Views:0 Author:Murphy Publish Time: 2021-09-11 Origin:Site
The surface treatment of VAN’s bicycle parking racks are powder coating,stainless steel and galavnized. Powder coating as a rust prevention measure, it also has a beautiful appearance and protects the bike rack to be used outdoors for more than 5 years. Through galvanizing as an anti-rust measure, the outdoor bike racks can be protected from normal use for more than 5 years. Stainless steel materials can effectively prevent corrosion and rust. Through polishing and brushing, the surface of the bike rack is smoother and more beautiful.
Galvanized refers to the surface treatment technology of plating a layer of zinc on the surface of metal, alloy or other materials in order to play the role of beauty and rust prevention. The main method used is hot dip galvanizing.
Galvanizing process is mainly hot dip galvanizing and cold galvanizing. Cold galvanizing is also called electric galvanizing.
With the development of galvanizing technology and the use of high performance galvanizing brightener, galvanizing has entered the protection - decorative application from the pure purpose of protection.
Zinc is soluble in both acids and bases, so it is called a amphoteric metal. Zinc hardly changes in dry air. In humid air, a dense alkaline zinc carbonate film is formed on the surface of zinc. In the atmosphere of sulfur dioxide, hydrogen sulfide and Marine, zinc corrosion resistance is poor, especially in the atmosphere of high temperature and high humidity containing organic acids, zinc coating is easy to be corroded. The standard electrode potential of zinc is -0.76V, for the steel matrix, zinc coating belongs to the anode coating, it is mainly used to prevent the corrosion of steel, its protective performance and the thickness of the coating has a great relationship. The protective and decorative properties of zinc coating can be significantly improved after passivation treatment, dyeing or coating with gloss agent.
Cold galvanizing is also called the electric galvanized, it is using electrolytic equipment fitting after degreasing, pickling, into the composition of zinc salt in the solution, and connect the cathode electrolytic equipment, across the tube placed zinc plate, connected to the anode electrolytic equipment, power supply is connected using current from the positive to the negative directional moving deposits a layer of zinc on the pipe fittings, cold is plated fittings galvanized after processing.
Hot-dip galvanizing is developed by the older hot-dip galvanizing method, since the French hot-dip galvanizing was applied to industry in 1836, there have been 170 years of history. However, with the rapid development of cold rolled strip steel, the hot dip galvanizing industry has been developed on a large scale in the past thirty years.
The production process of hot galvanized plate mainly includes: preparation of the original plate → pretreatment of plating → hot dip plating → post-treatment of plating → finished product inspection.