Method and device for vacuum hot dip aluminum or aluminum alloy plating for metal workpiece

A metal workpiece, hot-dip aluminum plating technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problems affecting surface quality and corrosion resistance, can not stop production at any time, high process requirements, achieve Avoid surface oxidation problems, increase interface bonding force, and improve the effect of coating quality
CN103243286AInactive Publication Date: 2013-08-14UNIV OF SCI & TECH LIAONING
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
UNIV OF SCI & TECH LIAONING
Publication Date
2013-08-14
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a method and a device for vacuum hot dip aluminum or aluminum alloy plating for a metal workpiece, which can effectively prolong the service life of the metal workpiece. The method comprises the following steps of: loading, vacuumizing for furnace sweeping, carrying out metal workpiece reduction, melting molten aluminum, carrying out hot dip aluminum or aluminum alloy plating, cooling the metal workpiece and taking out the metal workpiece. The device comprises a vacuum pump, a reversing valve, a reduction furnace exhaust pipe, a cooling furnace exhaust pipe, an inlet valve, a cooling water outlet, connection bolts, a winding motor, a steel wire rope, a feeding mechanism, a charging tray, an upper vent valve, a cooling furnace, a cooling wall, a cooling water inlet, a sealing valve cover, a driving rotation shaft, a reduction furnace, a heating element, a reduction furnace insulating layer, a lower vent valve, molten aluminum, an aluminum melting furnace, a heater and an molten aluminum melting furnace insulating layer. By the method and the device provided by the invention, the defect of plating omission can be removed, and the dip plating speed is increased; in the dip plating process, anti-oxidation treatment and degassing treatment can be carried out for the plating solution in vacuum condition, the defects, such as a pin hole and accretion, are eliminated, and the dip plating quality is improved.
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Description

technical field

[0001] The invention relates to the technical field of metal material surface coating, in particular to a method and a device for vacuum hot-dipping aluminum or aluminum alloy coating on a metal workpiece. Background technique

[0002] Hot-dip aluminum or aluminum alloy coating on the surface of metal workpieces is one of the effective ways to prevent corrosion and prolong the service life of metal workpieces. At present, there are many methods for hot-dip aluminum or aluminum alloy coating, but there are two main methods: gas protection method and solvent method. kind. Patent documents CN1020928C, AU696077B1, EP0698671A1, EP0467749A1, KR2007 / 006720, etc. have provided the technology of continuous hot-dip aluminum and aluminum alloy plating by gas protection method, but this method is only suitable for large-scale continuous production of a single product, such as Sendzimir method, improved Sendzimir Such methods require large equipment investment, high proc...

Claims

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