Title: analysis of aluminum alloy profile powder spraying technology Text: Powder spraying is a kind of surface treatment technology that has become popular in aluminum alloy profile industry in recent years. It has been widely used in many fields with its advantages of environmental protection, efficiency and aesthetics. This paper will briefly introduce the definition, process flow, material types and characteristics, technical requirements, common problems and solutions and future development of aluminum alloy profile powder spraying. First of all, powder spraying is a kind of surface treatment technology that USES electrostatic spray gun to spray powder coating on the surface of aluminum alloy profile. Powder spraying is widely used in construction, furniture, automobile, electronics and other industries, its application prospect is very broad. The process of powder spraying mainly includes: pretreatment, powder spraying, baking curing, cooling, post-treatment and other steps. In order to improve the adhesion of aluminum alloy profile surface, the common methods are alkali washing, pickling and phosphating. Powder spraying is the use of electrostatic spray gun to spray powder coating evenly to the aluminum alloy profile surface. Baking curing is to solidify the powder coating to form a coating at a certain temperature and time. The cooling is to cool the coating under natural conditions. Post-treatment is to improve the adhesion and corrosion resistance of the coating, and the common methods are grinding, polishing, coating varnish, etc. There are a variety of powder spraying materials, including epoxy resin powder, polyester powder, polyurethane powder and so on. These powder materials have different color, luster, hardness and other characteristics, can meet the needs of different fields. The characteristics of powder spraying materials are environmental protection, high efficiency, beautiful, corrosion resistance, wear resistance and so on. The technical requirements of powder spraying mainly include: particle size, electrostatic voltage, baking temperature, baking time and so on. These technical parameters have important influence on the adhesion, corrosion resistance and appearance of the coating. In the process of powder spraying, the common problems include uneven coating, peeling coating, foaming coating, color change and so on. Solving these problems usually requires comprehensive consideration from the aspects of powder selection, spraying equipment, baking equipment, technical level of operators and other aspects to find suitable solutions. The future development prospect of powder spraying in aluminum alloy profile industry is broad. With the continuous improvement of environmental protection requirements, powder spraying, as an environment-friendly surface treatment technology, will be paid more and more attention. At the same time, with the development of technology, the adhesion, corrosion resistance and appearance of powder spraying will be further improved, so that it can be applied in more fields.