鍍鋅帶鋼(gang)(gang)的鋅層特性 電鍍鋅層是(shi)不能形(xing)成(cheng)(cheng)鋅花(hua)(hua)的，熱(re)鍍鋅層則有鋅花(hua)(hua)，其(qi)形(xing)成(cheng)(cheng)過程如下：當鍍鋅帶從(cong)(cong)鋅鍋(guo)出來后，經(jing)氣刀(dao)的噴吹，大量(liang)鋅液被吹回鋅鍋(guo)，這時帶鋼(gang)(gang)表面(mian)還有純鋅層，呈液 態附在鋼(gang)(gang)板(ban)表面(mian)，在鋼(gang)(gang)板(ban)表面(mian)形(xing)成(cheng)(cheng)大量(liang)結(jie)(jie)晶核(he)，隨著(zhu)鋼(gang)(gang)板(ban)上升冷(leng)卻，使(shi)結(jie)(jie)晶核(he)慢(man)慢(man)長成(cheng)(cheng)鋅花(hua)(hua)。冷(leng)卻速度越快(kuai)鋅花(hua)(hua)越小，冷(leng)卻速度越慢(man)鋅花(hua)(hua)越大。熱(re)鍍鋅帶鋼(gang)(gang)在我國(guo)市場一直是(shi)緊缺品種。從(cong)(cong)20世紀90年代中期以來，每年都要(yao)從(cong)(cong)國(guo)外進口80-100萬t左右。隨著(zhu)國(guo)內經(jing)濟的發(fa)展，尤其(qi)是(shi)汽車、家電及建筑業的發(fa)展，對鍍鋅帶鋼(gang)(gang)的需求量(liang)也大大增加。

鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)是(shi)為防止鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)表面(mian)遭受腐蝕，延長(chang)其使用(yong)壽命，在(zai)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)表面(mian)涂(tu)以一層金(jin)屬鋅(xin)(xin)，這(zhe)種(zhong)涂(tu)鋅(xin)(xin)的(de)(de)薄(bo)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)稱為鍍(du)(du)(du)(du)鋅(xin)(xin)板(ban)(ban)(ban)(ban)(ban)(ban)。鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)也是(shi)用(yong)熱(re)(re)浸(jin)法(fa)(fa)制(zhi)造，但在(zai)出槽(cao)(cao)后，立即把它(ta)加(jia)熱(re)(re)到(dao)500℃左右(you)，使其生成(cheng)(cheng)鋅(xin)(xin)和鐵(tie)的(de)(de)合金(jin)被膜。這(zhe)種(zhong)鍍(du)(du)(du)(du)鋅(xin)(xin)卷(juan)具有良(liang)好(hao)的(de)(de)涂(tu)料(liao)的(de)(de)密(mi)著性和焊接性。合金(jin)化(hua)鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。這(zhe)種(zhong)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)也是(shi)用(yong)熱(re)(re)浸(jin)法(fa)(fa)制(zhi)造，但在(zai)出槽(cao)(cao)后，立即把它(ta)加(jia)熱(re)(re)到(dao)500℃左右(you)，使其生成(cheng)(cheng)鋅(xin)(xin)和鐵(tie)的(de)(de)合金(jin)被膜。這(zhe)種(zhong)鍍(du)(du)(du)(du)鋅(xin)(xin)板(ban)(ban)(ban)(ban)(ban)(ban)具有良(liang)好(hao)的(de)(de)涂(tu)料(liao)的(de)(de)密(mi)著性和焊接性。熱(re)(re)浸(jin)鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。將薄(bo)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)浸(jin)入熔解的(de)(de)鋅(xin)(xin)槽(cao)(cao)中，使其表面(mian)粘附一層鋅(xin)(xin)的(de)(de)薄(bo)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。目前主要采用(yong)連續鍍(du)(du)(du)(du)鋅(xin)(xin)工藝生產(chan)，即把成(cheng)(cheng)卷(juan)的(de)(de)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)連續浸(jin)在(zai)熔解有鋅(xin)(xin)的(de)(de)鍍(du)(du)(du)(du)槽(cao)(cao)中制(zhi)成(cheng)(cheng)鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。合金(jin)、復合鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。它(ta)是(shi)用(yong)鋅(xin)(xin)和其他金(jin)屬如(ru)鉛、鋅(xin)(xin)制(zhi)成(cheng)(cheng)合金(jin)乃至(zhi)復合鍍(du)(du)(du)(du)成(cheng)(cheng)的(de)(de)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。這(zhe)種(zhong)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)既具有防銹性能，又有良(liang)好(hao)的(de)(de)涂(tu)裝(zhuang)性能。

