Zinc is essential for corrosion protection in construction, energy, and transportation sectors, primarily through galvanizing steel. Its high corrosion resistance, malleability, and recyclability make it a critical enabler of offshore wind infrastructure, solar support structures, and resilient power grids. As energy transition technologies move into harsher environments, zinc's role in ensuring structural longevity is increasingly vital.
- Key uses: Steel galvanization, offshore wind structures, solar panel frames, power transmission towers, batteries (zinc-air)
- Physical properties: High corrosion resistance, malleable, conductive, relatively low melting point
- Projected demand: Expected to grow steadily through 2040, with renewable energy deployment driving new applications
- Supply concentration:
- China, Peru, and Australia are the top zinc producers.
- Smelting and refining capacity heavily concentrated in Asia.
Environmental and Social Criticisms:
- Mining waste: Zinc mining produces large volumes of tailings containing heavy metals, posing long-term risks to water supplies and ecosystems.
- Air pollution: Smelting operations emit sulfur dioxide, contributing to acid rain and respiratory health impacts.
- Energy use: While less energy-intensive than aluminum, zinc production still requires significant electricity inputs, often from fossil fuels.
Geopolitical and Market Risks:
- Concentration of refining: China’s dominance in refining and smelting raises supply chain concerns for Western industries.
- Price volatility: Tied closely to construction and infrastructure markets, zinc prices can swing with macroeconomic cycles.
- Supply disruption risk: Political instability in Peru, a major zinc producer, could cause market shocks.