Selective leaching, or dealloying, is a common issue in bronze alloys where one metal component is preferentially removed, weakening the material. To prevent this, several effective methods can be employed.

1. Alloy Composition Optimization: Adjusting the ratio of copper to other metals like tin, aluminum, or nickel can enhance corrosion resistance. For example, adding 5-10% tin significantly reduces leaching risks.

2. Protective Coatings: Applying coatings such as lacquers, oxides, or electroplated layers (e.g., nickel or chromium) creates a barrier against corrosive environments.

3. Cathodic Protection: Connecting the bronze alloy to a sacrificial anode (like zinc) can prevent electrochemical leaching by diverting corrosion.

4. Environmental Control: Reducing exposure to acidic or saline conditions slows leaching. Using inhibitors in cooling systems or marine applications is highly effective.

5. Heat Treatment: Annealing or quenching bronze alloys can stabilize the microstructure, minimizing selective corrosion.

By combining these methods, bronze alloys maintain structural integrity and longevity in demanding applications. Regular inspections and material testing further ensure long-term performance.