Used primarily for removing mineral deposits and scale from metal surfaces, especially in industrial cleaning and maintenance. Effective in descaling boilers, heat exchangers, and cooling systems by dissolving calcium and magnesium salts. Commonly applied in metal preparation prior to coating or welding, ensuring clean, oxide-free surfaces. Also utilized in food processing equipment cleaning where mineral buildup occurs. Requires careful handling due to corrosive nature, and is often neutralized after use to prevent damage to equipment and meet environmental regulations.