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Oct 28, 2024
Hot dip galvanizing is a technology widely used in the surface treatment of steel parts, through the reaction of molten metal and iron substrate to form an alloy layer, so that the substrate and the coating are closely bonded.
Hot dip galvanizing is a technology widely used in the surface treatment of steel parts, through the reaction of molten metal and iron substrate to form an alloy layer, so that the substrate and the coating are closely bonded. The process first involves pickling steel parts to remove iron oxide from the surface. The parts are then cleaned in an aqueous solution of ammonium chloride or zinc chloride, or a mixture of these two chemicals. After completing these pre-treatment steps, the parts are fed into a hot-dip plating tank, where they react with the molten zinc to form a strong and durable galvanizing layer.
Width | 30-1500mm | |||
Thickness | 0.12-4.0mm | |||
Tolerance | Thickness& Width:+/-0.02mm | |||
Zinc coating | 30-275g/m2 | |||
Package weight | 2 -6 ton per coil | |||
Surface | Passivation,Fat liquoring,Stop-off lacquer | |||
Hardness | HRB50-71(CQ Grade),HRB45-55(DQ Grade) | |||
Tensile Strength | 270-500(CQ Grade),270-420(DQ Grade) | |||
Yield Strength | 140-300 (DQ Grade) | |||
Elongation Percentage | 22 (CQ Grade thickness less 0.7mm),24 (DQ Grade thickness less 0.7mm) | |||
Spangle coating | Big Spangle, small Spangle,Spangle-free | |||
Surface Treatment | Passivation(C),Oiling(O),Lacquer sealing(L),Phosphating(P),Untreated(U) | |||
Surface Structure | Normal spangle coating (NS),minimized spangle coating(MS),spangle-free(FS) | |||
Standard | EN 10142,EN 10147,EN 10292,JIS G3302, ASTM A653/A653M, BQB 420 | |||
Grade | Q195,Q235,Q235B,Q345,Q345B,SGCH,JIS G3302, ASTM A653,S280GD+Z, S350GD+Z,SGCC, DX51D/ DX52D, SGCC,DX51D+Z/ DX52D+Z | |||
Application | Building , Corrugated sheet Roofing, electrical, Appliances, Automobile industry, | |||
Packaging | Inside:Anti-rust paper,Plastic. | |||
Excellent corrosion resistance: Depending on different environmental conditions, hot dip galvanizing can provide corrosion protection for decades. For example, it can be maintained for about 13 years in heavy industrial areas, 50 years in Marine environments, and more than 104 years and 30 years in suburban and urban areas, respectively. This long-term effective protection is essential for extending the life of structural parts.
Cost effective: Compared to other types of coatings, hot dip galvanizing not only has a lower initial investment, but also reduces the need for maintenance replacement due to its excellent durability, thus reducing overall operating costs.
High reliability: The zinc coating is metallurgically bonded to the steel, rather than simply attached to the surface, which makes the entire system more stable and reliable. It can maintain good condition even in the face of adverse weather conditions or physical shocks.
Excellent toughness: The special metallurgical structure gives the galvanized layer good elasticity and strength, so that it can withstand various mechanical damage that may be encountered in the transportation process and actual use without breaking off.
Comprehensive coverage: Whether flat areas or hard-to-reach places such as depressions, sharp corners, etc., hot-dip galvanizing ensures that every corner is fully protected to avoid the risk of local corrosion.
High efficiency and energy saving: Compared to other traditional coating processes, hot dip galvanizing takes less time and consumes less energy, helping to improve production efficiency and reduce resource consumption.
In short, with the above many advantages, hot dip galvanizing has become one of the preferred surface treatment methods in many industries, especially in applications that require prolonged exposure and require high corrosion resistance.
