鍍(du)鋅(xin)(xin)(xin)帶(dai)(dai)鋼(gang)的(de)(de)鋅(xin)(xin)(xin)層特性 電鍍(du)鋅(xin)(xin)(xin)層是不能形成(cheng)鋅(xin)(xin)(xin)花的(de)(de)，熱鍍(du)鋅(xin)(xin)(xin)層則有鋅(xin)(xin)(xin)花，其形成(cheng)過程如下：當鍍(du)鋅(xin)(xin)(xin)帶(dai)(dai)從(cong)鋅(xin)(xin)(xin)鍋出(chu)來后，經(jing)氣刀(dao)的(de)(de)噴吹(chui)，大(da)量(liang)(liang)鋅(xin)(xin)(xin)液(ye)被吹(chui)回鋅(xin)(xin)(xin)鍋，這時(shi)帶(dai)(dai)鋼(gang)表(biao)面(mian)還有純鋅(xin)(xin)(xin)層，呈液(ye) 態附在(zai)鋼(gang)板表(biao)面(mian)，在(zai)鋼(gang)板表(biao)面(mian)形成(cheng)大(da)量(liang)(liang)結晶核，隨著(zhu)鋼(gang)板上升冷卻(que)，使結晶核慢慢長成(cheng)鋅(xin)(xin)(xin)花。冷卻(que)速(su)(su)度(du)(du)越(yue)快(kuai)鋅(xin)(xin)(xin)花越(yue)小(xiao)，冷卻(que)速(su)(su)度(du)(du)越(yue)慢鋅(xin)(xin)(xin)花越(yue)大(da)。熱鍍(du)鋅(xin)(xin)(xin)帶(dai)(dai)鋼(gang)在(zai)我國市場一直是緊缺品(pin)種。從(cong)20世紀90年(nian)代中期以來，每年(nian)都要(yao)從(cong)國外進口80-100萬(wan)t左(zuo)右。隨著(zhu)國內經(jing)濟的(de)(de)發展(zhan)，尤其是汽車、家電及建筑業的(de)(de)發展(zhan)，對鍍(du)鋅(xin)(xin)(xin)帶(dai)(dai)鋼(gang)的(de)(de)需求量(liang)(liang)也大(da)大(da)增加(jia)。

鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)是(shi)為防(fang)止(zhi)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)表(biao)面(mian)遭受(shou)腐蝕(shi)，延長(chang)其(qi)使用壽命，在鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)表(biao)面(mian)涂(tu)(tu)以一層金(jin)(jin)屬鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)，這(zhe)種(zhong)涂(tu)(tu)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)(de)薄鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)稱(cheng)為鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)(ban)。鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)也是(shi)用熱(re)浸(jin)法制(zhi)造(zao)，但(dan)在出槽(cao)(cao)后，立(li)即(ji)把它加熱(re)到500℃左右，使其(qi)生(sheng)成鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)和鐵的(de)(de)合金(jin)(jin)被(bei)膜。這(zhe)種(zhong)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)卷具有(you)良好(hao)的(de)(de)涂(tu)(tu)料(liao)的(de)(de)密(mi)著性(xing)和焊接(jie)性(xing)。合金(jin)(jin)化鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(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)用熱(re)浸(jin)法制(zhi)造(zao)，但(dan)在出槽(cao)(cao)后，立(li)即(ji)把它加熱(re)到500℃左右，使其(qi)生(sheng)成鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)和鐵的(de)(de)合金(jin)(jin)被(bei)膜。這(zhe)種(zhong)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)(ban)具有(you)良好(hao)的(de)(de)涂(tu)(tu)料(liao)的(de)(de)密(mi)著性(xing)和焊接(jie)性(xing)。熱(re)浸(jin)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。將薄鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)浸(jin)入熔(rong)解(jie)的(de)(de)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)槽(cao)(cao)中(zhong)，使其(qi)表(biao)面(mian)粘附一層鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)(de)薄鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。