樓(lou)承板(ban)(ban)(ban)(ban)鍍(du)(du)(du)鋅(xin)(xin)首要(yao)起到防腐的(de)效果，按標準組(zu)(zu)(zu)合樓(lou)板(ban)(ban)(ban)(ban)與(yu)非組(zu)(zu)(zu)合樓(lou)板(ban)(ban)(ban)(ban)壓(ya)型鋼板(ban)(ban)(ban)(ban)應選(xuan)用(yong)熱(re)鍍(du)(du)(du)鋅(xin)(xin)，不該選(xuan)用(yong)電鍍(du)(du)(du)鋅(xin)(xin)鋼板(ban)(ban)(ban)(ban)，其(qi)雙面鍍(du)(du)(du)鋅(xin)(xin)層總含(han)(han)量要(yao)滿足(zu)在使用(yong)期間不致(zhi)銹損(sun)的(de)要(yao)求。當(dang)作為(wei)(wei)非組(zu)(zu)(zu)合樓(lou)承板(ban)(ban)(ban)(ban)時，鍍(du)(du)(du)鋅(xin)(xin)層含(han)(han)量可選(xuan)用(yong)較低(di)值(zhi)(zhi);當(dang)為(wei)(wei)組(zu)(zu)(zu)合樓(lou)承板(ban)(ban)(ban)(ban)時，鍍(du)(du)(du)鋅(xin)(xin)層含(han)(han)量不該小于150g/m2。當(dang)為(wei)(wei)組(zu)(zu)(zu)合樓(lou)板(ban)(ban)(ban)(ban)且使用(yong)環(huan)境條(tiao)件(jian)較為(wei)(wei)惡(e)劣時，鍍(du)(du)(du)鋅(xin)(xin)層含(han)(han)量應選(xuan)用(yong)上限值(zhi)(zhi)或更高(gao)值(zhi)(zhi)。更高(gao)的(de)鍍(du)(du)(du)鋅(xin)(xin)要(yao)求，如雙面鍍(du)(du)(du)鋅(xin)(xin)量為(wei)(wei)300g/m2、350g/m2或鍍(du)(du)(du)鋁(lv)(lv)鋅(xin)(xin)(5%鋁(lv)(lv))275g/m2、300g/m2等，較高(gao)的(de)鍍(du)(du)(du)層量使組(zu)(zu)(zu)合樓(lou)板(ban)(ban)(ban)(ban)有更長(chang)耐久性，同(tong)等量的(de)鍍(du)(du)(du)鋁(lv)(lv)鋅(xin)(xin)的(de)防銹蝕(shi)才(cai)能大約(yue)兩倍(bei)于一般熱(re)鍍(du)(du)(du)鋅(xin)(xin)。鍍(du)(du)(du)鋅(xin)(xin)量也不是越(yue)厚越(yue)好(hao)，當(dang)鍍(du)(du)(du)鋅(xin)(xin)量較厚時，抗剪連接件(jian)栓釘的(de)焊接質量就很難保證，焊接時，宜選(xuan)用(yong)局部除鋅(xin)(xin)處理措施。

熱(re)浸(jin)鍍(du)(du)(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)將薄(bo)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)浸(jin)入熔解(jie)的(de)(de)(de)(de)鋅(xin)(xin)(xin)槽中(zhong)，使其表面(mian)(mian)粘(zhan)附(fu)一(yi)層鋅(xin)(xin)(xin)的(de)(de)(de)(de)薄(bo)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。目前主要采用連續(xu)鍍(du)(du)(du)鋅(xin)(xin)(xin)工藝生產(chan)，即把(ba)成(cheng)卷的(de)(de)(de)(de)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)連續(xu)浸(jin)在(zai)熔解(jie)有(you)鋅(xin)(xin)(xin)的(de)(de)(de)(de)鍍(du)(du)(du)槽中(zhong)制(zhi)成(cheng)鍍(du)(du)(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban);合金(jin)化鍍(du)(du)(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。這(zhe)種(zhong)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)也是用熱(re)浸(jin)法(fa)制(zhi)造，但在(zai)出槽后，立即把(ba)它加熱(re)到(dao)500 ℃左右，使其生成(cheng)鋅(xin)(xin)(xin)和(he)鐵的(de)(de)(de)(de)合金(jin)被膜。這(zhe)種(zhong)鍍(du)(du)(du)鋅(xin)(xin)(xin)板(ban)(ban)(ban)(ban)具(ju)有(you)良好的(de)(de)(de)(de)涂料的(de)(de)(de)(de)密著性(xing)(xing)和(he)焊接性(xing)(xing);電鍍(du)(du)(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。用電鍍(du)(du)(du)法(fa)制(zhi)造這(zhe)種(zhong)鍍(du)(du)(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)具(ju)有(you)良好的(de)(de)(de)(de)加工性(xing)(xing)。但鍍(du)(du)(du)層較薄(bo)，耐腐蝕性(xing)(xing)不(bu)如(ru)熱(re)浸(jin)法(fa)鍍(du)(du)(du)鋅(xin)(xin)(xin)板(ban)(ban)(ban)(ban);單面(mian)(mian)鍍(du)(du)(du)和(he)雙面(mian)(mian)差(cha)鍍(du)(du)(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。單面(mian)(mian)鍍(du)(du)(du)鋅(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)，即只在(zai)一(yi)面(mian)(mian)鍍(du)(du)(du)鋅(xin)(xin)(xin)的(de)(de)(de)(de)產(chan)品。在(zai)焊接、涂裝、防銹處理、加工等方面(mian)(mian)，具(ju)有(you)比(bi)雙面(mian)(mian)鍍(du)(du)(du)鋅(xin)(xin)(xin)板(ban)(ban)(ban)(ban)好的(de)(de)(de)(de)適應性(xing)(xing)。

