👉 The pass fluid, often referred to as the passivation layer, is a thin oxide film that forms on the surface of certain metals when exposed to an oxidizing environment, typically in the presence of oxygen. This layer acts as a protective barrier, preventing further corrosion by blocking the metal's reactive sites from contacting corrosive agents like water and oxygen. The pass fluid is crucial in maintaining the longevity and integrity of metals used in various applications, including construction, automotive, and electronics, by significantly reducing their susceptibility to rust and degradation.
