What is the difference between hot-dip galvanizing and cold galvanizing?

 I. Different principles

Hot-dip galvanizing: The principle is to dip the steel device into the molten zinc solution to obtain a metallic coating.

Cold galvanizing: The principle is to put the processed steel devices into the solution of zinc salt after degreasing and pickling, and then deposit a layer of zinc on the steel devices by using the electrochemical principle after connecting the electrolytic equipment.

II. The different equipment required

Hot-dip galvanizing: pickling equipment, bottom-type annealing furnace or hood-type annealing furnace.

Cold galvanizing: electrolytic equipment.

III. The performance and advantages of different

Hot-dip galvanizing: durable anti-corrosion, standard quality hot-dip galvanizing rust thickness makes it has excellent durability; coating toughness, hot-dip galvanizing galvanized layer to form a unique smelting of the metal structure, this metal structure can withstand in the delivery and use of the mechanical damage.

Cold-dip galvanizing: has excellent environmental properties. The vast majority of cold galvanizing solvents and diluents do not contain toxic organic solvents, and cold galvanizing process also reduces the amount of organic solvents volatile, reduce drying energy consumption, conducive to environmental protection.

IV. The application of different

Hot-dip galvanizing: due to good anti-corrosion properties, hot-dip galvanizing is widely used in electric power pylons, communication pylons, railroads, highway protection, street lamp poles, marine components, building steel structure components, substation ancillary facilities, light industry.

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

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