Why Does Stainless Steel Still Rust?

Stainless steel is designed to resist corrosion — so why does it still rust? In this video, we explore the hidden engineering behind stainless steel and the ultra-thin passive layer that protects it from corrosion. You’ll see how chlorides, pitting corrosion, contamination, welding heat tint, crevices, and choosing the wrong stainless steel grade can cause that protection to fail. We also look at why 304 and 316 stainless steels can behave very differently in harsh environments. Why It Holds explores the engineering hidden inside materials, machines and structures — and what happens when they fail. Why it holds. Why it breaks. Subscribe for more engineering explained. #Engineering #StainlessSteel #Corrosion