Surface galvanizing technology for guide hook of drop-out fuse

Abstract

The invention discloses a surface galvanizing technology for a guide hook of a drop-out fuse, comprising the following steps: 1) ungrease treatment; 2) cleanup acid treatment; 3) plating solubilizing assistant immersion; 4) drying prewarming; 5) hot galvanizing; 6) finishing cooling; and 7) passivating. According to the technology, a corrosion inhibitor is added to acid cleaning liquor so that the over corrosion when the guide hook is acid-cleaned can be prevented and the hydrogen absorption amount of an iron substrate is reduced; a small amount of glycerin is added to plating solubilizing assistant so that the activity of the surface of the guide hook can be promoted and the evaporation of the plating solubilizing assistant is reduced; and tiny metallic aluminium is added to galvanizing flux so that the flowing of the galvanizing flux can be strengthened, the over thickness of a cladding layer is prevented and the appearance of the cladding layer is improved. Through the technology, the guide hook of the drop-out fuse can achieve the cladding layer with good uniformity; the cladding layer is not easy to drop out and has good tenacity, elasticity, abrasion resistance and corrosion resistance; and the cladding layer is incapable of becoming rusty under outdoor conditions.

Description

technical field [0001] The invention relates to the field of surface treatment of metal products, in particular to a surface galvanizing process of a guide hook of a drop-out fuse. Background technique [0002] Drop-out fuse is the most commonly used short-circuit protection switch for branch lines of 10kV distribution lines and distribution transformers. It is widely used in 10kV distribution lines and the primary side of distribution transformers for protection and equipment switching and switching operations. [0003] Drop-out fuses are mainly suitable for outdoor places where the annual temperature difference ratio is within ±40°C. Due to the influence of outdoor climate, the damage of sun and rain, etc., its spare parts are required to have good wear resistance, corrosion resistance, rust and other characteristics. As the key part of the drop-out fuse, the guide hook is mainly used to limit the position of the fuse tube. Its quality determines the flexibility of the fu...

AI Technical Summary

Problems solved by technology

Although the existing treatment method can improve the corrosion resistance of the guide hook, its ability to adapt to the environment is poor, the galvanized layer is not uniform enough, easy to fall off, and the wear resistance has not been improved.

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