Environmental characteristics of aluminum-zinc plated steel and its contribution to carbon emission reduction

The production process of aluminum-zinc coated steel sheets aligns with green manufacturing trends: Firstly, the hot-dip galvanizing process uses a closed-loop system, achieving a recovery rate of over 98% for the aluminum-zinc molten liquid, reducing metal resource consumption; secondly, aluminum in the coating can replace part of the chrome plating passivator, lowering the risk of heavy metal pollution; thirdly, the high-reflective surface reduces urban heat island effect, indirectly lowering air conditioning energy consumption. According to calculations, a square meter of aluminum-zinc coated steel sheet roof can reduce carbon dioxide emissions by 12kg annually (equivalent to planting 0.5 trees). Under the EU carbon tariff policy, building products using aluminum-zinc coated steel sheets can receive carbon credit rewards, significantly enhancing export competitiveness. Additionally, the lightweight characteristic of aluminum-zinc coated steel sheets reduces transportation energy consumption—taking auto parts as an example, using aluminum-zinc coated steel sheets can reduce carbon emissions by 15% per unit transported.