Traffic Signals Under Siege from Corrosion
Traffic lights are the unsung heroes of urban life, managing the chaos of daily commutes with unwavering precision. But while we rely on them without a second thought, they endure relentless exposure to the elements.
From punishing temperature swings to the corrosive effects of salt-laden snow, traffic signals face constant wear and tear that can lead to premature failures if left unchecked.
Corrosion, a silent but persistent foe, often begins as an innocuous scratch or moisture seepage. However, by taking proactive measures, maintenance teams can significantly extend the lifespan of traffic lights and their control systems, avoiding costly repairs and ensuring uninterrupted service. Here’s a closer look at practical solutions to combat corrosion and keep traffic flowing smoothly.
Guarding Traffic Signal Poles
Traffic signal poles are the front line against harsh weather conditions. Despite being coated with heavy-duty outdoor paints, even the smallest scratch during transportation or installation can expose the metal beneath. Once exposed, water, salt, and air team up to start a corrosive chain reaction. Over time, this can lead to structural damage, unsightly holes, and safety concerns.
Applying a clear protective layer over the original paint can serve as a first line of defence. EcoShield® VpCI®-386, a water-based protective coating, is a standout option. Easy to apply and highly effective, it forms a barrier against moisture and contaminants. Not only does this shield damaged areas, but it also reinforces the durability of the existing paint.
Maintenance crews should periodically inspect poles for signs of wear, such as flaking or loss of gloss, to determine when it’s time to reapply the coating. This preventative measure can significantly reduce repair frequency and long-term costs.
Safeguarding Traffic Signal Cabinets
Those silver cabinets perched near intersections might not look like much, but they house the critical controls that keep traffic signals running. Inside, wires, contacts, and battery backups are all vulnerable to corrosion caused by dampness, deicing salts, and temperature fluctuations.
A simple and cost-effective solution lies in Vapor phase Corrosion Inhibitors (VpCIs). Compact and easy to install, VpCI®-105 and VpCI®-111 Emitters release corrosion-inhibiting vapours through a breathable membrane. These vapours form an invisible molecular barrier over exposed metal surfaces, protecting against rust and corrosion.
Each emitter covers a specific volume—VpCI®-105 handles up to 5 cubic feet, while VpCI®-111 extends to 11 cubic feet. Depending on environmental factors, they typically need replacing every one to two years, offering an efficient way to maintain the integrity of traffic signal cabinets.
Why Preventative Maintenance Matters
Proactive corrosion management isn’t just about saving money—though it certainly helps. It’s also about maintaining safety and reliability. Traffic lights play an essential role in managing vehicle and pedestrian flows, and any disruption can lead to delays, accidents, or worse. By adopting preventative measures, municipalities and contractors can ensure these systems remain operational and resilient, even in the harshest environments.
Key Benefits of Corrosion Prevention:
- Reduced Downtime: Fewer unexpected failures mean smoother operations.
- Cost Savings: Lower repair and replacement costs over time.
- Enhanced Safety: Reliable signals reduce the risk of accidents at busy intersections.
Small Steps, Big Impact
Investing in protective coatings and VpCI emitters might seem like minor measures, but they can make a world of difference. By proactively shielding traffic poles and cabinets from corrosion, maintenance teams can extend equipment life, reduce long-term costs, and keep traffic moving without a hitch.
When it comes to combating corrosion, an ounce of prevention is worth a pound of cure. Cortec® provides the tools and expertise to help municipalities and contractors maintain robust traffic signal systems that stand the test of time. For tailored advice, reach out to Cortec® and signal an end to premature traffic signal failures.
