名词
中文翻译：自然氧化物膜
同义词：
['natural oxide layer', 'natural oxide coating']
例句：
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1. The surface ofthe metal is covered with a natural oxide film to protect it from corrosion.
金属表面覆盖着一层自然氧化物膜，以保护它免受腐蚀。
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2.The researchers found that the natural oxide film on the surface of the sample could be removed by acid treatment.
研究人员发现，样品表面的自然氧化物膜可以通过酸处理去除。
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3. The natural oxide film on the surface of the metal is essential for its corrosion resistance.
金属表面的自然氧化物膜对其耐腐蚀性至关重要。