The most widely used steel materials in the industry will corrode to varying degrees when used in environments such as atmosphere, seawater, soil and building materials. According to statistics, the world’s annual loss of steel materials due to corrosion accounts for about 1/3 of its total production. In order to ensure the normal use of steel products and prolong their service life, the anti-corrosion protection technology of steel has always received widespread attention.
Pre-galvanized
The processing technology of pre-galvanized steel pipe differs from that of hot-dip galvanizing mainly in the raw materials used. The raw materials of pre-galvanized steel pipes are mainly galvanized steel coils, which are mainly produced by continuous galvanizing process, that is, galvanized coils are made by continuously immersing coiled steel plates in a plating tank with molten zinc. After the factory processes the galvanized coil into a steel pipe, it is no longer necessary to galvanize again, and it is only necessary to supplement zinc on the welded part. The advantage of pre-galvanizing is that the zinc layer is more uniform and the appearance is more beautiful. The pre-galvanizing process is favored by people because of its low plating cost, excellent protection properties and beautiful appearance, and is widely used in construction, machinery, solar energy and other fields.
Hot dip galvanized
Hot-dip galvanizing is one of the most effective means to delay the environmental corrosion of iron and steel materials. It is to immerse the iron and steel products whose surfaces have been cleaned and activated in molten zinc solution. The surface is coated with a zinc alloy coating with good adhesion. Compared with other metal protection methods, the hot-dip galvanizing process has the protection characteristics of the combination of the physical barrier and electrochemical protection of the coating, the bonding strength of the coating and the substrate, the compactness, durability, maintenance-free and economical of the coating. It has unparalleled advantages in terms of performance and adaptability to the shape and size of products.
Post time: Jun-29-2022