Corrosion-resistant flexible graphite down lead and preparation method thereof

Abstract

The invention relates to a corrosion-resistant flexible graphite down lead and a preparation method thereof. A corrosive medium in the atmosphere can be effectively prevented or delayed from enteringa metal-graphite interface by a stainless steel connecting piece with a semi-sealed structure, a heat-shrinkable insulating sleeve completely wraps the part, except the connecting end, of the flexiblegraphite body, entering of the corrosive medium in the atmosphere and soil can be effectively isolated, local corrosion can be blocked due to lack of the corrosive medium, and long-term effective electrical connection is guaranteed. The flexible graphite body contains a water-soluble corrosion inhibitor, so that even if water and the corrosive medium enter when the sealed structure has defects, the added corrosion inhibitor can passivate the surface of the metal and form a film on the surface to prevent cations on the surface of the metal from diffusing into the corrosive medium, or characteristic adsorption in the anode area, the anode surface area is reduced, and the anode inhibition type corrosion inhibitor increases anode polarization, so that the self corrosion potential of the metalelectrode moves to a positive direction, the corrosion current density is reduced, corrosion is slowed down, and effective electrical connection is ensured.

Description

technical field [0001] The invention belongs to the technical field of down conductors, and in particular relates to a corrosion-resistant flexible graphite down conductor and a preparation method thereof. Background technique [0002] The down conductor in the grounding grid plays the role of electrical connection between the protected equipment and the grounding grid. When the conductivity of the grounding down conductor changes, it will directly affect the functional realization of the grounding grid. At present, most of the grounding down conductors are made of galvanized steel and copper-plated steel. Generally, the design service life of the grounding grid is 20-30 years. In the long-term use process, the corrosion problem of the grounding down-conductor made of galvanized steel and copper-plated steel will reduce its discharge function for lightning current. risk of accidents. [0003] Flexible graphite down conductors are popularized as a grounding device with stro...

AI Technical Summary

Problems solved by technology

[0004] The corrosion of the contact surface between metal and graphite will lead to the deterioration of the electrical connection between metal and graphite, which will affect the function of the discharge channel of the down conductor

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