目前主(zhu)要采用連續(xu)(xu)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)工藝生(sheng)產，即(ji)把成卷的(de)(de)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)連續(xu)(xu)浸(jin)在熔(rong)解(jie)有(you)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)(de)鍍(du)(du)(du)(du)槽(cao)(cao)中(zhong)制(zhi)成鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。合金(jin)(jin)、復合鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。它是(shi)用鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)和其(qi)他金(jin)(jin)屬如鉛、鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)制(zhi)成合金(jin)(jin)乃至復合鍍(du)(du)(du)(du)成的(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(you)防(fang)銹性(xing)能，又有(you)良好(hao)的(de)(de)涂(tu)(tu)裝性(xing)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。遵義攀鋼熱鍍鋅這種鋼(gang)板(ban)(ban)也(ye)是用熱浸法制造(zao)，但在出(chu)槽后，立即把(ba)它加熱到500 ℃左右(you)，使其(qi)生成(cheng)鋅(xin)(xin)和鐵(tie)的合金被膜。這種鍍(du)(du)(du)鋅(xin)(xin)板(ban)(ban)具有(you)良好的涂料的密著(zhu)性(xing)(xing)和焊接(jie)性(xing)(xing);電(dian)鍍(du)(du)(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)。用電(dian)鍍(du)(du)(du)法制造(zao)這種鍍(du)(du)(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)具有(you)良好的加工(gong)性(xing)(xing)。但鍍(du)(du)(du)層較薄，耐腐蝕性(xing)(xing)不如(ru)熱浸法鍍(du)(du)(du)鋅(xin)(xin)板(ban)(ban);單面(mian)(mian)鍍(du)(du)(du)和雙(shuang)面(mian)(mian)差鍍(du)(du)(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)。單面(mian)(mian)鍍(du)(du)(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)，即只在一面(mian)(mian)鍍(du)(du)(du)鋅(xin)(xin)的產品。在焊接(jie)、涂裝、防銹處理、加工(gong)等(deng)方(fang)面(mian)(mian)，具有(you)比雙(shuang)面(mian)(mian)鍍(du)(du)(du)鋅(xin)(xin)板(ban)(ban)好的適應性(xing)(xing)。

鍍(du)鋅鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)為基板(ban)(ban)(ban)的彩涂(tu)(tu)(tu)(tu)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)，除有鋅保護外，鋅層(ceng)(ceng)(ceng)上(shang)的有機(ji)涂(tu)(tu)(tu)(tu)層(ceng)(ceng)(ceng)起了覆(fu)蓋隔(ge)離作用(yong)，可防止鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)生銹，使(shi)用(yong)壽命(ming)比鍍(du)鋅鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)更長，據(ju)介紹涂(tu)(tu)(tu)(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)的使(shi)用(yong)壽命(ming)比鍍(du)鋅鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)長50%。在連(lian)續機(ji)組(zu)上(shang)以(yi)冷(leng)軋帶(dai)鋼(gang)(gang)(gang)(gang)，鍍(du)鋅帶(dai)鋼(gang)(gang)(gang)(gang)（電鍍(du)鋅和(he)熱鍍(du)鋅）為基板(ban)(ban)(ban)，經過表面預(yu)處理(li)（脫脂和(he)化學處理(li)），用(yong)輥涂(tu)(tu)(tu)(tu)的方(fang)法，涂(tu)(tu)(tu)(tu)上(shang)一(yi)層(ceng)(ceng)(ceng)或(huo)多層(ceng)(ceng)(ceng)液(ye)態(tai)涂(tu)(tu)(tu)(tu)料，經過烘(hong)烤和(he)冷(leng)卻所得(de)的板(ban)(ban)(ban)材即為涂(tu)(tu)(tu)(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。由于涂(tu)(tu)(tu)(tu)層(ceng)(ceng)(ceng)可以(yi)有各種(zhong)不同的顏色，習慣上(shang)把(ba)涂(tu)(tu)(tu)(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)叫(jiao)做彩色涂(tu)(tu)(tu)(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。又由于涂(tu)(tu)(tu)(tu)層(ceng)(ceng)(ceng)是在鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)成型加工(gong)之(zhi)前進行的，在國外這叫(jiao)做預(yu)涂(tu)(tu)(tu)(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。

