镁合金表面熔盐氧碳硫共渗耐腐蚀陶瓷涂层及制备和应用

Fused salt oxygen, carbon and sulfur co-cementation type corrosion-resistant ceramic coating of magnesium alloy surface as well asand preparation and application

Abstract

The invention relates to a processing technology of a magnesium alloy surface, and in particular relates to a fused salt oxygen, carbon and sulfur co-cementation type corrosion-resistant ceramic coating of the magnesium alloy surface and preparation and application thereof, aiming at solving the problem due to the corrosion resistance of a part manufactured from a magnesium alloy and overcoming the shortcoming that the inner hole of a deep hole in an irregular complex magnesium alloy part cannot be protected with a corrosion-resistant layer. The preparation comprises the following steps of: taking the magnesium alloy as a substrate material; and immersing a magnesium alloy part into a liquid oxygen, carbon and sulfur co-cementation solution to perform liquid oxygen, carbon and sulfur co-cementation treatment on the magnesium alloy surface, thus obtaining an oxidized ceramic coating with high corrosion resistance; the ceramic coating is uniform and dense in thickness, ranging from 10 to 60 microns. By adopting the fused salt oxygen, carbon and sulfur co-cementation type corrosion-resistant ceramic coating, the hardness as well as abrasion resistance of the magnetism alloy surface can be improved; the corrosion resistance of the magnesium alloy can be obviously improved; the fused salt oxygen, carbon and sulfur co-cementation type corrosion-resistant ceramic coating can be applied to functional treatment of the surfaces of a hub, a radiating fin and other parts manufactured from the magnesium alloy; in addition, the liquid oxygen, carbon and sulfur co-cementation solution isare simple in components, the raw materials are easy to getcarry out, and the industrial production can be performed.
本发明涉及镁合金表面处理技术,具体是一种镁合金表面熔盐氧碳硫共渗耐腐蚀陶瓷涂层及其制备和应用,解决镁合金制成的工件耐腐蚀的问题,并克服镁合金异形复杂件深孔内壁无法得到耐蚀层保护的缺点。以镁合金为基底材料,将镁合金工件浸入液体氧碳硫共渗溶液中,在镁合金表面上进行液体氧碳硫共渗处理,获得具有良好耐腐蚀性能的氧化陶瓷涂层,涂层厚度均匀致密,陶瓷涂层的厚度在10-60微米范围内。本发明不仅可以提高镁合金表面的硬度和耐磨性,而且能够显著改善镁合金的耐腐蚀性,应用于镁合金制成的轮毂、散热片等各种工件的表面功能性处理。另外,液体氧碳硫共渗溶液成分简单,原料易得,适合工业化生产。

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Cited By (1)

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    CN-105483684-AApril 13, 2016贵州航天风华精密设备有限公司Corrosion resistance processing method for surface of magnesium alloy or aluminum alloy