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鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分為(wei)兩種：熱(re)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)熱(re)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)：熱(re)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)使熔(rong)融(rong)金屬與鐵(tie)基(ji)體(ti)(ti)反應(ying)而產生合(he)金層(ceng)(ceng)(ceng)，從而使基(ji)體(ti)(ti)和鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)層(ceng)(ceng)(ceng)二者相結合(he)。熱(re)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)是(shi)先將鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)進(jin)(jin)行(xing)酸洗，為(wei)了去除(chu)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)表面的(de)(de)(de)(de)氧(yang)化鐵(tie)，酸洗后(hou)(hou)，通(tong)過氯(lv)化銨或氯(lv)化鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)水(shui)溶液(ye)或氯(lv)化銨和氯(lv)化鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)混合(he)水(shui)溶液(ye)槽中(zhong)進(jin)(jin)行(xing)清洗，然(ran)后(hou)(hou)送入熱(re)浸鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)槽中(zhong)。熱(re)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)具(ju)有(you)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)層(ceng)(ceng)(ceng)均勻(yun)，附著(zhu)力強(qiang)，使用(yong)壽(shou)命長等優(you)點。熱(re)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)基(ji)體(ti)(ti)與熔(rong)融(rong)的(de)(de)(de)(de)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)液(ye)發生復雜(za)的(de)(de)(de)(de)物理、化學反 鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)應(ying)，形成耐腐蝕(shi)的(de)(de)(de)(de)結構緊密的(de)(de)(de)(de)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)一(yi)(yi)鐵(tie)合(he)金層(ceng)(ceng)(ceng)。合(he)金層(ceng)(ceng)(ceng)與純鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)、鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)基(ji)體(ti)(ti)融(rong)為(wei)一(yi)(yi)體(ti)(ti)。故其耐腐蝕(shi)能力強(qiang)。冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)：冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)就是(shi)電(dian)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)，鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)量(liang)很少，只(zhi)有(you)10-50g/m2，其本(ben)身的(de)(de)(de)(de)耐腐蝕(shi)性(xing)比熱(re)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)相差(cha)很多。正規的(de)(de)(de)(de)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)生產廠家，為(wei)了保證質量(liang)，大多不采用(yong)電(dian)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du))。只(zhi)有(you)那些規模小、設備陳(chen)舊的(de)(de)(de)(de)小企(qi)業采用(yong)電(dian)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)，當(dang)然(ran)他們的(de)(de)(de)(de)價格也相對便宜一(yi)(yi)些。目前建(jian)(jian)設部已正式下文(wen)，淘汰技術(shu)落后(hou)(hou)的(de)(de)(de)(de)冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，今后(hou)(hou)不準用(yong)冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)作(zuo)水(shui)、煤(mei)氣管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)是(shi)電(dian)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)層(ceng)(ceng)(ceng)，鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)與鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)基(ji)體(ti)(ti)獨立分層(ceng)(ceng)(ceng)。鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)較(jiao)薄(bo)，鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)簡單附著(zhu)在鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)基(ji)體(ti)(ti)上，容易脫落。故其耐腐蝕(shi)性(xing)能差(cha)。在新建(jian)(jian)住宅中(zhong)，禁止使用(yong)冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)作(zuo)為(wei)給(gei)水(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。

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