Difference between hot dip galvanizing and cold galvanizing

DATE:7/30/2019 HIT:78 SOURCE: AUTHOR:

Difference between hot dip galvanizing and cold galvanizing

Difference between hot dip galvanizing and cold galvanizing


1. The principle of different

Hot dip galvanizing: Immerse the steel device in molten zinc to obtain a metal coating.

Cold galvanizing: After the processed steel device is degreased, pickled, and put into a solution of zinc salt, after connecting the electrolysis device, a layer of zinc is deposited on the steel device by electrochemical principle.

2. Different equipment required

Hot dip galvanizing line: Pickling equipment, bottom annealing furnace or hood annealing furnace.

Cold galvanizing line: Electrolysis machine.

3. Different performance and advantages

Hot dip galvanizing: Durable anti-corrosion, standard quality of hot dip galvanized rust thickness makes it has excellent durability; The coating toughness is strong, hot dip galvanized galvanized layer formation of a unique smelting metal structure, this metal structure can withstand the mechanical damage during transportation and use.

Cold galvanizing: It has excellent environmental protection performance.

Most cold galvanizing solvents and diluents do not contain toxic organic solvents, and the process of cold galvanizing also reduces the volatilization of organic solvents, reduces the energy consumption of drying, and is beneficial to environmental protection.

4. Different application

Hot dip galvanizing: Due to its good anti-corrosion properties, hot-dip galvanizing is widely used in electric power towers, communication towers, railways, highway protection, street light poles, marine components, building steel structural members, substation ancillary facilities, light industry, etc.

Cold galvanizing: Cold galvanizing is the main development direction of environmental protection for heavy-duty coatings.