搜狗做题网英语翻译The coating of zinc serves two purposes:firstly it cover
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英语翻译
The coating of zinc serves two purposes:firstly it covers the iron and prevents its oxidation (rather like a coat ofpaint) and secondly it provides anodic protection.If the galvanized steel isscratched,allowing the air to oxidize some iron,the Fe2+ produced isimmediately reduced to iron by the zinc,and rusting does not occur.Similarapplications in which one metal is sacrificed to protect another are theattaching of sacrificial blocks of magnesium to underground steel pipelines andthe hulls of ships to prevent the rusting of iron.
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The coating of zinc serves two purposes:firstly it covers the iron and prevents its oxidation (rather like a coat ofpaint) and secondly it provides anodic protection.If the galvanized steel isscratched,allowing the air to oxidize some iron,the Fe2+ produced isimmediately reduced to iron by the zinc,and rusting does not occur.Similarapplications in which one metal is sacrificed to protect another are theattaching of sacrificial blocks of magnesium to underground steel pipelines andthe hulls of ships to prevent the rusting of iron.
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锌涂层有两个目的：第一,覆盖在铁表面防止氧化（和油漆涂层不同）；第二,提供阴极保护.如果镀锌钢材表面被刮伤,空气则会氧化铁,锌就会立即减少产生的二价铁,进而不会发生锈蚀.牺牲一些金属以保护另一些金属的类似应用有：在地下钢管和船体上附加牺牲镁块来防止铁生锈.
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