Continuous Hot-Dip Galvanized Rare-Earth Alloy Coated Steel Strip and Steel Sheet
Continuous hot-dip galvanized rare-earth alloy coated steel strip and steel sheet, also known as hot-dip aluminized rare-earth alloy coated steel strip and steel sheet, refer to a steel strip or sheet substrate coated with a zinc-aluminum-rare-earth alloy composed of a zinc-aluminum-rare-earth alloy material by hot-dip plating, and continuously galvanized with a zinc-aluminum-rare-earth alloy material. This kind of steel strips and sheets usually uses cold rolled non-oriented fully annealed low-alloy magnetic strip or cold rolled non-oriented fully annealed sending strip as its basis materials, it has a high strength, good plasticity, and is resistant to corrosion. It is widely used in electric machinery, household appliances, cars, and other fields.
The aluminum-zinc-rare earth alloy used for continuous hot-dip galvanized rare-earth alloy coated steel strip and steel sheet is aluminum-zinc-rare-earth alloy, and its composition consists of aluminum, zinc, and rare-earth elements. The general chemical formula is AlZnRE, where RE refers to a combination of rare-earth elements, while the actual composition varies depending on the type of material used. The chemical composition of this alloy is balanced, which improves its corrosion resistance and mechanical properties.
Commonly used rare-earth elements include cerium, yttrium, neodymium, dysprosium, erbium, samarium, europium, and the like, and the total content of rare earth elements is usually between 1% and 12%. The aluminum-zinc-rare earth alloy has an aluminum content of 28-60%, a zinc content of 3.0-15%, and a rare earth content of 1-12%. During the continuous hot-dip galvanizing process, a zinc-aluminum-rare-earth alloy material is applied to both the top and bottom surfaces, forming a layer of rusty gray alloy coating on both surfaces, which protects the materials from rust and corrosion.
The production process of continuous hot-dip galvanized rare-earth alloy coated steel strip and steel sheet generally consists of four steps: pickling, rinsing, hot-dip galvanizing and passivation. First, the steel sheet is degreased and pickled to remove rust and other impurities. Then, the sheet is rinsed to remove the residues after pickling. After that, it is hot-dip galvanized with a zinc-aluminum-rare earth alloy material to form the alloy coating, and finally passivated to improve the corrosion resistance of the coating.
Continuous hot-dip galvanized rare-earth alloy coated steel strip and steel sheet has many advantages, such as good corrosion resistance, excellent weldability, and good forming ability. At the same time, due to the protective effect of the alloy coating, the service life of the product is significantly improved and maintenance costs are reduced. Meanwhile, due to its anti-corrosive nature, the product is also a good choice for electric machinery, household appliances, cars and other fields.
Continuous hot-dip galvanized rare-earth alloy coated steel strip and steel sheet is manufactured according to the national standard YB/T052-1993. In order to meet the quality requirements, the width and thickness range of the product is strictly controlled, and the surface quality and chemical composition of the product must also meet the regulations. At the same time, the products must be tested for mechanical properties, surface quality, and other indicators according to the relevant specifications.
Continuous hot-dip galvanized rare-earth alloy coated steel strip and steel sheet is widely used in the production of electric motors, household appliances, cars and other products due to its anti-corrosive nature, forming ability and good weldability. It has become an essential material for modern industrial production.
