Common size on stock, Special sizes needs new production.Can cut to Size, Cut to Shape.
EMERSONMETAL
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The production process of galvanised coils consists of the following main steps:
Raw material preparation:
Usually cold rolled coils or hot rolled coils are used as raw materials, these raw material coils need to undergo strict quality inspection to ensure that the surface is free from defects.
Pickling:
Remove oxidation and rust from the steel surface by pickling to ensure that the galvanised layer adheres evenly. Commonly used pickling methods include sulphuric acid pickling and hydrochloric acid pickling.
Pretreatment:
After pickling, the steel needs to be pre-treated, such as washing, passivation, etc., in order to remove the residual acid and impurities on the surface.
Galvanising:
Galvanising is the core part of the whole production process and there are two main methods:
Hot dip galvanising: steel is immersed in a molten zinc solution, which causes a chemical reaction between the zinc solution and the surface of the steel to form a uniform layer of zinc. The thickness of the hot-dip galvanised layer is generally between 30 and 100 microns.
Electro-galvanising: Zinc ions are reduced and deposited on the surface of the steel by electrochemical methods to form a thin, uniform layer of zinc. The thickness of the electro-galvanised layer is generally between 5 and 20 microns.
Post-treatment:
After zinc plating, steel requires post-treatment, such as passivation and oiling, to improve the corrosion resistance and adhesion of the zinc layer.
Finishing:
This includes processes such as levelling, trimming, coiling and packaging to ensure that the product meets user requirements.
Application areas for galvanised coils：
Construction industry: Used in building roofs, walls, door and window frames, railings and other components, it can effectively prevent steel from rusting and prolong its service life.
Automobile manufacturing: used in automobile body, chassis parts, etc., to improve the corrosion resistance and service life of the car.
Home appliance industry: used in the shell of refrigerators, washing machines, air conditioners and other home appliances, to improve the aesthetics and durability of the product.
Electronics industry: used in the shell and internal structural parts of electronic equipment to prevent moisture damage to electronic components.
Agriculture and livestock industry: used in the manufacture of agricultural machinery, animal houses, etc., to improve the corrosion resistance and service life of the equipment.
