The development of composite/nanocomposite coatings on various surfaces based on electroless process has much interest among researchers due to their enhanced mechanical, electrical, magnetic, and optical properties compared with their metallic or alloy counterparts. These coatings have shown many applications in automotive, aerospace and industrial fields with unique characteristics obtained by the incorporation of secondary particles as reinforcement at micro or nanoscale in the matrix. However, properties of the product depend upon not only the nature of secondary particle used but also the specific characteristics of the metal matrix. This paper critically reviews the recent developments in micro and nanostructured metallic composite coatings formed by electroless coating techniques and retrospect into the various mechanisms of the electroless coating process, its preparation with different metallic systems, properties, and applications in detail.

中文翻译：

---

化学镀金属复合涂层的评论

由于与金属或合金同类产品相比，其增强的机械，电，磁和光学性能，基于化学方法在各种表面上开发复合/纳米复合涂层引起了研究人员的极大兴趣。这些涂料在汽车，航空航天和工业领域已显示出许多应用，它们具有独特的特性，通过在基质中以微米或纳米级掺入次级颗粒作为增强剂。但是，产物的性质不仅取决于所用二次颗粒的性质，还取决于金属基质的具体特征。