“Chemical reaction” isn’t just fizzing and flames. When mercury touches aluminum, you’re watching surface chemistry, thermodynamics, and materials science collide ⚗️ Normally, aluminum is protected by a thin, invisible layer of aluminum oxide (Al₂O₃). This oxide forms instantly in air and blocks further reaction — that’s why aluminum doesn’t just keep rusting like iron. Mercury changes everything. Mercury amalgamates with aluminum (it dissolves aluminum atoms into itself). In doing so, it destroys the oxide layer that keeps aluminum stable. Once that protective layer is gone, bare aluminum is exposed to air and moisture. What happens next is the real chemical reaction: • Aluminum rapidly reacts with oxygen • New aluminum oxide forms • Heat is released (exothermic reaction) • The mercury is freed again to attack more aluminum So mercury isn’t consumed — it acts like a chemical saboteur, continuously enabling oxidation. That’s why even tiny amounts can cause dramatic structural ...