Hot-dip galvanizing,also known as hot-dip galvanized,it is an effective metal anti-corrosion method and is mainly used in metal structure facilities in various industries.The rust-removed steel is immersed in a zinc solution melted at about 500 ° C to adhere the zinc layer to the surface of the steel member,thereby preventing corrosion.

Been widely used in power tower, communication tower, railway, road protection,light poles,marine components, construction steel structure components,substation ancillary facilities, light industry.

The anti-corrosion years of hot-dip galvanizing are long-term,but the years of anti-corrosion are different in different environments: 13 years in heavy industry,50 years in the ocean,104 years in the suburbs,and 30 years in the city.

Galvanized BS4504 plate flanges

Principle of hot dip galvanizing:

The iron parts are cleaned, then treated with solvent, dried and then immersed in zinc liquid. The iron reacts with the molten zinc to form an alloyed zinc layer. The process is: degreasing – washing – pickling – plating – drying – hot dip galvanizing – separation – cooling passivation.

The thickness of the hot-dip galvanized alloy layer mainly depends on the chemical composition such as the silicon content of the steel, the cross-sectional area of the steel, the roughness of the steel surface, the temperature of the zinc pot, the zinc immersion time, the cooling speed, and the cold rolling deformation.

Inspection of butt welding reducing tees hot dip galvanized coating

Process of hot dip galvanizing steel pipe:

Material Inspection (Steel Pipe) — Hanging — De-greasing — Rinsing — Pickling — Washing — Dipping Fluxing — Hot Air Drying — Inside and Outside Hot-dipped Galvanizing Blow — Cooling — Passivation and Rising — Unloading — Inspection and Trimming — Type Identification — Packaging and Storing and Transportation.

Hot dip galvanizing malleable iran 90 degree elbows

Advantage of hot dip galvanizing:

• Low processing cost: the cost of hot dip galvanizing rust is lower than that of other paint coatings;
• Durable: In the suburban environment, the standard hot-dip galvanizing rust thickness can be maintained for more than 50 years without repairing; in urban or offshore areas, the standard hot-dip galvanizing rust layer can be maintained for 20 years. No need to mend;
• Good reliability: the galvanized layer and the steel are metallurgically combined and become a part of the steel surface, so the durability of the coating is relatively reliable;
• Strong toughness of the coating: The galvanized layer forms a special metallurgical structure that can withstand mechanical damage during transportation and use;
• Comprehensive protection: each part of the plated parts can be plated with zinc, even in the depressions, sharp corners and hidden places can be fully protected;
• Save time and effort: galvanizing process is faster than other coating construction methods, and can avoid the time required to paint on the construction site after installation;

Hot dip galvanizing malleable iran equal tees

Haihao Group can produce a variety of galvanizing steel pipes,galvanizing pipe fittings and galvanizing flanges,covering multiple standards to meet customer needs,The picture is our company’s galvanized elbows,tees,caps and flanges.If necessary, please feel free to contact us:sales@haihaogroup.com