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Will tungsten carbide rust? Will tungsten carbide rust? Pure tungsten carbide does not rust under normal temperature and pressure. Pure tungsten carbide is highly stable in dry air at room temperature; an extremely thin oxide film (primarily WO₃) forms on its surface, preventing further oxidation. Therefore, significant corrosion almost never occurs in everyday environments (such as indoors, at room temperature). Under extreme conditions, tungsten carbide may oxidize: High-temperature environments (>500–600°C):At high temperatures, tungsten carbide reacts with oxygen: WC + 5O₂ → 2WO₃ + 2CO₂. A yellow or bluish-purple tungsten trioxide (WO₃) layer forms on the surface. The oxidation of tungsten carbide is fundamentally different from the rusting of iron. The […]
