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Tag: Corrosion

  • The Outdoor Problem Inside Your Data Center Energy Bill

    The Outdoor Problem Inside Your Data Center Energy Bill

    Data center executives are accustomed to tracking Power Usage Effectiveness (PUE) to the second decimal place. They invest in advanced cooling architectures, optimize airflow management, and benchmark against the best hyperscalers in the industry. Yet one of the most consistent drags on cooling efficiency sits entirely outside the building—and outside most efficiency roadmaps. The physical condition and thermal environment of the outdoor HVAC equipment that actually handles the heat rejection.

    Cooling already represents a significant share of total data center energy consumption. According to McKinsey’s 2024 research, cooling systems account for approximately 40% of a typical data center’s total facility energy use. A separate analysis by Pew Research Center found that cooling’s share ranges from about 7% at the most efficient hyperscale facilities to over 30% at less efficient enterprise operations. Much of what separates those two ends of the spectrum comes down to how well the physical cooling infrastructure is maintained and protected.

    Two specific outdoor degradation factors — solar-driven thermal loading and coil fouling from corrosion and environmental debris — are responsible for a material portion of excess cooling energy consumption and are largely preventable. Understanding and addressing them proactively is one of the most accessible levers for data center operators looking to improve PUE without major capital reinvestment.

    How the Outdoor Environment Undermines Data Center Cooling Efficiency

    Data center cooling systems — whether centralized chilled-air systems, chilled-water loops, or computer room air conditioners (CRACs) — all share a common dependency. They must reject heat to the outdoor environment. That exchange occurs through rooftop-mounted condensing units, cooling towers, and air handlers. The performance of this equipment is directly affected by the conditions in which they operate.

    Solar thermal loading. Rooftop HVAC cabinets and condensing units in direct sunlight regularly reach exterior surface temperatures of 180°F or higher. That temperature is even on days when ambient air temperatures are moderate. The thermal energy transfers into the cabinet interior, raising the temperature of the environment in which the compressor and refrigerant circuit operate. The result is longer run cycles, higher energy draw per ton of cooling delivered, and accelerated mechanical wear. HVAC units are rated under ARI laboratory conditions that do not replicate the real-world rooftop heat load. This means most facilities are operating equipment that performs below its rated efficiency from day one of outdoor deployment.

    Coil fouling and corrosion. The heat exchanger coil is the core of any HVAC unit’s efficiency. Over time, exposure to airborne contaminants, humidity, industrial pollutants, and salt or chemical particulates corrodes the coil’s fin-and-tube structure and degrades the fin-to-tube bond that enables efficient heat transfer. Biological fouling adds another layer of blockage. The coil continues to function, but at progressively lower efficiency with more kilowatts consumed per ton of cooling, higher compressor strain, and an accelerating path toward failure. In data center environments, where cooling demand is continuous and mission-critical, this degradation directly erodes PUE.

    The Scale of the Problem at a Typical Data Center

    The Congressional Research Service has noted that roughly half or more of a data center’s electric power demand stems directly from IT equipment operation. The remainder is going to cooling. For a 100-megawatt facility — a scale increasingly common as AI-driven workloads drive capacity expansion — that means tens of megawatts of continuous cooling load operating around the clock, every day of the year.

    Even a modest improvement in cooling system efficiency compounds significantly at that scale. A 10% reduction in cooling energy consumption on a 40MW cooling load represents 4MW of recovered capacity. That is enough to power thousands of additional servers, defer infrastructure expansion, or directly reduce utility expenditure. The industry average PUE remains approximately 1.56, compared with a hyperscale benchmark closer to 1.2, according to the Uptime Institute’s 2024 survey. Closing that gap requires addressing every layer of inefficiency, including the ones that originate outdoors.

    ThermalBlock by Coat Zone®: Eliminating Solar Heat Load at the Source

    ThermalBlock by Coat Zone® is a high-performance radiant barrier coating applied directly to the exterior surfaces of rooftop HVAC cabinets, condensing units, air handlers, and exposed ductwork. It addresses solar thermal loading before it becomes a compressor burden.

