The Impact Of Bolt Corrosion On The Performance Of Copper Terminal Blocks
Metal bolts corrode at a significantly faster rate in humid or chemically corrosive environments, leading to a decrease in contact pressure and weakening the electrical connection stability of copper terminal block. Over the long term, this increases contact resistance, raises system failure rates, and poses a threat to equipment operational safety.
Microscopic Effects of Bolt Corrosion
An oxide layer forms on the bolt surface, causing localized stress concentration and uneven stress on the copper terminal block.
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Contact Surface Corrosion: Bolt corrosion creates gaps between the threads and the terminal contact surface, affecting the conductivity of the copper terminal block.
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Resistance Changes: Corrosion products have low conductivity, increasing the contact resistance at the copper terminal block contact points and increasing energy loss.
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Heat Accumulation: Localized high resistance generates heat, and over time, the metal structure of the copper terminal block may undergo micro-deformation or fatigue.
Long-term operational risks
Accelerated bolt corrosion; copper distribution block bolts are more prone to poor contact and localized overheating under high load conditions. Extended maintenance cycles increase repair difficulty and raise the overall operational risk of the electrical system. The interaction between copper terminal strip and the bolt not only affects the conductivity but also directly relates to the long-term reliability of the equipment.
