With the development of modern industry, various industrial sectors are increasingly demanding that mechanical equipment be able to withstand long-term high parameters (such as high temperature, high pressure, high speed, and high degree of automation) and harsh working conditions (such as severe wear and corrosion). Stable operation, therefore, need to improve the surface of the material corrosion resistance; wear resistance and heat resistance properties. The use of advanced alloy materials for the manufacture of integral equipment and components for surface protection and surface hardening is obviously uneconomical and sometimes impossible. Therefore, the surface treatment technology for research and development of materials has significant technical and economic significance. . As a new surface protection and surface hardening process, thermal spray technology has developed rapidly in the past ten years. Thermal spray technology has evolved from the early preparation of general protective coatings to the preparation of various functional coatings. From product maintenance to high-volume product manufacturing, from single coating development to thermal spray systems including product failure analysis, surface pretreatment, coating material and equipment selection, coating system design, and post coating addition Engineering: And this change was started by the relatively harsh and demanding aerospace industry, and then quickly expanded to the civil industry sector. The so-called thermal spraying technology is a technology for improving the properties of the base material, melting a spraying material with a certain heat source, and spraying the surface of the base material to form various coatings. Thermal spraying process has the following characteristics: (1) Coatings can be sprayed on various materials, such as metal, ceramic, glass, wood, plastic, gypsum, cloth and paper. (2) The materials that can be sprayed are very extensive, including almost all solid engineering materials, such as various metals, ceramics, plastics, metals, non-metallic minerals, and composite powder materials composed of these materials; (3) Using composite coating and other processes, two or more materials with distinct properties can be made into coatings with excellent comprehensive properties, such as corrosion resistance, abrasion resistance, heat and heat resistance, oxidation resistance, conductivity, and insulation. , sealing, energy saving, radiation and radiation protection and other special features of the coating; (4) Generally, it is not limited by the size of the workpiece to be sprayed and the construction site is limited, that is, it can spray a large area of ​​the surface of large components, and can also be sprayed on the designated local surface; either in the factory or in the outdoors Site construction, very flexible; (5) The thickness of the sprayed layer can be controlled, from tens of micrometers to a few millimeters, and less material is consumed, thus spending less money and yielding great results; (6) There are few procedures for spraying operations, spraying time is short, efficiency is high, and it is economical and easy to promote; (7) In the thermal spraying process, the degree of heating of the base material can be controlled. When plasma spraying, the temperature of the base material does not exceed 200°C. Therefore, the deformation of the matrix is ​​very small, and it has little effect on the organization of the matrix material; (8) The abrasion resistance of the spray coating is very high, and its hardness can be adjusted to a relatively high range depending on the type of material used; In modern industry, thermal spraying technology is gradually developing into an independent material processing technology such as casting, forging, welding and heat treatment. It becomes an industrial sector to save precious metal materials, save energy, improve product quality, extend product life, reduce costs, and improve work efficiency. The important process means. Thermal spraying has also been applied more and more in the manufacture of products and the repair of used products, achieving remarkable economic results. As an important aspect of thermal spraying, spraying zinc and cast alloy on the steel surface is a major means of corrosion resistance of the steel surface. Compared with electrogalvanizing and hot-dip galvanizing, the major advantage of hot-dip galvanizing is that it can be used for large-scale components that cannot be plated and hot-dipped, such as large bridges, iron towers, oil storage tanks, reservoir gates, sinks, and pipelines. Rails and structural parts and so on. All domestic and foreign data indicate that when the surface of the steel component is sprayed with a 0.2-0.3mm zinc coating and a closed layer is added, corrosion resistance can be 20-30 years in the atmosphere, clean water, and seawater. In recent years, with the application of cast aluminum alloys in hot dip coating, thermal spray zinc alloys have also been developed and gradually applied in foreign countries. Compared with pure zinc and zinc alloy, its corrosion resistance and the surface properties of the coating have been greatly improved, and the coating thickness is only half the original or even less than half, and its economic benefits are very significant. At present, foreign countries (mainly the United States, the United Kingdom, Canada, Mexico, and other countries) have led China in the thermal spray zinc-aluminum joint application. ZbAl15 zinc aluminum alloy wire has been developed and has begun large-scale application. At the same time, zinc aluminum alloy wire with high aluminum content (containing 20% ​​to 40% of aluminum) is being developed. In terms of theoretical research, although a lot of work has been done, the mechanism of the combination of thermal spraying has not yet been finalized. It is only at the hypothetical stage. At present, no report has been found on the research and application of germanium aluminum alloy wire.