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【題目】鐵生銹的條件是_____________并存,鐵銹的主要成分是_________,鐵銹是一種混合物,鐵生就后變得疏松多孔,因而不能阻止鐵繼續被銹蝕,破壞鐵生銹的條件就能防止鐵生銹。

【答案】水和空氣;氧化鐵

【解析】鐵生銹是鐵在空氣中與氧氣和水發生的緩慢氧化的過程,該變化需要氧氣和水同時存在,缺一不可;鐵銹是一種混合物,其主要成分是氧化鐵。

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