    Independent testing confirms that ThermalBlock by Coat Zone® blocks up to 93% of solar heat, reducing treated surface temperatures to within 10°F of ambient air even under peak summer solar conditions. It reflects 89% of visible light (ASTM C1549) and rejects 87% of heat gain from external sources (ASTM C1371), achieving a Solar Reflective Index of 108 across varying wind conditions. This is a score that holds up in real-world deployment, not just laboratory baselines. The thermal conductivity of treated surfaces is reduced by approximately 13% (K-Value), while thermal resistance increases by approximately 20% (R-Value).

    For data center operators, the operational impact is direct:

    • Reduced compressor run time during peak ambient temperature hours
    • Lower kWh consumed per ton of cooling delivered
    • Extended equipment lifespan — ThermalBlock by Coat Zone® increases HVAC system longevity by up to 30%
    • ROI achievable within 12 to 36 months on minimal capital investment

    ThermalBlock by Coat Zone® is applied on-site to both new and existing equipment, with a water-based, low-VOC formulation and a 10-year warranty. This makes it a low-disruption, low-risk upgrade compatible with active operational environments.

    CoilSafe®: Protecting the Efficiency Core of Your Cooling System

    CoilSafe® is an ultra-thin inorganic coating — just 8 to 10 microns thick, approximately 40 times thinner than standard epoxy coil coatings — applied to HVAC heat exchanger coils to prevent corrosion, restore heat transfer performance, and inhibit biological fouling. Where standard coatings add bulk and can impede airflow, CoilSafe® wicks into the coil’s structure at the molecular level. It retightens the fin-to-tube bond and forms a glass-like inorganic surface that resists moisture, oils, mold, and environmental debris without restricting heat exchange.

    The result is a measured 10% improvement in HVAC efficiency (kW/ton), corrosion protection validated through 6,000 hours of salt fog testing (ASTM B117) and 25,000 hours of atmospheric corrosion exposure (ASTM G50), and zero fungal growth in ASTM G21 testing. Because it forms a permanent covalent bond, CoilSafe® will not flake, peel, or degrade — even under sustained environmental stress.

    For data center cooling systems operating continuously in environments ranging from coastal humidity to urban industrial air, this level of coil protection directly translates to sustained efficiency over the full service life of the equipment. Rather than the gradual performance erosion that typically goes unmeasured until a replacement event forces the issue.

    Proven at Scale: The AT&T Galveston Case

    The durability and performance of CoilSafe® is not theoretical. AT&T faced a severe coil corrosion problem at its Galveston Island facility. This area is one of the most corrosive coastal environments in the United States. Constant Gulf of Mexico salt spray was reducing rooftop HVAC coil lifespan to just three to four years. After applying CoilSafe® to new rooftop units at installation, a follow-up inspection nearly eight years later found the coils remained pliable, corrosion-free, and fully functional. The application also delivered a 15% reduction in HVAC energy consumption. This deferred replacement capital and materially improved operating efficiency at a facility where HVAC reliability is non-negotiable.

    The AT&T result is instructive for data center operators. In environments with elevated corrosion risk — coastal proximity, industrial air quality, high humidity cycling — the degradation timeline for unprotected coils is measurable in years, not decades. CoilSafe® interrupts that cycle at the point of installation.

    A Low-Cost Lever for a High-Cost Problem

    Data center efficiency investments tend to focus on IT hardware, power distribution architecture, and advanced cooling system design. All of which involve significant capital commitment and planning cycles. ThermalBlock by Coat Zone® and CoilSafe® represent a different category of investment. That is, protective coatings applied to existing equipment that recover efficiency being lost to entirely preventable physical degradation.

    The combination of reduced solar heat loading and restored coil performance addresses the two primary outdoor-environment contributors to cooling inefficiency, with ROI timelines that compare favorably to virtually any alternative efficiency measure under consideration. For data center executives focused on PUE improvement, sustainability commitments, and operational cost management, these coatings belong in the efficiency conversation.

    Contact Coat Zone® to learn how ThermalBlock by Coat Zone® and CoilSafe® can be integrated into your facility’s efficiency strategy.