熱鍍鋅廠家熱浸鍍鋅鋼板將薄鋼板浸入熔解的鋅槽中，使其表面粘附一層鋅的薄鋼板。目前主要采用連續鍍鋅工藝生產，即把成卷的鋼板連續浸在熔解有鋅的鍍槽中制成鍍鋅鋼板;合金化鍍鋅鋼板。遵義攀鋼熱鍍鋅這(zhe)種鋼(gang)(gang)板(ban)(ban)(ban)也是用(yong)熱浸(jin)法(fa)制造，但(dan)在(zai)出槽(cao)后，立即(ji)把它加熱到500 ℃左右，使其(qi)生(sheng)成鋅和(he)鐵的合金被膜。這(zhe)種鍍(du)(du)鋅板(ban)(ban)(ban)具有(you)良(liang)好(hao)的涂料(liao)的密(mi)著性和(he)焊接性;電鍍(du)(du)鋅鋼(gang)(gang)板(ban)(ban)(ban)。用(yong)電鍍(du)(du)法(fa)制造這(zhe)種鍍(du)(du)鋅鋼(gang)(gang)板(ban)(ban)(ban)具有(you)良(liang)好(hao)的加工(gong)性。但(dan)鍍(du)(du)層較(jiao)薄，耐(nai)腐蝕性不(bu)如(ru)熱浸(jin)法(fa)鍍(du)(du)鋅板(ban)(ban)(ban);單面鍍(du)(du)和(he)雙面差鍍(du)(du)鋅鋼(gang)(gang)板(ban)(ban)(ban)。單面鍍(du)(du)鋅鋼(gang)(gang)板(ban)(ban)(ban)，即(ji)只在(zai)一面鍍(du)(du)鋅的產(chan)品。在(zai)焊接、涂裝、防(fang)銹處理、加工(gong)等方面，具有(you)比雙面鍍(du)(du)鋅板(ban)(ban)(ban)好(hao)的適(shi)應性。

鍍(du)鋅(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)為基板(ban)(ban)(ban)的(de)(de)彩(cai)涂(tu)(tu)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)，除有鋅(xin)保護外，鋅(xin)層(ceng)(ceng)上(shang)的(de)(de)有機(ji)涂(tu)(tu)層(ceng)(ceng)起(qi)了覆(fu)蓋隔離作用(yong)，可防止鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)生銹，使用(yong)壽(shou)(shou)命比(bi)鍍(du)鋅(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)更長，據介紹涂(tu)(tu)層(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)的(de)(de)使用(yong)壽(shou)(shou)命比(bi)鍍(du)鋅(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)長50%。在(zai)連續機(ji)組上(shang)以冷軋帶鋼(gang)(gang)(gang)(gang)，鍍(du)鋅(xin)帶鋼(gang)(gang)(gang)(gang)（電鍍(du)鋅(xin)和(he)熱鍍(du)鋅(xin)）為基板(ban)(ban)(ban)，經過(guo)表面預處(chu)理(li)（脫脂(zhi)和(he)化學(xue)處(chu)理(li)），用(yong)輥涂(tu)(tu)的(de)(de)方法(fa)，涂(tu)(tu)上(shang)一層(ceng)(ceng)或多層(ceng)(ceng)液態涂(tu)(tu)料，經過(guo)烘烤和(he)冷卻所得的(de)(de)板(ban)(ban)(ban)材即(ji)為涂(tu)(tu)層(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。由于涂(tu)(tu)層(ceng)(ceng)可以有各種不同的(de)(de)顏色(se)，習慣上(shang)把涂(tu)(tu)層(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)叫(jiao)做彩(cai)色(se)涂(tu)(tu)層(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。又由于涂(tu)(tu)層(ceng)(ceng)是在(zai)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)成型加工之前進行的(de)(de)，在(zai)國外這叫(jiao)做預涂(tu)(tu)層(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。

