Cradle to Consumer
Identity ID
998eb6cb-dcf3-48cc-8d9e-e8e59023c28f
Materials
Associated ID
e01647a8-9708-47b0-b59b-b2436d870c21
Included activities starts
Included activities ends
Description
This is a market dataset representing the consumption market in the region. It includes transportation of the product from the factory gate to consumption, with transport services calculated according to the regional transportation conditions for the product.
Activity Description
The production process of hot-dip galvanized steel coils includes pretreatment of cold-rolled hard coils, hot-dip galvanizing, cooling, leveling, cutting, and packaging, covering energy consumption, material consumption, waste treatment, and environmental emissions required during the production process.
Process Description
Q235B carbon steel hot-dip galvanized coil is a carbon structural steel material treated by the hot-dip galvanizing process. Q235B is a grade specified in the Chinese standard GB/T 700, referring to low-carbon steel with good ductility, toughness, and weldability. Hot-dip galvanizing involves immersing the Q235B carbon steel coil into molten zinc to form a tightly bonded zinc coating on its surface. This zinc layer not only effectively protects the steel against corrosion but also provides certain wear resistance and impact resistance. This protective mechanism of hot-dip galvanized coils is especially suitable for outdoor or corrosion-prone environments, such as in construction, automotive, bridges, electrical facilities, and various other industrial structures.
Time period
2021
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
This technology is an efficient steel processing method that combines two key steps--annealing and galvanization--to produce galvanized steel with excellent corrosion resistance and good mechanical properties. The cold-rolled hard coil is heated to a specific temperature and then slowly cooled in a controlled environment to improve the steel's mechanical and processing properties. The annealing process relieves internal stresses in the steel, making the material softer and easier to process. This is followed by the galvanization process, in which the steel is immersed into molten zinc. This step forms a zinc coating on the steel surface, providing protection against corrosion. Before galvanizing, the steel surface must be thoroughly cleaned to ensure uniform adhesion of the zinc coating. After galvanizing, the steel coils are cooled and undergo surface treatments (such as passivation or application of rust-preventive oil) to further enhance their corrosion resistance and surface quality. Finally, the annealed and galvanized steel coils undergo quality inspection to ensure they meet specific standards, followed by recoiling and packaging for subsequent use or processing. The raw material for hot dip galvanized coils is processed from products of short-route steelmaking.