- Base metal
In
chemistry , the term base metal is used informally to refer to ametal that oxidizes or corrodes relatively easily, and reacts variably with dilutedhydrochloric acid (HCl) to formhydrogen . Examples includeiron ,nickel ,lead andzinc .Copper is considered a base metal as it oxidizes relatively easily, although it does not react with HCl. It is commonly used in opposition tonoble metal .In
alchemy , a base metal was a common and inexpensive metal, as opposed toprecious metal s, mainlygold andsilver . A longtime goal of the alchemists was the transmutation of base metals into precious metals.In
numismatics , coins used to derive their value primarily from theprecious metal content. Most modern currencies arefiat currency , allowing the coins to be made of base metal.In
mining andeconomics , base metals refers to industrialnon-ferrous metals excludingprecious metals . These includecopper ,aluminium ,lead ,nickel ,tin andzinc .ee also
*
Reactivity series
*Philosopher's stone
*London Metal Exchange External links
* [http://www.kitcometals.com/ Live base metal prices - USD/lb]
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См. также в других словарях:
Base metal — Base Base (b[=a]s), a. [OE. bass, F. bas, low, fr. LL. bassus thick, fat, short, humble; cf. L. Bassus, a proper name, and W. bas shallow. Cf. {Bass} a part in music.] 1. Of little, or less than the usual, height; of low growth; as, base shrubs.… … The Collaborative International Dictionary of English
Base metal — Metal Met al (? or ?; 277), n. [F. m[ e]tal, L. metallum metal, mine, Gr. ? mine; cf. Gr. ? to search after. Cf. {Mettle}, {Medal}.] 1. (Chem.) An elementary substance, as sodium, calcium, or copper, whose oxide or hydroxide has basic rather than … The Collaborative International Dictionary of English
base metal — base metals N VAR A base metal is a metal such as copper, zinc, tin, or lead that is not a precious metal. Ant: precious metal … English dictionary
base metal — noun count a metal that is not worth a lot of money, for example iron ─ compare PRECIOUS METAL … Usage of the words and phrases in modern English
base metal — n [U and C] a metal that is not very valuable, such as iron or lead … Dictionary of contemporary English
base metal — ► NOUN ▪ a common non precious metal such as copper, tin, or zinc … English terms dictionary
Base metal — Base metal. См. Основной металл. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) … Словарь металлургических терминов
base metal — noun a metal that is common and not considered precious lead, iron, copper, tin, and zinc are base metals • Hypernyms: ↑metallic element, ↑metal * * * ˌbase ˈmetal [base metal base metals] … Useful english dictionary
base metal — UK / US noun [countable] Word forms base metal : singular base metal plural base metals a metal that is not worth a lot of money, for example iron • See: precious metal … English dictionary
base metal — netaurusis metalas statusas T sritis fizika atitikmenys: angl. base metal vok. Nichtedelmetall, n; unedles Metall, n rus. неблагородный металл, m pranc. métal bas, m; métal pauvre, m; métal vil, m … Fizikos terminų žodynas