    Citation List

    • Pew Research Center. “What We Know About Energy Use at U.S. Data Centers Amid the AI Boom.” October 24, 2025. pewresearch.org
    • Congressional Research Service. “Data Centers and Energy: CRS Report R48646.” congress.gov/crs-product/R48646
    • Hanwha Data Centers. “Data Center Energy Efficiency Best Practices: 11 Tips from Top Operators.” October 10, 2025. hanwhadatacenters.com
    • The Network Installers. “Data Center Energy Consumption Statistics & Data (2026).” January 12, 2026. thenetworkinstallers.com
    • Etalytics. “IEA Energy Efficiency Report 2025: Data Center Cooling.” December 18, 2025. etalytics.com
  • Your HVAC Coils Are Costing You More Than You Think

    Your HVAC Coils Are Costing You More Than You Think

    Here’s something most business owners don’t realize: your HVAC system didn’t start losing efficiency the day it broke down. It started losing efficiency the day it was installed. Slowly, quietly, and in a way that shows up on your utility bill long before it shows up as a service call.

    The culprit is usually the coil.

    What Happens to HVAC Coils Over Time

    The heat exchanger coil is the part of your HVAC system that actually does the heating and cooling. It’s a tight network of fins and copper tubing. When it’s working properly, heat transfers efficiently between the refrigerant and the air moving through your building.

    But over time, a few things happen. Corrosion sets in. Mold and debris accumulate in the fins. The bond between the fin and the copper tube, which is critical for heat transfer, begins to loosen. The coil is still technically “working,” but it’s working harder to do less. Your system runs longer cycles, pulls more kilowatts, and wears out faster.

    HVAC systems already account for 50% or more of energy use in most commercial buildings. A degraded coil pushes that number higher every month.

    So What Does CoilSafe® Actually Do?

    CoilSafe® is a thin-film inorganic coating applied directly to your HVAC coil, either in the field or at a service shop. At just 8 to 10 microns thick (about 40 times thinner than a standard epoxy coating), it doesn’t block airflow or reduce heat transfer. It does the opposite.

    The coating wicks into the coil’s structure at a molecular level, retightening the fin-to-tube bond and restoring the heat transfer that corrosion and age have degraded. It also forms a glass-like surface. This surface resists mold, moisture, bacteria, and the kind of environmental gunk that clogs fins and drives up maintenance costs.

    The result is a measurable 10% improvement in HVAC efficiency, less energy consumed per hour of operation, and a unit that performs closer to what it did the day it left the factory.

    What That Means for Your Bottom Line

    For business owners, the math is pretty straightforward. CoilSafe® is a one-time application on existing equipment. You avoid replacement, avoid major downtime, and avoid significant capital outlay. Most clients see a return on investment within 12 to 36 months through lower utility bills and reduced maintenance frequency.

    It also extends equipment life considerably. Corrosion is one of the primary reasons HVAC units get replaced before their time. Protect the coil, and you protect the investment you’ve already made in your equipment.

    And because CoilSafe® is antimicrobial and supports better indoor air quality, there’s a secondary benefit for your team and your customers: cleaner air circulating through a cleaner system.

    TL;DR

    If your HVAC system is more than a few years old and you haven’t thought about the coil, you’re probably leaving money on the table. Money in energy costs, in maintenance calls, and in equipment life. CoilSafe® is a simple, proven fix for a problem most people don’t know they have.

    Reach out to Coat Zone to learn more or find a dealer near you.

  • Navigating New Emissions Landscapes

    Navigating New Emissions Landscapes

    The regulatory framework surrounding greenhouse gas (GHG) emissions is currently undergoing a significant transformation. With the EPA moving to eliminate the 2009 Endangerment Finding and the subsequent vehicle and engine emission standards through model year 2027, the industrial and commercial sectors are bracing for a potential shift in air quality dynamics.

    While the legal and administrative debates continue, the immediate concern for facility managers and engineers is the physical impact these changes may have on critical infrastructure, specifically HVAC systems.

    The Correlation Between Emissions and Corrosion

    A reduction in federal oversight of tailpipe and engine emissions can lead to higher localized concentrations of pollutants such as nitrogen oxides (NOx) and sulfur dioxide (SO2). When these compounds interact with atmospheric moisture, they create a corrosive environment that is particularly aggressive toward aluminum and copper. These metals are the primary components of HVAC heat exchangers.

    This “pollution-related corrosion” is not just an aesthetic issue; it is a fundamental threat to operational efficiency. As coils corrode, the heat transfer process is hindered, forcing systems to run longer and harder to maintain setpoints. According to perspectives shared in HPAC Engineering, the industry is closely watching how these environmental shifts will influence the long-term lifecycle of equipment and energy consumption (HPAC, 2026).

