What role does galvanic corrosion play in mixed-metal animal sculptures combining aluminum and steel?
Galvanic corrosion is a critical concern in mixed-metal animal sculptures that combine aluminum and steel. When these two dissimilar metals are in contact within an electrolyte (like moisture), an electrochemical reaction occurs, causing the aluminum to corrode faster than it would alone. This happens because steel acts as a cathode, accelerating aluminum's oxidation. To prevent this, artists often use insulating materials like rubber gaskets or protective coatings to separate the metals. Understanding galvanic corrosion ensures the longevity and structural integrity of mixed-metal sculptures, preserving their artistic value. Techniques like anodizing aluminum or using stainless steel can also mitigate corrosion risks in outdoor installations.
