鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)是為防止鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)表面遭受腐蝕，延長其(qi)(qi)使(shi)用(yong)(yong)壽命(ming)，在(zai)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)表面涂以一層金(jin)屬(shu)鋅(xin)(xin)，這(zhe)種(zhong)涂鋅(xin)(xin)的(de)(de)薄鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)稱為鍍(du)(du)(du)(du)鋅(xin)(xin)板(ban)(ban)(ban)。鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)也是用(yong)(yong)熱浸法(fa)制造，但在(zai)出槽(cao)后(hou)，立(li)即把(ba)它(ta)加熱到500℃左右(you)，使(shi)其(qi)(qi)生(sheng)成(cheng)鋅(xin)(xin)和(he)鐵(tie)的(de)(de)合(he)(he)金(jin)被膜。這(zhe)種(zhong)鍍(du)(du)(du)(du)鋅(xin)(xin)卷具有(you)(you)良好的(de)(de)涂料(liao)的(de)(de)密著(zhu)性(xing)(xing)(xing)和(he)焊(han)接性(xing)(xing)(xing)。合(he)(he)金(jin)化鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。這(zhe)種(zhong)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)也是用(yong)(yong)熱浸法(fa)制造，但在(zai)出槽(cao)后(hou)，立(li)即把(ba)它(ta)加熱到500℃左右(you)，使(shi)其(qi)(qi)生(sheng)成(cheng)鋅(xin)(xin)和(he)鐵(tie)的(de)(de)合(he)(he)金(jin)被膜。這(zhe)種(zhong)鍍(du)(du)(du)(du)鋅(xin)(xin)板(ban)(ban)(ban)具有(you)(you)良好的(de)(de)涂料(liao)的(de)(de)密著(zhu)性(xing)(xing)(xing)和(he)焊(han)接性(xing)(xing)(xing)。熱浸鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。將(jiang)薄鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)浸入熔(rong)解的(de)(de)鋅(xin)(xin)槽(cao)中(zhong)，使(shi)其(qi)(qi)表面粘(zhan)附一層鋅(xin)(xin)的(de)(de)薄鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。目前(qian)主(zhu)要采用(yong)(yong)連續鍍(du)(du)(du)(du)鋅(xin)(xin)工(gong)藝(yi)生(sheng)產，即把(ba)成(cheng)卷的(de)(de)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)連續浸在(zai)熔(rong)解有(you)(you)鋅(xin)(xin)的(de)(de)鍍(du)(du)(du)(du)槽(cao)中(zhong)制成(cheng)鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。合(he)(he)金(jin)、復合(he)(he)鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。它(ta)是用(yong)(yong)鋅(xin)(xin)和(he)其(qi)(qi)他金(jin)屬(shu)如鉛、鋅(xin)(xin)制成(cheng)合(he)(he)金(jin)乃至復合(he)(he)鍍(du)(du)(du)(du)成(cheng)的(de)(de)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)。這(zhe)種(zhong)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)既具有(you)(you)防銹性(xing)(xing)(xing)能，又有(you)(you)良好的(de)(de)涂裝性(xing)(xing)(xing)能。

鍍(du)(du)鋅(xin)鋼板的(de)(de)表面鍍(du)(du)鋅(xin)主要采(cai)(cai)(cai)用(yong)的(de)(de)方(fang)法是熱(re)(re)鍍(du)(du)鋅(xin)。熱(re)(re)鍍(du)(du)鋅(xin)是由較(jiao)古老的(de)(de)熱(re)(re)鍍(du)(du)方(fang)法發展而來的(de)(de)，自(zi)從1836年(nian)法國把熱(re)(re)鍍(du)(du)鋅(xin)應用(yong)于(yu)工業(ye)以來，已經有(you)一百七十(shi)(shi)年(nian)的(de)(de)歷史了。然而，熱(re)(re)鍍(du)(du)鋅(xin)工業(ye)是近三十(shi)(shi)年(nian)來伴隨(sui)冷軋帶(dai)鋼的(de)(de)飛速發展而得到了大規模發展。鍍(du)(du)鋅(xin)溶(rong)液(ye)(ye)有(you)氰(qing)(qing)(qing)化(hua)物鍍(du)(du)液(ye)(ye)和無(wu)(wu)氰(qing)(qing)(qing)鍍(du)(du)液(ye)(ye)兩類(lei)。氰(qing)(qing)(qing)化(hua)物鍍(du)(du)液(ye)(ye)中分微(wei)氰(qing)(qing)(qing)、低氰(qing)(qing)(qing)、中氰(qing)(qing)(qing)、和高氰(qing)(qing)(qing)幾類(lei)。無(wu)(wu)氰(qing)(qing)(qing)鍍(du)(du)液(ye)(ye)有(you)堿(jian)性鋅(xin)酸鹽鍍(du)(du)液(ye)(ye)、銨鹽鍍(du)(du)液(ye)(ye)、硫酸鹽鍍(du)(du)液(ye)(ye)及無(wu)(wu)氨氯化(hua)物鍍(du)(du)液(ye)(ye)等。氰(qing)(qing)(qing)化(hua)鍍(du)(du)鋅(xin)溶(rong)液(ye)(ye)均鍍(du)(du)能力好，得到的(de)(de)鍍(du)(du)層光滑細(xi)致，在生產(chan)中被長(chang)期(qi)采(cai)(cai)(cai)用(yong)。但由于(yu)氰(qing)(qing)(qing)化(hua)物劇毒，對環境污(wu)染嚴重(zhong)，近年(nian)來已趨向于(yu)采(cai)(cai)(cai)用(yong)低氰(qing)(qing)(qing)、微(wei)氰(qing)(qing)(qing)、無(wu)(wu)氰(qing)(qing)(qing)鍍(du)(du)鋅(xin)溶(rong)液(ye)(ye)。