    Indoor Air Quality (IAQ) and the External Link

    The quality of outdoor air directly dictates the burden placed on a building’s filtration and ventilation systems. If outdoor pollutants increase, HVAC systems must operate more efficiently to maintain high Indoor Air Quality. Corroded, fouled coils can become breeding grounds for biological growth, further compromising the air delivered to occupants.

    As noted in reports regarding recent legal challenges from environmental groups, the focus remains on the intersection of public health and atmospheric integrity (Oil & Gas Journal, 2026). For facility owners, this means the “preventative” part of maintenance has never been more vital.

    Engineering Resilience with Coat Zone

    At Coat Zone, we believe that while regulations may change, the standard for equipment protection should not. We provide advanced coating technologies designed to insulate HVAC assets from the very pollutants that may soon increase in the atmosphere.

    • CoilSafe & CoilSafe Plus: These high-performance coatings are engineered to provide a barrier against the corrosive effects of SO2 and NOx. By preventing coil fin degradation, these products help the system maintain its original SEER rating and heat transfer efficiency, even amid fluctuations in outdoor air quality.
    • ThermalBlock: Efficiency is the best hedge against rising operational costs. ThermalBlock works to restore and maintain the thermal performance of older units. This ensures that even as environmental stressors increase, energy footprints do not.

    A Proactive Path Forward

    The uncertainty around federal mandates highlights a clear reality. That is the responsibility for equipment longevity and indoor environmental health lies with proactive maintenance. By utilizing specialized coatings, facilities can “future-proof” their HVAC investments against a more volatile atmospheric environment.

    Coat Zone works to apply these solutions, ensuring your infrastructure remains efficient, clean, and protected, no matter which way the regulatory winds blow.

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  • Understanding ASTM G31 and the Power of Covalent Coatings

    Understanding ASTM G31 and the Power of Covalent Coatings

    In the world of infrastructure and manufacturing, corrosion is the “silent killer.” For metals submerged in harsh environments, like the salty, turbulent depths of the ocean, protection isn’t just a preference; it’s a necessity.

    But how do we know which coatings actually work? That’s where ASTM G31 comes in.

    What is ASTM G31?

    ASTM G31 is the gold standard guide for Laboratory Immersion Corrosion Testing of Metals. Rather than a rigid, “one-size-fits-all” procedure, ASTM G31 serves as a comprehensive guide for designing tests that simulate real-world immersion conditions.

    The guide covers every critical variable that can influence how a metal reacts to its environment, including:

    • Test Conditions: Solution composition, temperature, and fluid motion.
    • Apparatus & Sampling: How specimens are supported and the volume of solution used.
    • Interpretation: Calculating corrosion rates and identifying pitfalls that could lead to misleading results.

    Why is This Test Important?

    The primary goal of ASTM G31 is to promote better correlation of results and reduce conflicting reports. Because different metals and alloys respond uniquely to environmental factors, a standardized approach to recording data ensures that when a coating claims to protect a metal, that claim is backed by rigorous, scientific observation.

    Real-World Results: CoilSafe® vs. The Gulf of Mexico

    To put these standards to the ultimate test, Coat Zone conducted a massive field exposure evaluation on Galveston Island, Texas. Using the principles of ASTM G31, we submerged metal samples to a depth of 3 meters in the sea for a staggering 26,200 hours.

    The environment was brutal: continuous exposure to chloride ions, tidal flows, and seasonal temperature cycling.

    The Methodology

    Three common industrial metals, Aluminum, Galvanized Steel, and Stainless Steel, were tested. Each sample was “half-and-half”: one side was left bare, while the other was protected by CoilSafe®, an 8-micron covalent film.

    The Results

    The contrast between the coated and uncoated sections was night and day. After nearly three years of submersion, the results verified by CZI labs showed:

    ParameterCoilSafe® CoatingUncoated Metal
    CorrosionNoneSevere
    PittingNoneHeavy
    Microbial GrowthSlightSeverely Degraded
    AdhesionCovalent BondN/A

    While the uncoated sections suffered from extensive deterioration driven by chloride-driven corrosion, the CoilSafe® sections exhibited complete corrosion resistance.

    The Verdict

    The Galveston Island test proves that when it comes to extreme submersion, the right science makes all the difference. By following the rigorous guidelines of ASTM G31, Coat Zone has demonstrated that their 8-micron covalent film provides a nearly impenetrable barrier against the ocean’s most corrosive elements. Learn more here.

