鍍鋅無縫鋼管鍍(du)(du)(du)鋅(xin)(xin)量很少,只有10-50g/m2,其本(ben)身的耐(nai)腐蝕(shi)性(xing)比熱鍍(du)(du)(du)鋅(xin)(xin)管(guan)(guan)(guan)(guan)相(xiang)差很多。正規的鍍(du)(du)(du)鋅(xin)(xin)管(guan)(guan)(guan)(guan)生產廠家,準用(yong)冷鍍(du)(du)(du)鋅(xin)(xin)管(guan)(guan)(guan)(guan)作水(shui)、煤(mei)氣管(guan)(guan)(guan)(guan)。 冷鍍(du)(du)(du)鋅(xin)(xin)鋼(gang)管(guan)(guan)(guan)(guan)鍍(du)(du)(du)鋅(xin)(xin)層(ceng)是電鍍(du)(du)(du)層(ceng),鋅(xin)(xin)層(ceng)與鋼(gang)管(guan)(guan)(guan)(guan)基(ji)體獨立分層(ceng)。鋅(xin)(xin)層(ceng)較(jiao)薄(bo),鋅(xin)(xin)層(ceng)簡單附著(zhu)在鋼(gang)管(guan)(guan)(guan)(guan)基(ji)體上,容易(yi)脫落。故其耐(nai)腐蝕(shi)性(xing)能差。在新建(jian)住宅中(zhong),禁止使用(yong)冷鍍(du)(du)(du)鋅(xin)(xin)鋼(gang)管(guan)(guan)(guan)(guan)作為給水(shui)鋼(gang)管(guan)(guan)(guan)(guan)。
酸洗后,通過(guo)氯(lv)化銨或 氯(lv)化鋅水溶(rong)液或氯(lv)化銨和(he)氯(lv)化鋅混合水溶(rong)液槽中進(jin)行(xing)清(qing)洗為了保證(zheng)質(zhi)量,大(da)多不采用電鍍鋅(冷鍍)。
只有那些規(gui)模小、設備陳舊(jiu)的小企(qi)業(ye)采用(yong)(yong)電鍍鋅,當(dang)然他們的價格也相對便宜一些。目前建設部(bu)已(yi)正式下文,淘汰技術落后的冷(leng)鍍鋅管(guan),為了去(qu)除鋼管(guan)表面的氧化鐵,,然后送入熱(re)(re)浸鍍槽中。熱(re)(re)鍍鋅具有鍍層(ceng)均勻,附著力強,使用(yong)(yong)壽命長等優點。