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垃圾焚烧厂工件表面通常暴露在含HCl/KCl的高温气氛中,这些高腐蚀性高温气氛是造成焚烧厂高额维护费用的主要原因。使用热喷涂技术对部件表面进行涂层防护可明显提高传统钢材的表面耐腐蚀性能。电弧喷涂由于其易于操作性和低成本,已成为最为成熟的技术之一。要得到可观的腐蚀防护能力,涂层必须有很高的致密度。因此,电弧喷涂必须做出适当调整以适应垃圾焚烧厂的特殊需求。虽然镍基合金和钴基合金代表了当今腐蚀防护的技术水平,但是这些合金非常昂贵。属于同一系列的铁基合金将成为一种经济效益更为可观的防腐蚀材料。最近的研究表明,与铁铬基合金和镍铬基合金相比,铁基合金中加入硅后其耐腐蚀性能得到显著提高。鉴于这一原因,本文开展了对不同成分的铁-铬-硅系合金的研究,重点讨论了该合金的最新研究结果。
The surface of the waste incineration plant is usually exposed to a high temperature atmosphere containing HCl / KCl, which is the main cause of the high maintenance costs of the incineration plant. The use of thermal spray coating on the surface of components can significantly improve the surface of traditional steel corrosion resistance. Arc spraying has become one of the most mature technologies due to its ease of operation and low cost. To obtain considerable corrosion protection, the coating must have a high density. Therefore, arc spraying must be properly adapted to the specific needs of the waste incineration plant. Although nickel-based alloys and cobalt-based alloys represent the state of the art of corrosion protection today, these alloys are very expensive. Iron-based alloys belonging to the same family will become a more cost-effective anti-corrosion material. Recent studies have shown that the corrosion resistance of Fe-based alloys is significantly improved when compared to Fe-Cr-based and Ni-Cr-based alloys. For this reason, this article has carried on the research to the iron-chromium-silicon alloy with different compositions, and focuses on the latest research results of the alloy.