熱(re)鍍(du)鋅生產發展一直處于滯后狀態(tai)。20世(shi)紀(ji)50年代(dai)到60年代(dai)陸續建成(cheng)了13條單(dan)張鋼(gang)板熔劑法熱(re)鍍(du)鋅機組，能力(li)為10萬t/a，但因產量(liang)低、成(cheng)本高、質量(liang)差(cha)、污染環(huan)境、經濟效益(yi)差(cha)等(deng)缺(que)陷已先(xian)后停、轉產。從20世(shi)紀(ji)70年代(dai)末，我國才開始建造(zao)大型寬帶熱(re)鍍(du)鋅機組。熱(re)鍍(du)鋅帶鋼(gang)在我國市場一直是緊缺(que)品種(zhong)。從20世(shi)紀(ji)90年代(dai)中期以來，每年都要從國外(wai)進口80-100萬t左右。隨(sui)著國內經濟的發展，尤其是汽車、家電及建筑業的發展，對鍍(du)鋅帶鋼(gang)的需求(qiu)量(liang)也大大增加。

北碚鍍鋅鋼樓承板鋼結構柱網間距一般5~9.0m×8~15m，次梁間距3m，而樓承板下料長度為4.97~8.97m，運輸與安裝均較困難，尤其是帶由圓弧區垂直吊裝樓承板，由上而下在次梁狹間穿套比較困難，且打亂了次梁焊接正常工序。控制下料長度為3～6m，則可避免垂直運輸時在次梁間無法吊運的問題。 鍍鋅鋼廠家樓承板(ban)(ban)(ban)吊運時(shi)(shi)采用專(zhuan)用軟(ruan)吊索(suo)。每次吊裝(zhuang)時(shi)(shi)應檢查軟(ruan)吊索(suo)是否有撕(si)裂(lie)、割斷現象(xiang)。樓承板(ban)(ban)(ban)擱置在(zai)鋼(gang)梁上時(shi)(shi)應防止(zhi)探頭。鋪(pu)料時(shi)(shi)操作人(ren)員應系帶(dai)，并保證邊鋪(pu)設(she)邊固定在(zai)周邊繩上。 焊(han)接采用熔透(tou)點(dian)焊(han)連接，施(shi)焊(han)前(qian)應準備邊角料引(yin)弧試焊(han)，調整(zheng)施(shi)焊(han)電流.因樓承板(ban)(ban)(ban)底(di)部無水平(ping)模板(ban)(ban)(ban)及(ji)垂直支撐，澆(jiao)筑混(hun)凝土時(shi)(shi)布料不宜太(tai)集中，采用平(ping)板(ban)(ban)(ban)振(zhen)搗(dao)器(qi)及(ji)時(shi)(shi)分攤振(zhen)搗(dao)。

鍍(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)為(wei)(wei)基(ji)板(ban)的(de)彩涂(tu)鋼(gang)(gang)(gang)板(ban)，除有(you)鋅(xin)(xin)(xin)保護外(wai)(wai)，鋅(xin)(xin)(xin)層(ceng)(ceng)(ceng)上(shang)的(de)有(you)機(ji)涂(tu)層(ceng)(ceng)(ceng)起了覆蓋隔(ge)離(li)作用(yong)，可(ke)防止鋼(gang)(gang)(gang)板(ban)生(sheng)銹，使用(yong)壽命比鍍(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)更長，據介紹涂(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)板(ban)的(de)使用(yong)壽命比鍍(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)長50%。在連續(xu)機(ji)組(zu)上(shang)以冷軋帶(dai)鋼(gang)(gang)(gang)，鍍(du)鋅(xin)(xin)(xin)帶(dai)鋼(gang)(gang)(gang)（電鍍(du)鋅(xin)(xin)(xin)和(he)熱鍍(du)鋅(xin)(xin)(xin)）為(wei)(wei)基(ji)板(ban)，經(jing)過(guo)(guo)表面(mian)預處理(li)（脫脂和(he)化學處理(li)），用(yong)輥涂(tu)的(de)方(fang)法，涂(tu)上(shang)一層(ceng)(ceng)(ceng)或多層(ceng)(ceng)(ceng)液態涂(tu)料，經(jing)過(guo)(guo)烘(hong)烤和(he)冷卻所得(de)的(de)板(ban)材即為(wei)(wei)涂(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)板(ban)。由(you)于(yu)涂(tu)層(ceng)(ceng)(ceng)可(ke)以有(you)各種不(bu)同(tong)的(de)顏色，習慣上(shang)把涂(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)板(ban)叫做彩色涂(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)板(ban)。又由(you)于(yu)涂(tu)層(ceng)(ceng)(ceng)是在鋼(gang)(gang)(gang)板(ban)成型(xing)加工之前進行的(de)，在國外(wai)(wai)這叫做預涂(tu)層(ceng)(ceng)(ceng)鋼(gang)(gang)(gang)板(ban)。