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鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)分(fen)(fen)為兩種：熱(re)(re)(re)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)和冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)熱(re)(re)(re)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)：熱(re)(re)(re)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)是使(shi)熔融(rong)金(jin)屬與(yu)(yu)鐵(tie)(tie)基(ji)體(ti)反(fan)應而產生合金(jin)層(ceng)(ceng)，從而使(shi)基(ji)體(ti)和鍍(du)(du)(du)(du)(du)(du)(du)層(ceng)(ceng)二(er)者相結合。熱(re)(re)(re)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)是先將鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)進行酸洗(xi)，為了去除鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)表面的(de)(de)(de)(de)氧化(hua)鐵(tie)(tie)，酸洗(xi)后(hou)(hou)，通(tong)過(guo)氯化(hua)銨或氯化(hua)鋅(xin)(xin)(xin)(xin)(xin)(xin)水(shui)(shui)溶(rong)液(ye)或氯化(hua)銨和氯化(hua)鋅(xin)(xin)(xin)(xin)(xin)(xin)混合水(shui)(shui)溶(rong)液(ye)槽中(zhong)進行清洗(xi)，然(ran)后(hou)(hou)送(song)入熱(re)(re)(re)浸鍍(du)(du)(du)(du)(du)(du)(du)槽中(zhong)。熱(re)(re)(re)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)具有(you)(you)鍍(du)(du)(du)(du)(du)(du)(du)層(ceng)(ceng)均勻，附著力強，使(shi)用(yong)壽命長等優點。熱(re)(re)(re)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)基(ji)體(ti)與(yu)(yu)熔融(rong)的(de)(de)(de)(de)鍍(du)(du)(du)(du)(du)(du)(du)液(ye)發生復(fu)雜的(de)(de)(de)(de)物理(li)、化(hua)學反(fan) 鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)應，形(xing)成耐(nai)腐蝕(shi)的(de)(de)(de)(de)結構緊密的(de)(de)(de)(de)鋅(xin)(xin)(xin)(xin)(xin)(xin)一(yi)鐵(tie)(tie)合金(jin)層(ceng)(ceng)。合金(jin)層(ceng)(ceng)與(yu)(yu)純鋅(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)、鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)基(ji)體(ti)融(rong)為一(yi)體(ti)。故(gu)其耐(nai)腐蝕(shi)能力強。冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)：冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)就(jiu)是電鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)，鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)量(liang)很少，只有(you)(you)10-50g/m2，其本身的(de)(de)(de)(de)耐(nai)腐蝕(shi)性(xing)比(bi)熱(re)(re)(re)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)相差(cha)很多。正規(gui)的(de)(de)(de)(de)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)生產廠家，為了保證質量(liang)，大多不(bu)采用(yong)電鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(冷(leng)鍍(du)(du)(du)(du)(du)(du)(du))。只有(you)(you)那(nei)些規(gui)模小(xiao)、設(she)備陳舊的(de)(de)(de)(de)小(xiao)企業采用(yong)電鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)，當然(ran)他(ta)們的(de)(de)(de)(de)價格也相對便宜一(yi)些。目(mu)前建設(she)部已正式下文，淘汰技術(shu)落后(hou)(hou)的(de)(de)(de)(de)冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)，今后(hou)(hou)不(bu)準用(yong)冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)作水(shui)(shui)、煤氣管(guan)(guan)(guan)(guan)(guan)(guan)。 冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)是電鍍(du)(du)(du)(du)(du)(du)(du)層(ceng)(ceng)，鋅(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)與(yu)(yu)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)基(ji)體(ti)獨立分(fen)(fen)層(ceng)(ceng)。鋅(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)較薄，鋅(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)簡單附著在(zai)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)基(ji)體(ti)上，容(rong)易脫落。故(gu)其耐(nai)腐蝕(shi)性(xing)能差(cha)。在(zai)新建住(zhu)宅中(zhong)，禁止使(shi)用(yong)冷(leng)鍍(du)(du)(du)(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)作為給水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)。

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