冷軋板批發鍍鋅帶鋼的鋅層特性 電鍍鋅層是不能形成鋅花的，熱鍍鋅層則有鋅花，其形成過程如下：當鍍鋅帶從鋅鍋出來后，經氣刀的噴吹，大量鋅液被吹回鋅鍋，這時帶鋼表面還有純鋅層，呈液 態附在鋼板表面，在鋼板表面形成大量結晶核，隨著鋼板上升冷卻，使結晶核慢慢長成鋅花。自貢攀鋼冷軋板冷(leng)卻速度(du)越快(kuai)鋅(xin)(xin)花(hua)(hua)越小，冷(leng)卻速度(du)越慢鋅(xin)(xin)花(hua)(hua)越大(da)。熱鍍(du)鋅(xin)(xin)帶鋼在(zai)我(wo)國市場(chang)一直(zhi)是緊(jin)缺品種。從(cong)20世紀90年(nian)代中期以來，每年(nian)都要(yao)從(cong)國外進(jin)口80-100萬t左右(you)。隨著國內經(jing)濟(ji)的(de)發(fa)展(zhan)(zhan)，尤其(qi)是汽車、家電及建筑業(ye)的(de)發(fa)展(zhan)(zhan)，對鍍(du)鋅(xin)(xin)帶鋼的(de)需求(qiu)量(liang)也大(da)大(da)增加(jia)。

鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)方(fang)管(guan)是一種(zhong)具以熱軋(ya)或(huo)冷軋(ya)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)帶鋼或(huo)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)卷(juan)板(ban)為(wei)坯料經冷彎曲加工(gong)成(cheng)(cheng)型后再經高(gao)頻焊(han)接制成(cheng)(cheng)的(de)方(fang)形截面(mian)形狀尺寸的(de)空(kong)心(xin)方(fang)形的(de)截面(mian)型鋼鋼管(guan)；鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)卷(juan)或(huo)將事(shi)先做好的(de)冷彎空(kong)心(xin)型鋼管(guan)再經熱浸(jin)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)加工(gong)而成(cheng)(cheng)的(de)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)方(fang)矩(ju)管(guan)。鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)量是表(biao)示鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)板(ban)鋅(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)厚度的(de)一個普遍采用的(de)有(you)效方(fang)法。鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)量的(de)單位為(wei)g/m2。鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)通過鈍化(hua)(hua)處(chu)理(li)，可減少(shao)潮溫貯運條件下產(chan)生折銹蝕(shi)(白銹) 。但這種(zhong)化(hua)(hua)學處(chu)理(li)的(de)防(fang)腐蝕(shi)性(xing)能是有(you)限的(de)，而且，妨礙大多數(shu)涂料的(de)附(fu)著性(xing)。這種(zhong)處(chu)理(li)一般不用在鋅(xin)(xin)(xin)(xin)(xin)(xin)鐵合(he)金(jin)鍍(du)(du)層(ceng)(ceng)(ceng)，除(chu)光(guang)整表(biao)面(mian)外，作為(wei)常規，生產(chan)廠對其(qi)他類型的(de)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)層(ceng)(ceng)(ceng)均進行鈍化(hua)(hua)處(chu)理(li)。