What are the challenges of welding dissimilar metals in mixed-material outdoor sculptures?

Welding dissimilar metals in mixed-material outdoor sculptures presents several unique challenges. One major issue is the difference in thermal expansion rates between metals, which can lead to cracking or warping over time. Corrosion is another concern, as galvanic reactions may occur when dissimilar metals are in contact, especially in outdoor environments exposed to moisture. Additionally, achieving a strong and durable weld requires specialized techniques, as not all metals bond well together. Structural integrity can also be compromised if the weld fails under stress or environmental conditions. Finally, aesthetic consistency is difficult to maintain, as welded joints may discolor or degrade differently than the surrounding materials. Addressing these challenges requires careful material selection, advanced welding methods, and protective coatings to ensure longevity and visual appeal.