Environmental characteristics and carbon emission reduction contribution of galvanized aluminum zinc plates
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 recycling rate of over 98% for the aluminum-zinc melt, reducing metal resource consumption; Secondly, aluminum in the coating can replace part of the chromate passivator, lowering the risk of heavy metal pollution; Thirdly, the high-reflective surface can reduce the urban heat island effect, indirectly lowering air conditioning energy consumption. According to calculations, each 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 border tax policy, building products using aluminum-zinc coated steel sheets are eligible for carbon credit rewards, significantly enhancing export competitiveness. Moreover, the lightweight nature of aluminum-zinc coated steel sheets reduces transportation energy consumption – for instance, using them in automotive parts can cut down carbon emissions by 15% per unit transported.