| Dictionary: dross |
[Middle English dros, from Old English drōs, dregs.]
drossy dross'y adj.| 5min Related Video: dross |
| Word Tutor: dross |
This discipline and rough treatment are a furnace to extract the silver from the dross. This testing purifies the gold by boiling the scum away.
— Mevlana Rumi (1207-1273), Persian sufi mystic from Rumi Daylight: A Daybook of Spiritual Guidance.
| WordNet: dross |
The noun has 2 meanings:
Meaning #1:
worthless material that should be removed
Synonym: impurity
Meaning #2:
the scum formed by oxidation at the surface of molten metals
Synonyms: slag, scoria
| Wikipedia: Dross |
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This article needs additional citations for verification. Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (November 2009) |
Dross is a mass of solid impurities floating on a molten metal. It appears usually on the melting of low-melting-point metals or alloys such as tin, lead, zinc or aluminium, or by oxidation of the metal(s). It can also consist of impurities such as paint leftovers. It can easily be skimmed off the surface before pouring the metal into a mold or casting flask.
With tin and lead the dross can also be removed by adding sodium hydroxide pellets, which dissolve the oxides and form a slag.
Dross, as a solid, is distinguished from slag, which is a liquid. Dross product is not entirely waste material; aluminium dross, for example, can be recycled and is used in secondary steelmaking for slag deoxidation.[1]
In the electronic wave soldering process, dross can account for over 50% of the metal required. With the advent of lead-free solders, the cost of replacing metal lost to dross has become unacceptably high. Dross also reduces the expected quality of the solder joint as measured in defects per million opportunities (DPMO).
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| Translations: Dross |
Dansk (Danish)
n. - affald, skum, slagger
Nederlands (Dutch)
rommel, metaalschuim
Français (French)
n. - (Métal) scories, crasse, impuretés, déchets, rebut
Deutsch (German)
n. - Abfall, Dreck, (tech.) Gekrätz, Abschaum
Ελληνική (Greek)
n. - έλκυσμα (αφρός ή σκωρία λιωμένου μετάλλου), ακαθαρσίες, απορρίμματα
Português (Portuguese)
n. - escória (f), resíduo (m)
Русский (Russian)
окалина, шлак
Español (Spanish)
n. - escoria, basura
Svenska (Swedish)
n. - orenlig, slagg
中文（简体）(Chinese (Simplified))
浮渣, 渣滓, 碎屑
中文（繁體）(Chinese (Traditional))
n. - 浮渣, 渣滓, 碎屑
한국어 (Korean)
n. - 앙금, 불순물, 쓸모 없는 물건
日本語 (Japanese)
n. - 浮きかす, くず, かす
العربيه (Arabic)
(الاسم) رغوة المعادن المنصهرة, نفايه
עברית (Hebrew)
n. - סיג, פסולת
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