鍍鋅卷批發熱鍍鋅生產發展一直處于滯后狀態。20世紀50年代到60年代陸續建成了13條單張鋼板熔劑法熱鍍鋅機組，能力為10萬t/a，但因產量低、成本高、質量差、污染環境、經濟效益差等缺陷已先后停、轉產。從20世紀70年代末，我國才開始建造大型寬帶熱鍍鋅機組。陜西鍍鋅卷熱鍍(du)鋅帶鋼(gang)(gang)在我國(guo)市場(chang)一直是緊缺品種。從20世紀90年代(dai)中期(qi)以來(lai)，每年都要(yao)從國(guo)外進口80-100萬(wan)t左右。隨著(zhu)國(guo)內(nei)經濟的發(fa)展，尤其(qi)是汽車、家電(dian)及建筑業(ye)的發(fa)展，對鍍(du)鋅帶鋼(gang)(gang)的需求量也大大增加。

鍍鋅(xin)(xin)(xin)(xin)帶鋼的(de)鋅(xin)(xin)(xin)(xin)層特(te)性 電鍍鋅(xin)(xin)(xin)(xin)層是不能形(xing)成(cheng)鋅(xin)(xin)(xin)(xin)花的(de)，熱鍍鋅(xin)(xin)(xin)(xin)層則(ze)有鋅(xin)(xin)(xin)(xin)花，其(qi)(qi)形(xing)成(cheng)過程(cheng)如下：當鍍鋅(xin)(xin)(xin)(xin)帶從(cong)(cong)鋅(xin)(xin)(xin)(xin)鍋(guo)(guo)出來后，經氣刀的(de)噴吹，大(da)(da)量(liang)鋅(xin)(xin)(xin)(xin)液(ye)被吹回鋅(xin)(xin)(xin)(xin)鍋(guo)(guo)，這時(shi)帶鋼表(biao)面(mian)還有純(chun)鋅(xin)(xin)(xin)(xin)層，呈液(ye) 態附在(zai)鋼板(ban)表(biao)面(mian)，在(zai)鋼板(ban)表(biao)面(mian)形(xing)成(cheng)大(da)(da)量(liang)結晶核，隨著鋼板(ban)上(shang)升冷(leng)卻(que)，使結晶核慢慢長成(cheng)鋅(xin)(xin)(xin)(xin)花。冷(leng)卻(que)速(su)度越快(kuai)鋅(xin)(xin)(xin)(xin)花越小，冷(leng)卻(que)速(su)度越慢鋅(xin)(xin)(xin)(xin)花越大(da)(da)。熱鍍鋅(xin)(xin)(xin)(xin)帶鋼在(zai)我國(guo)市場一(yi)直(zhi)是緊缺品種。從(cong)(cong)20世紀90年(nian)代(dai)中期以來，每年(nian)都要從(cong)(cong)國(guo)外進口80-100萬t左(zuo)右。隨著國(guo)內經濟的(de)發展(zhan)，尤(you)其(qi)(qi)是汽車、家(jia)電及建筑業(ye)的(de)發展(zhan)，對鍍鋅(xin)(xin)(xin)(xin)帶鋼的(de)需求量(liang)也大(da)(da)大(da)(da)增加(jia)。

