… Brass improved by adding 0.5 to 2% of additive elements to 7-3 brass or 4-6 brass is called special brass. Admiralty brass is made by adding about 1% tin to 7-3 brass, and naval brass is made by adding tin to 4-6 brass. These brasses have good seawater resistance and have been used for ships and condensers that use seawater. However, as seawater becomes polluted, corrosion becomes a problem, so aluminum brass (Alublack) with about 2% aluminum and a small amount of arsenic added was developed. This has excellent corrosion resistance and is used in condensers, etc. … *Some of the terminology that refers to "Alblack" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 7‐3黄銅や4‐6黄銅に0.5~2%程度の添加元素を加えて改良した黄銅を特殊黄銅という。7‐3黄銅に約1%のスズを加えたものをアドミラルティ黄銅,4‐6黄銅に加えたものをネーバル黄銅といって,耐海水性がよく,船舶用や海水を使用する復水器用の管として使用してきたが,海水が汚染するにつれて腐食が問題となり,約2%のアルミニウムと少量のヒ素を添加したアルミニウム黄銅(アルブラック)が開発された。これは優れた耐食性を示し,復水器などに使用されている。… ※「アルブラック」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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