  • Securing the AI Boom in the Americas

    Securing the AI Boom in the Americas

    The data center market in the Americas is no longer just growing. The AI boom is surging at a pace that is fundamentally altering the global digital landscape. According to recent industry analysis from Business Facilities, the Americas have solidified their lead as global data center capacity explodes. This lead is largely driven by the unrelenting demand for Artificial Intelligence (AI) and high-performance computing (HPC).

    As of 2025, the U.S. remains the epicenter of this expansion. Northern Virginia, the world’s largest data center market, saw under-construction capacity jump by 80% in the first half of 2025 alone (CBRE). However, this rapid growth brings two critical challenges that threaten to stall the AI revolution. Unprecedented energy demand and the silent degradation of cooling infrastructure.

    At Coat Zone, we believe that the key to sustaining the AI boom isn’t just about building more. It’s about protecting and optimizing what we already have.

    The Energy Paradox: AI’s Massive Cooling Appetite

    Data centers are among the most energy-intensive facilities on Earth. In 2024, data centers consumed approximately 183 terawatt-hours (TWh) in the U.S. alone—roughly 4% of the country’s total electricity (Pew Research). By 2030, this demand is projected to grow by 133% to 426 TWh.

    The “energy hog” in the room is cooling.

    • The Cooling Tax: Cooling systems are the second-largest energy consumer in a data center. They account for 30% to 50% of total energy use in less-efficient enterprise facilities (IEA/Coat Zone).
    • The AI Multiplier: AI-focused servers generate significantly more heat than traditional servers, requiring 2 to 4 times the power and, consequently, a massive increase in cooling capacity to prevent catastrophic hardware failure.

    When cooling efficiency drops even by a small percentage, the Power Usage Effectiveness (PUE) of a data center skyrockets. This drop leads to millions of dollars in wasted operational expenditure (OpEx).

    The Corrosion Threat: A Silent Saboteur of Uptime

    While power grids struggle to keep up with demand, environmental factors are attacking the very machines designed to provide relief. Corrosion is a primary cause of HVAC failure, responsible for nearly 40% of equipment failures in industrial settings (CED Engineering).

    In data center hubs—ranging from the humid corridors of the East Coast to industrial zones in the Midwest—cooling coils are under constant attack from:

    • Salt Air & Humidity: Accelerating the oxidation of aluminum and copper.
    • Pollutants & “Electrolytes”: Gaseous contaminants that cause pitting and “formicary” corrosion, which can lead to refrigerant leaks and total system failure in less than a year.
    • Thermal Stress: Constant 24/7 operation at high loads accelerates the mechanical degradation of the bond between HVAC fins and tubes, reducing heat transfer by 15–20% over just five years (IRE Journals).

    Re-Engineering Resilience for the AI Boom

    To meet the goals of the “Americas-first” data center expansion, facilities must shift from a “replace-on-failure” mindset to a “protect-and-optimize” strategy. Coat Zone’s dual-coating approach provides a high-impact, low-cost shield for the infrastructure powering the AI boom:

    1. CoilSafe® & CoilSafe Plus® (Internal Protection): These ultra-thin (8–10 micron) inorganic coatings bond covalently to HVAC coils. Unlike traditional thick coatings, they do not impede heat exchange. By preventing corrosion and “fouling” (the buildup of dirt and microbes), CoilSafe can improve HVAC efficiency by up to 10% and maintain near-factory performance for the life of the unit.
    2. ThermalBlock™ (External Defense): Applied to exterior cabinets and rooftop ductwork, ThermalBlock acts as a radiant barrier that blocks up to 93% of solar heat. By keeping the unit’s cabinet temperature within 10°F of ambient air, it drastically reduces the “thermal load,” allowing the system to run less frequently and consuming significantly less kWh during peak demand.

    Sustaining the AI Boom with ROI

    As Business Facilities highlights, the Americas are leading the charge in capacity, but that leadership requires a foundation of efficiency. Integrating Coat Zone’s coatings can:

    • Reduce cooling energy consumption by 15–30%.
    • Extend the useful life of assets by 50% or more, deferring massive capital expenditures.
    • Deliver a rapid ROI, typically within 12 to 36 months.

    The future of AI is being built today. By protecting the cooling infrastructure that keeps these digital brains alive, Coat Zone is helping ensure that the surge in capacity is matched by a surge in resilience.

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