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Category: Corrosion

  • 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.