樓(lou)(lou)(lou)承板(ban)(ban)(ban)(ban)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)首(shou)要起到防腐(fu)的(de)效果，按標準(zhun)組(zu)(zu)(zu)合樓(lou)(lou)(lou)板(ban)(ban)(ban)(ban)與非(fei)組(zu)(zu)(zu)合樓(lou)(lou)(lou)板(ban)(ban)(ban)(ban)壓型鋼板(ban)(ban)(ban)(ban)應選(xuan)用(yong)熱鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)，不(bu)該(gai)選(xuan)用(yong)電鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼板(ban)(ban)(ban)(ban)，其雙面鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)總含量(liang)(liang)(liang)要滿(man)足(zu)在(zai)使用(yong)期(qi)間不(bu)致銹(xiu)損(sun)的(de)要求(qiu)。當(dang)作為非(fei)組(zu)(zu)(zu)合樓(lou)(lou)(lou)承板(ban)(ban)(ban)(ban)時(shi)，鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)含量(liang)(liang)(liang)可(ke)選(xuan)用(yong)較低值(zhi);當(dang)為組(zu)(zu)(zu)合樓(lou)(lou)(lou)承板(ban)(ban)(ban)(ban)時(shi)，鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)含量(liang)(liang)(liang)不(bu)該(gai)小于150g/m2。當(dang)為組(zu)(zu)(zu)合樓(lou)(lou)(lou)板(ban)(ban)(ban)(ban)且使用(yong)環境條件較為惡劣時(shi)，鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)含量(liang)(liang)(liang)應選(xuan)用(yong)上限值(zhi)或(huo)更(geng)(geng)高值(zhi)。更(geng)(geng)高的(de)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)要求(qiu)，如雙面鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)量(liang)(liang)(liang)為300g/m2、350g/m2或(huo)鍍(du)(du)鋁(lv)(lv)鋅(xin)(xin)(xin)(xin)(xin)(5%鋁(lv)(lv))275g/m2、300g/m2等(deng)，較高的(de)鍍(du)(du)層(ceng)(ceng)(ceng)量(liang)(liang)(liang)使組(zu)(zu)(zu)合樓(lou)(lou)(lou)板(ban)(ban)(ban)(ban)有更(geng)(geng)長耐久性(xing)，同等(deng)量(liang)(liang)(liang)的(de)鍍(du)(du)鋁(lv)(lv)鋅(xin)(xin)(xin)(xin)(xin)的(de)防銹(xiu)蝕才能(neng)大(da)約兩倍于一般(ban)熱鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)。鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)量(liang)(liang)(liang)也不(bu)是越(yue)厚越(yue)好(hao)，當(dang)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)量(liang)(liang)(liang)較厚時(shi)，抗(kang)剪連接(jie)件栓釘的(de)焊接(jie)質量(liang)(liang)(liang)就很難保(bao)證，焊接(jie)時(shi)，宜選(xuan)用(yong)局部除鋅(xin)(xin)(xin)(xin)(xin)處(chu)理措施。

樓承板(ban)(ban)(ban)的(de)(de)使用(yong)(yong)是需(xu)(xu)要(yao)安裝的(de)(de)，那么如果要(yao)安裝就(jiu)要(yao)選(xuan)(xuan)擇合適的(de)(de)小配件，焊(han)后栓(shuan)釘(ding)(ding)(ding)高度大于壓(ya)型鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)波高30MM(留(liu)意挑選(xuan)(xuan)樓板(ban)(ban)(ban)的(de)(de)類(lei)型);栓(shuan)釘(ding)(ding)(ding)頂(ding)面混(hun)凝(ning)土保護層(ceng)不小于15MM(留(liu)意樓板(ban)(ban)(ban)總(zong)厚度)直徑不宜大于19MM。樓承板(ban)(ban)(ban)栓(shuan)釘(ding)(ding)(ding)類(lei)型有ф8、ф10、ф13、ф16、ф19、ф22、ф25，栓(shuan)釘(ding)(ding)(ding)一般(ban)在鋼(gang)(gang)(gang)(gang)結(jie)(jie)構修建中(zhong),遍及使用(yong)(yong)在柱腳和樓板(ban)(ban)(ban)中(zhong),一般(ban)剛(gang)度要(yao)求高的(de)(de)柱腳都選(xuan)(xuan)用(yong)(yong)鋼(gang)(gang)(gang)(gang)柱內伸至混(hun)凝(ning)土中(zhong)，鋼(gang)(gang)(gang)(gang)柱埋入混(hun)凝(ning)土的(de)(de)部位四周均(jun)布栓(shuan)釘(ding)(ding)(ding)。樓承板(ban)(ban)(ban)輕(qing)鋼(gang)(gang)(gang)(gang)結(jie)(jie)構常用(yong)(yong)厚度為0.8mm,1.0mm，1.2mm,荷載較大的(de)(de)情況下會用(yong)(yong)到1.5mm。一般(ban)需(xu)(xu)要(yao)用(yong)(yong)栓(shuan)釘(ding)(ding)(ding)與鋼(gang)(gang)(gang)(gang)梁銜接，板(ban)(ban)(ban)中(zhong)配少量鋼(gang)(gang)(gang)(gang)筋，上面澆(jiao)混(hun)凝(ning)土層(ceng)，總(zong)厚度約在100-200mm之間。