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galvanizing |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.04 sec. |
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galvanizing, process of coating a metal, usually iron or steel, with a protective covering of zinc. Galvanized iron is prepared either by dipping iron, from which rust has been removed by the action of sulfuric acid, into molten zinc so that a thin layer of the zinc remains on the surface of the iron upon removal or by a method of electroplating. Iron is also coated with zinc by a method in which the iron is first covered with the zinc dust and then baked; an alloy is formed at the surface, the resulting product being known as sherardized iron. Sheets of pure iron, copper iron, and various steels, as well as wire and netting, are often galvanized, since the zinc coating resists oxidation and the action of moisture very successfully. When the coating is broken or pierced some protection is still afforded, since the zinc reacts with the corroding agent first. galvanizingProtection of iron or steel against exposure to the atmosphere and consequent rusting by application of a zinc coating. Properly applied, galvanizing may protect from atmospheric corrosion for 15–30 years or more. If the coating is damaged, the iron or steel continues to be protected by sacrificial corrosion, a phenomenon in which atmospheric oxidation spares the iron and affects the zinc (as long as it lasts). See also terneplate. |
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? Mentioned in | ? References in periodicals archive | ||
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| By galvanising a child's resilience to cope with previous abuse, neglect and instability, this attachment pattern has significant therapeutic benefits (Moses 2000; Ungar 2004). This article--part two in a series of three--examines the role that a powerful workforce communication and recognition programme can have in galvanising a huge, disparate workforce. Shown here is a little intervention, in which the architects were asked to add an extra floor of accommodation to an existing one-and-a-half-storey office block tacked on to a long row of factory buildings devoted to pot galvanising on a Schlierbach industrial estate. |
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