevents corrosion and sludge buildup.
Stabilizes the system's water quality.
Compatible with systems that contain different types of metal.
Improves long-term operational stability.

2. BIOLOGICAL CONTROL

Product

Acticide MV

Designed to eliminate microbiological contamination and anaerobic activity.

Eliminates aerobic and anaerobic bacteria.
Prevents biological contamination.
Reduces microbiologically influenced corrosion (MIC).
Has a long-lasting effect.

3. CONDITIONING OF THE PROCESS WATER

In addition to the chemical treatment, process optimizations were also implemented:

Use of softened replenishment water (5–7 °fH).
Removal of oxygen through venting and degassing.
Adjustment and stabilization of the pH to approximately 8.

Results

Stable and controlled water quality: The system maintained balanced and chemically stable water quality over the long term.
Elimination of active corrosion problems: metal surfaces and sensitive aluminum components remained protected against further corrosion.
Significant reduction in sludge and scale buildup: cleaner pipes and heat exchangers improved circulation and reduced the buildup of contaminants.
Improved heat transfer performance: thanks to cleaner internal surfaces and fewer insulating deposits, the system operated more efficiently.

Improved efficiency of the HVAC system: lower energy losses contributed to better operational performance and energy savings.
Extended service life of boilers and piping: reduced chemical and mechanical stress helped preserve critical system components for longer.
Less maintenance and lower operating costs: fewer corrective actions and system cleanings resulted in lower total maintenance costs.

Contact

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Please feel free to contact us so we can explore together what we can do for you.

Tommy Verhoeven

Specialist in chemical solutions

tommy@wvt.be +32 (0) 492 27 97 72