樓承板(ban)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)首(shou)要(yao)起到(dao)防(fang)(fang)腐的(de)(de)效(xiao)果，按標準(zhun)組合樓板(ban)與非(fei)(fei)組合樓板(ban)壓型鋼(gang)板(ban)應選(xuan)用(yong)(yong)熱鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)，不該選(xuan)用(yong)(yong)電鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)，其雙面鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)層(ceng)總(zong)含量(liang)(liang)要(yao)滿足在使(shi)用(yong)(yong)期間不致(zhi)銹(xiu)損的(de)(de)要(yao)求。當作為(wei)(wei)(wei)非(fei)(fei)組合樓承板(ban)時(shi)，鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)層(ceng)含量(liang)(liang)可選(xuan)用(yong)(yong)較低(di)值(zhi);當為(wei)(wei)(wei)組合樓承板(ban)時(shi)，鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)層(ceng)含量(liang)(liang)不該小于150g/m2。當為(wei)(wei)(wei)組合樓板(ban)且使(shi)用(yong)(yong)環境(jing)條件(jian)較為(wei)(wei)(wei)惡(e)劣時(shi)，鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)層(ceng)含量(liang)(liang)應選(xuan)用(yong)(yong)上限值(zhi)或(huo)(huo)更高值(zhi)。更高的(de)(de)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)要(yao)求，如雙面鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)量(liang)(liang)為(wei)(wei)(wei)300g/m2、350g/m2或(huo)(huo)鍍(du)(du)(du)鋁鋅(xin)(xin)(xin)(xin)(5%鋁)275g/m2、300g/m2等(deng)(deng)，較高的(de)(de)鍍(du)(du)(du)層(ceng)量(liang)(liang)使(shi)組合樓板(ban)有(you)更長耐久性，同(tong)等(deng)(deng)量(liang)(liang)的(de)(de)鍍(du)(du)(du)鋁鋅(xin)(xin)(xin)(xin)的(de)(de)防(fang)(fang)銹(xiu)蝕才能大(da)約兩倍于一般熱鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)。鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)量(liang)(liang)也不是越厚越好，當鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)量(liang)(liang)較厚時(shi)，抗剪連接件(jian)栓釘的(de)(de)焊(han)接質量(liang)(liang)就很難(nan)保證，焊(han)接時(shi)，宜(yi)選(xuan)用(yong)(yong)局部(bu)除鋅(xin)(xin)(xin)(xin)處理措施(shi)。

鋼(gang)筋(jin)桁(heng)架樓(lou)(lou)承板(ban)(ban)(ban)完成了(le)機械(xie)化(hua)出(chu)產(chan)(chan)，有利(li)于(yu)鋼(gang)筋(jin)擺(bai)放距離均勻、混凝土(tu)保護層厚度共同(tong)，提(ti)高了(le)樓(lou)(lou)板(ban)(ban)(ban)的(de)(de)施(shi)(shi)工(gong)(gong)(gong)(gong)質量。裝(zhuang)配(pei)式(shi)鋼(gang)筋(jin)桁(heng)架樓(lou)(lou)承板(ban)(ban)(ban)可(ke)(ke)明顯削減(jian)現場(chang)鋼(gang)筋(jin)綁(bang)扎工(gong)(gong)(gong)(gong)程(cheng)量，加速施(shi)(shi)工(gong)(gong)(gong)(gong)進(jin)度，添(tian)加施(shi)(shi)工(gong)(gong)(gong)(gong)確保，完成文(wen)明施(shi)(shi)工(gong)(gong)(gong)(gong)。裝(zhuang)配(pei)式(shi)模板(ban)(ban)(ban)和(he)連接件拆裝(zhuang)便(bian)利(li)，可(ke)(ke)屢次重復使用(yong)，節(jie)省鋼(gang)材，契合國家節(jie)能(neng)環保的(de)(de)要求。鋼(gang)構(gou)自(zi)主研制的(de)(de)產(chan)(chan)品配(pei)套自(zi)動化(hua)出(chu)產(chan)(chan)設備，大大提(ti)高了(le)勞動出(chu)產(chan)(chan)率(lv)，有用(yong)降低了(le)產(chan)(chan)品成本，并(bing)編制了(le)產(chan)(chan)品出(chu)產(chan)(chan)企業規范、規劃手冊(ce)和(he)節(jie)點(dian)構(gou)造圖集以及施(shi)(shi)工(gong)(gong)(gong)(gong)手冊(ce)。該(gai)產(chan)(chan)品經過浙(zhe)江大學土(tu)木工(gong)(gong)(gong)(gong)程(cheng)測(ce)試中(zhong)心(xin)檢測(ce)，并(bing)經過多項工(gong)(gong)(gong)(gong)程(cheng)使用(yong)，各項功能(neng)可(ke)(ke)以滿(man)意現澆(jiao)鋼(gang)筋(jin)混凝土(tu)樓(lou)(lou)板(ban)(ban)(ban)承載力和(he)變形的(de)(de)要求。