Dip coating

Hot dip aluminizing coating is one of the most effective methods of surface protection for steels and is gradually gaining popularity. Although the pulling speed is one of the most important parameters to control the coating thickness of aluminizing products, however, there are few publications on the mathematical modeling of pulling speed during the hot dip process. In order to describe the correlation among the pulling speed, coating thickness and solidification time, the principle of mass and heat transfer duringRead More …

Hot-dipped Zn55Al1.6Si galvalume coating has been widely used in many fields such as automobile industry, shipbuilding, machinery industry etc, owing not only to its better anti-corrosive performance than that of Zinc coating,but also to its low cost (the price of Al is lower than that of Zn at present). Rare earths such as La can hinder scale growth and increase scale adhesion, thus they have been employed to protect steels and other metallic alloys against oxidation and corrosion. However, thereRead More …

[State Zhejiang University, Hangzhou 310027, China] [Abstract]We report a new structure for broadband antireflection coating by dip-coating technique, which has minimal cost and is compatible with large-scale manufacturing. The coatings are prepared by depositing SiO2 sol-gel film on a glass substrate, subsequently depositing SiO2 single-layer particle coating through electrostatic attraction, and depositing a final very thin SiO2 sol-gel film to improve the mechanical strength of the whole coating structure. The refractive index of the structure changes gradually from the topRead More …

In a dip coating process, a substrate is dipped into a liquid coating solution and then is withdrawn from the solution at a controlled speed. Coating thickness generally increases with faster withdrawal speed. The thickness is determined by the balance of forces at the stagnation point on the liquid surface. A faster withdrawal speed pulls more fluid up onto the surface of the substrate before it has time to flow back down into the solution. The thickness is primarily affectedRead More …

(1)The thickness of the film decided to object to enhance the rate and the viscosity of the liquid paint. Control the viscosity of the liquid paint according to the above requirements, in accordance with the maximum degree in film 30um, depending on the equipment, experiments to determine the appropriate upgrade rate. Click here to enhance the rate evenly be coated object. Enhance the rate and thin film; enhance the rate is slow, the film is thick and uneven. (2)Dip coatingoperationRead More …