Tiék-cĭng
外觀
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Rust_screw.jpg/200px-Rust_screw.jpg)
Tiék-cĭng (鐵鉎) sê tiék bó̤h-ló (暴露) diŏh kŭng-ké (空氣) hâ-lē iōng-huá (氧化) ī-hâiu, găk biēu-méng (表面) sāng-sĕng̤ gì iōng-huá-ŭk (氧化物). Ék-buăng lì gōng, tiék-cĭng gì sìng-hông (成份) ô Săng-iōng-huá-nê-tiék (三氧化二鐵) gâe̤ng Sé̤ṳ-iōng-huá-săng-tiék (四氧化三鐵). Dè̤ng (銅) gâe̤ng lṳ̄ (鋁) ĕng duǒk kŭng-ké hâ-lē iâ â̤ săng-cĭng (生鉎).