Since the Chinese calendar is a lunisolar calendar, the last day of a year is also called lunar New Year's Eve (Traditional Chinese: å¤§å¹´å¤, Pinyin: dÃ niÃ¡nyÃ¨, translated: old, large, huge, major, important year's night).
Aluminum corrodes but it does not rust. Rust refers only to iron and steel corrosion. Aluminum is actually very prone to corrosion. However, aluminum corrosion is aluminum oxide, a very hard material that actually protects the aluminum from further corrosion. Aluminum oxide corrosion also looks a lot more like aluminum (dull gray to powdery white in color), so it isn't as easy to notice as rusted iron.
In consequence, aluminum can be found in steel as metallicaluminum and (so-called soluble aluminum), aluminum oxide and aluminumnitride. Metallic aluminum and aluminum nitride can be dissolved in acid and sothis part is called acid soluble aluminum or simply soluble aluminum.During thesteel production process, it is important to have a measure of the level of thesoluble aluminum in steel. Soluble and insoluble compounds in metals with spectrolab 167Fig. 7 â Evolution of the aluminum signal from the start of the analysis. Following this discovery, the peak integration method (PIM) was introducedat SIDEX in 2000.