What material is often used for tinning bronze shells?

Tinning involves applying a thin layer of tin to a surface to improve corrosion resistance and enhance solderability. When it comes to bronze shells, lead is commonly used due to its properties that facilitate the tinning process. Lead effectively adheres to bronze and creates a suitable surface for tin application. Tinning with lead is particularly advantageous in applications where heat resistance is critical, as it provides a stable coating that withstands high temperatures without degrading. This practice is essential in various mechanical applications where the integrity of the bronze shell must be maintained, and lead serves to enhance the performance of the bronze under different environmental conditions.