Thin steel plates with a thickness of 0.3-3.0mm coated with zinc (or zinc alloy) on the surface are a major surface protection metallurgical product. It has excellent resistance to atmospheric corrosion. The zinc layer can form a corrosion-resistant protective film on its surface in the atmospheric environment, protecting the internal steel substrate. Moreover, as an anodic coating, zinc can provide cathodic protection to the steel substrate, comprehensively extending the service life of the steel plate. In addition, the galvanized layer also has an aesthetic and decorative effect. Galvanized steel plates are widely used in construction, vehicles, electrical equipment, household appliances, and various daily necessities. Galvanized steel plates have two production processes: hot-dip galvanizing and electroplating, with different product varieties. Hot dip galvanized steel plates were first manufactured using the flux method in Europe in the early 19th century. In the 20th century, with the advancement of cold rolling production technology for strip steel, T. Sendzimir, a Polish man, invented the decomposition ammonia protection gas reduction method for continuous hot-dip galvanizing of strip steel by combining annealing and hot-dip galvanizing processes in 1927, which improved product quality and production efficiency. Subsequently, the production of hot-dip galvanized steel sheets rapidly developed based on this process. The international regulations for the variety and specifications of hot-dip galvanized steel plates are generally the same. According to the galvanizing amount, the supply is divided into 6 levels within the range of 120-610g/m2 (expressed as the sum of galvanizing amounts on both sides). According to the mechanical performance classification, there are varieties such as ordinary grade, stamping processing grade, deep drawing grade, and high-strength grade. According to the shape of surface zinc flowers, there are ordinary zinc flowers, small zinc flowers, and zinc free flowers. According to the post plating treatment, there are chromate passivation treatment, phosphate treatment, oil coating treatment, etc., or processed by a flat or polished machine after plating. There is also a variety called alloyed hot-dip galvanized steel sheet (US trademark Galvaneal), which is processed by an online alloying heating furnace after hot-dip galvanizing, transforming the galvanized layer into a zinc iron alloy layer containing about 10% iron, with better corrosion resistance and coating properties, suitable for the specific needs of certain users. Some production lines also have varieties of single-sided hot-dip galvanized steel plates, which are not common due to the complex production process. To further improve the corrosion resistance of hot-dip galvanized steel plates, various types of zinc aluminum alloy hot-dip galvanized steel plates have been developed, including two mature ones that can be produced on slightly modified hot-dip coating production lines- This is an aluminum zinc alloy coated steel plate developed by Bethlehem Steel Company in 1972, with a coating composition of 55% Al-43.5% Zn-1.5% Si, and the US trademark name Galvalume. Its salt spray test corrosion resistance life is 2-4 times that of hot-dip galvanized steel plate. Another type is the zinc aluminum alloy coated steel plate developed by the International Lead Zinc Research Organization (ILZRO) based in the United States in 1981. The coating consists of a zinc-5% aluminum alloy containing 0.1% cerium lanthanum mixed rare earth elements, with the international trademark name Galfan. Its salt spray test corrosion resistance life is 2-3 times that of hot-dip galvanized steel plate. Its unique feature is that there is no brittle alloy layer between the coating and the steel plate substrate, so it has better formability and coating properties. The production and application of these two products are gradually being promoted. The production of electroplated galvanized steel plates using strip steel continuous electroplating method began in the 1930s and only developed after the 1960s. In the mid-1980s, production doubled mainly due to the demand of the automotive industry. Compared with hot-dip galvanized steel sheet, the characteristic of electroplated galvanized steel sheet is that the coating is thin and uniform, the surface is flat without zinc flowers, so it looks more beautiful after painting than hot-dip galvanized steel sheet. However, due to the thin coating, its corrosion resistance is not as good as hot-dip galvanized products. This steel plate is usually suitable for applications that require surface painting for protection and decoration, such as automobiles, household appliances, office automation equipment, and components used in indoor environments. The variety and specifications of galvanized steel plates are also international. According to the galvanizing amount, due to the ease of producing single-sided coatings and double-sided differential thickness coatings by electroplating method, they are all expressed as single-sided galvanizing amount, divided into 6 grades of 3, 10, 20, 30, 40, and 50g/m2 within the range of 3-50g/m2, combined to form double-sided equal thickness, differential thickness, or single-sided coatings. According to the mechanical properties, as the electroplating process is produced by cold method, the original mechanical properties of the strip steel remain unchanged, so there are more types of performance than hot-dip galvanized steel plates, which can be supplied according to the performance types of cold-rolled steel plates. According to post plating treatment, there are various types such as phosphate treatment, chromate treatment, special chromate treatment, oil coating or no treatment. The direction for improving the performance of electroplated galvanized steel plates is electroplated galvanized alloys, among which the most mature is electroplated galvanized nickel alloy (containing 10% to 15% nickel) steel plates, whose salt spray test corrosion resistance life is 4 to 5 times that of electroplated galvanized steel plates. This type of electroplated zinc nickel alloy steel plate was developed in the early 1980s to meet the demand of the automotive industry to extend the corrosion resistance life of car bodies. It was put into production in Japan, the United States, and Germany in the mid-1980s, and most of the newly built electroplated zinc steel plate production lines in these countries were also multifunctional production lines for galvanizing and galvanizing nickel alloy. Due to the fact that most electroplated zinc steel plates are used after painting, some newly built electroplated zinc production lines have added online organic coating devices after the galvanizing section, directly producing products with galvanized layers and organic coatings, which are called a new type of organic composite coated steel plate. This variety has additional comprehensive properties such as fingerprint resistance, self-lubricating properties, and better coating properties, which meet the diverse needs of industrial sectors such as automobiles and home appliances. The production of electroplated galvanized steel sheets will develop towards alloying, multilayering, and compounding in the future.