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Materials and Anti-Corrosion Techniques for Power Fittings

2025-09-15

Since the hardware has been exposed outdoors for extended periods, enduring challenges from wind, rain, sunlight, temperature fluctuations, as well as complex environmental factors such as industrial pollution and salt spray, it places high demands on the material's mechanical properties and corrosion resistance.
Materials and Anti-Corrosion Techniques for Power Fittings

The long-term reliability of power hardware fittings is closely linked to the materials used and the corrosion protection processes applied. Since these fittings are exposed outdoors for extended periods, enduring challenges from wind, rain, sunlight, temperature fluctuations, as well as complex environmental factors like industrial pollution and salt spray, they place high demands on both the mechanical properties of their materials and their corrosion-resistant capabilities.

Currently, power line hardware is primarily manufactured using materials such as malleable cast iron, carbon structural steel, and aluminum alloys. Malleable cast iron and carbon structural steel offer high strength, excellent casting properties, and relatively low costs, making them widely applicable. Aluminum alloy hardware, on the other hand, is favored for its lightweight nature and superior corrosion resistance, leading to its use in specific applications. To address corrosion issues, the surfaces of hardware components typically undergo anti-corrosion treatments. Hot-dip galvanizing is a common and highly effective method, forming a dense zinc coating on the steel surface that provides both a physical barrier and cathodic protection. In areas with more severe corrosive environments—such as coastal regions or industrial zones—engineers often apply thicker galvanized layers or implement additional corrosion-resistant measures. Furthermore, some hardware components are also treated with techniques like tin plating or epoxy resin coatings to meet specialized electrical or anti-corrosion requirements. Rigorous quality control and proper anti-corrosion treatment are essential to ensure the hardware functions reliably throughout its designed service life.

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Basic Classification and Functions of Power Fittings

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Selection and Installation Considerations for Power Fittings