為何窗框要選用鋁材

鋁是易起化學反應的，會自然地與水和/或空氣合成為氧化鋁。 氧化鋁Al2O3，會形成穩定的覆蓋層，保護鋁免受腐蝕或進一步氧化。 該層厚約4奈米，只要該氧化層穩定就能提供腐蝕保護。

Aluminum is reactive and will react spontaneously with water and/or air to form aluminum oxide. Aluminum oxide, Al2O3, forms a stable passive layer that protects aluminum from corrosion or further oxidation. This layer is about 4 nm thick and will provide corrosion protection as long as this oxide layer is stable.

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