熱(re)鍍(du)(du)鋅(xin)(xin)管(guan)(guan)是使(shi)(shi)(shi)熔(rong)融(rong)(rong)金屬與(yu)鐵基體(ti)反(fan)應而(er)產生合金層(ceng)(ceng)，從而(er)使(shi)(shi)(shi)基體(ti)和(he)鍍(du)(du)層(ceng)(ceng)二者相結合。熱(re)鍍(du)(du)鋅(xin)(xin)是先將鋼管(guan)(guan)進(jin)行(xing)酸(suan)洗(xi)，為(wei)了去除(chu)鋼管(guan)(guan)表面的氧化(hua)(hua)鐵，酸(suan)洗(xi)后，通過氯化(hua)(hua)銨(an)或氯化(hua)(hua)鋅(xin)(xin)水(shui)溶液(ye)或氯化(hua)(hua)銨(an)和(he)氯化(hua)(hua)鋅(xin)(xin)混(hun)合水(shui)溶液(ye)槽中進(jin)行(xing)清洗(xi)，然后送入熱(re)浸鍍(du)(du)槽中。鍍(du)(du)鋅(xin)(xin)矩形(xing)管(guan)(guan)具有鍍(du)(du)層(ceng)(ceng)均(jun)勻(yun)，附著力強，使(shi)(shi)(shi)用(yong)壽命長等優點。熱(re)鍍(du)(du)鋅(xin)(xin)鋼管(guan)(guan)基體(ti)與(yu)鴉甩(shuai)道熔(rong)融(rong)(rong)的鍍(du)(du)液(ye)發生復雜(za)的物理、化(hua)(hua)學反(fan)應，形(xing)成耐腐(fu)(fu)蝕的結構(gou)緊密(mi)的鋅(xin)(xin)一鐵合金層(ceng)(ceng)。合金層(ceng)(ceng)與(yu)純鋅(xin)(xin)層(ceng)(ceng)、鋼管(guan)(guan)基體(ti)融(rong)(rong)為(wei)一體(ti)，故(gu)其耐腐(fu)(fu)蝕能力強。