1.What is Q235 galvanized steel coil made of?
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. 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.
Galvanized coil with its ideal corrosion resistance, forming, electric welding and spraying and other comprehensive type than low cost, good appearance and other advantages, a large number of construction, car, household appliances and other manufacturing industries. Galvanized steel plate production will continue to emerge strip highlight, forehead wrinkles defects, harm the quality of the material, the use of customers, must be controlled.
The first strip highlighting: the appearance of the strip highlighting defect is described as a kind of strip spreading along the cold rolling, which looks similar to scratch defects. At different points, the number of defects in the strip highlighting is never liquid, so it has a great influence on the analog liquidity. The cause of the defect is due to material defects.
Second forehead wrinkle defect: Some of it resembles a crease on a person's forehead, hence the name forehead wrinkle. The hot dip galvanized whole plate contains the horizontal pattern defect and the fluidity of zinc liquid, and the colloid air mass produced in the process of re-quenching system are easy to lead to the continuous emergence of the forehead wrinkle defect of galvanized steel plate.
2.How are Q235 galvanized coils made?
Q235 galvanized coil is a thin steel plate immersed in melted zinc tank, so that its surface adhesion of a layer of zinc thin steel plate. The main use of continuous galvanizing process production, that is, into a roll of steel plate continuous dip in the melting of zinc plating tank made of galvanized steel plate; Alloyed galvanized steel sheet. This steel plate is also made by hot dip, but immediately after the trough, it is heated to about 500℃, so that it generates an alloy film of zinc and iron. This galvanized coil has good coating adhesion and weldability.
3.HDT tubing is a Q235 galvanized steel coil supplier with a factory
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The company has been adhering to the principle of quality first and service first for many years, providing high-quality steel for national key projects such as steel structure engineering, highway and railway construction, hydropower station, mine and plant reconstruction. Products are exported to Europe, The United States, the Middle East, Africa, Southeast Asia and other countries and regions, the annual sales of up to 60 million DOLLARS. In recent years, as a galvanized steel coil supplier, our company has become a strategic partner of Royal Dutch Shell oil Company, Russian Gazprom, Spanish Energy Group, Austrian Oil and Gas Group, French Saint-Gobain Group, French Bouyge Group, Swedish Skanska, Kajima Construction Co., Ltd. and fortune 500 enterprises. We uphold the customer-centric business philosophy, with quality products, thoughtful service, on time delivery to win the trust of customers. We sincerely welcome customers at home and abroad to visit us, seek common development and create brilliant! We are dedicated to provide you with 24 hours online service. If you buy our products, you will have a very good experience, it is a very right decision for you! Looking forward to your reply!