How to understand the spray treatment of aluminum formwork

Aluminum formwork as an indispensable material in the modern construction industry, its quality and service life are directly related to the overall quality and safety of the building. As an important part of aluminum formwork processing, spraying treatment plays a vital role in improving the corrosion resistance, weather resistance and beauty of aluminum formwork. In this paper, the process flow, precautions and effect evaluation of aluminum template spraying treatment will be described in detail, aiming to provide readers with a comprehensive and practical aluminum template spraying treatment scheme.
First of all, we need to carry out adequate surface treatment of the aluminum template. Surface treatment is the key step of spraying treatment, which is directly related to the adhesion between the coating and the aluminum template. Common surface treatment methods include oil removal, pickling and phosphating. Oil removal is the use of chemical solvents or cleaning liquid to remove the oil on the surface of the aluminum plate to ensure that the sprayed coating can firmly adhere to the aluminum plate. Pickling is the use of acid solution to dissolve the oxide layer on the surface of the aluminum plate, and remove surface impurities, in order to improve the surface quality of the aluminum plate and the adhesion of the coating. Phosphating is to immerse the aluminum plate in a solution containing phosphate, so that a dense phosphating layer is formed on the surface of the aluminum plate, which enhances the binding force and corrosion resistance of the aluminum plate and the coating
After finishing the surface treatment, we need to primer the aluminum template. Primer is a key step in the aluminum plate spraying process technology, which is mainly used to provide a uniform layer of the bottom layer, enhance the adhesion between the coating and the aluminum plate, and improve the weather resistance of the coating. The primer is usually made of epoxy resin, acrylic resin and other materials, with good weather resistance and adhesion. When painting the primer, it is necessary to pay attention to the uniformity and thickness consistency of the coating to ensure the quality and stability of the coating.
The next step is to spray the paint. When spraying aluminum templates, we can use a variety of methods such as brush coating, spray and transfer. Among them, spraying is widely used because of its high efficiency and uniform characteristics. When spraying, the appropriate spray gun and nozzle should be selected, and the pressure of the spray gun and the Angle of the nozzle should be adjusted according to the viscosity of the paint and the construction requirements to obtain the best spraying effect. At the same time, it is necessary to maintain the appropriate spraying distance and spraying speed to ensure the uniformity and thickness of the coating.
After the completion of the first coat, it is necessary to wait for some time for the paint to dry to the degree of semi-dry, and then proceed to the second coat to increase the coating thickness and quality. In the coating process, attention should be paid to avoid defects such as coating flow and bubbles, to ensure the smoothness and beauty of the coating surface.
After spraying, the aluminum formwork needs to be dried and cured. This step is the key to drying the paint quickly and forming a strong protective layer. Usually, we can use an oven or ultraviolet irradiation equipment for drying and curing.