樓(lou)(lou)(lou)承(cheng)板鍍(du)鋅(xin)(xin)(xin)(xin)首要起到(dao)防(fang)腐(fu)的(de)效果，按標準組合(he)樓(lou)(lou)(lou)板與非組合(he)樓(lou)(lou)(lou)板壓型鋼(gang)板應(ying)選(xuan)(xuan)用(yong)(yong)熱鍍(du)鋅(xin)(xin)(xin)(xin)，不該選(xuan)(xuan)用(yong)(yong)電(dian)鍍(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板，其雙面(mian)鍍(du)鋅(xin)(xin)(xin)(xin)層(ceng)總含(han)量要滿足在使(shi)用(yong)(yong)期間不致(zhi)銹(xiu)損的(de)要求(qiu)。當(dang)(dang)作(zuo)為(wei)非組合(he)樓(lou)(lou)(lou)承(cheng)板時(shi)，鍍(du)鋅(xin)(xin)(xin)(xin)層(ceng)含(han)量可選(xuan)(xuan)用(yong)(yong)較低值;當(dang)(dang)為(wei)組合(he)樓(lou)(lou)(lou)承(cheng)板時(shi)，鍍(du)鋅(xin)(xin)(xin)(xin)層(ceng)含(han)量不該小于(yu)150g/m2。當(dang)(dang)為(wei)組合(he)樓(lou)(lou)(lou)板且(qie)使(shi)用(yong)(yong)環境(jing)條(tiao)件較為(wei)惡劣時(shi)，鍍(du)鋅(xin)(xin)(xin)(xin)層(ceng)含(han)量應(ying)選(xuan)(xuan)用(yong)(yong)上限(xian)值或(huo)更(geng)高(gao)值。更(geng)高(gao)的(de)鍍(du)鋅(xin)(xin)(xin)(xin)要求(qiu)，如雙面(mian)鍍(du)鋅(xin)(xin)(xin)(xin)量為(wei)300g/m2、350g/m2或(huo)鍍(du)鋁鋅(xin)(xin)(xin)(xin)(5%鋁)275g/m2、300g/m2等(deng)(deng)，較高(gao)的(de)鍍(du)層(ceng)量使(shi)組合(he)樓(lou)(lou)(lou)板有更(geng)長(chang)耐久性，同(tong)等(deng)(deng)量的(de)鍍(du)鋁鋅(xin)(xin)(xin)(xin)的(de)防(fang)銹(xiu)蝕才能大約兩倍于(yu)一(yi)般熱鍍(du)鋅(xin)(xin)(xin)(xin)。鍍(du)鋅(xin)(xin)(xin)(xin)量也不是越(yue)厚越(yue)好(hao)，當(dang)(dang)鍍(du)鋅(xin)(xin)(xin)(xin)量較厚時(shi)，抗剪連接(jie)(jie)(jie)件栓釘(ding)的(de)焊接(jie)(jie)(jie)質量就(jiu)很難保證，焊接(jie)(jie)(jie)時(shi)，宜選(xuan)(xuan)用(yong)(yong)局部除(chu)鋅(xin)(xin)(xin)(xin)處理(li)措施。

樓(lou)承板(ban)(ban)(ban)的(de)(de)(de)(de)使用(yong)是需要(yao)(yao)安裝(zhuang)的(de)(de)(de)(de)，那么如果要(yao)(yao)安裝(zhuang)就要(yao)(yao)選(xuan)擇合適的(de)(de)(de)(de)小配件(jian)，焊后(hou)栓(shuan)釘(ding)高(gao)度(du)(du)(du)(du)大(da)于壓型(xing)鋼(gang)(gang)(gang)板(ban)(ban)(ban)波高(gao)30MM(留意挑選(xuan)樓(lou)板(ban)(ban)(ban)的(de)(de)(de)(de)類型(xing));栓(shuan)釘(ding)頂面混凝(ning)土(tu)(tu)保護層不小于15MM(留意樓(lou)板(ban)(ban)(ban)總厚度(du)(du)(du)(du))直徑不宜大(da)于19MM。樓(lou)承板(ban)(ban)(ban)栓(shuan)釘(ding)類型(xing)有ф8、ф10、ф13、ф16、ф19、ф22、ф25，栓(shuan)釘(ding)一(yi)(yi)般在鋼(gang)(gang)(gang)結(jie)構(gou)修建中(zhong),遍及使用(yong)在柱(zhu)腳(jiao)和樓(lou)板(ban)(ban)(ban)中(zhong),一(yi)(yi)般剛度(du)(du)(du)(du)要(yao)(yao)求(qiu)高(gao)的(de)(de)(de)(de)柱(zhu)腳(jiao)都(dou)選(xuan)用(yong)鋼(gang)(gang)(gang)柱(zhu)內伸至(zhi)混凝(ning)土(tu)(tu)中(zhong)，鋼(gang)(gang)(gang)柱(zhu)埋(mai)入混凝(ning)土(tu)(tu)的(de)(de)(de)(de)部位(wei)四周均(jun)布栓(shuan)釘(ding)。樓(lou)承板(ban)(ban)(ban)輕鋼(gang)(gang)(gang)結(jie)構(gou)常用(yong)厚度(du)(du)(du)(du)為0.8mm,1.0mm，1.2mm,荷載較大(da)的(de)(de)(de)(de)情(qing)況(kuang)下(xia)會用(yong)到1.5mm。一(yi)(yi)般需要(yao)(yao)用(yong)栓(shuan)釘(ding)與鋼(gang)(gang)(gang)梁銜接，板(ban)(ban)(ban)中(zhong)配少量鋼(gang)(gang)(gang)筋，上面澆(jiao)混凝(ning)土(tu)(tu)層，總厚度(du)(du)(du)(du)約在100-200mm之間。