鍍(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)(ban)為基板(ban)(ban)(ban)的(de)彩(cai)涂(tu)(tu)(tu)(tu)鋼(gang)板(ban)(ban)(ban)，除有(you)(you)鋅(xin)(xin)保護外(wai)，鋅(xin)(xin)層上的(de)有(you)(you)機(ji)涂(tu)(tu)(tu)(tu)層起了覆蓋隔離作用(yong)，可(ke)防止(zhi)鋼(gang)板(ban)(ban)(ban)生銹，使(shi)用(yong)壽命比鍍(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)(ban)更(geng)長(chang)，據介紹(shao)涂(tu)(tu)(tu)(tu)層鋼(gang)板(ban)(ban)(ban)的(de)使(shi)用(yong)壽命比鍍(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)(ban)長(chang)50%。在連續機(ji)組(zu)上以冷(leng)軋帶鋼(gang)，鍍(du)鋅(xin)(xin)帶鋼(gang)（電鍍(du)鋅(xin)(xin)和熱(re)鍍(du)鋅(xin)(xin)）為基板(ban)(ban)(ban)，經過表面預處理（脫脂(zhi)和化學(xue)處理），用(yong)輥涂(tu)(tu)(tu)(tu)的(de)方法，涂(tu)(tu)(tu)(tu)上一(yi)層或多(duo)層液態涂(tu)(tu)(tu)(tu)料，經過烘烤(kao)和冷(leng)卻所得的(de)板(ban)(ban)(ban)材即為涂(tu)(tu)(tu)(tu)層鋼(gang)板(ban)(ban)(ban)。由于涂(tu)(tu)(tu)(tu)層可(ke)以有(you)(you)各種不(bu)同的(de)顏色，習慣(guan)上把涂(tu)(tu)(tu)(tu)層鋼(gang)板(ban)(ban)(ban)叫(jiao)做(zuo)彩(cai)色涂(tu)(tu)(tu)(tu)層鋼(gang)板(ban)(ban)(ban)。又(you)由于涂(tu)(tu)(tu)(tu)層是在鋼(gang)板(ban)(ban)(ban)成(cheng)型加工之前(qian)進行的(de)，在國外(wai)這叫(jiao)做(zuo)預涂(tu)(tu)(tu)(tu)層鋼(gang)板(ban)(ban)(ban)。

鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)(ban)是為(wei)防(fang)止鋼(gang)板(ban)(ban)表面(mian)(mian)遭受腐蝕，延長(chang)其(qi)使(shi)用壽命(ming)，在(zai)鋼(gang)板(ban)(ban)表面(mian)(mian)涂以(yi)(yi)一層(ceng)(ceng)金屬鋅(xin)(xin)(xin)(xin)，這種(zhong)涂鋅(xin)(xin)(xin)(xin)的薄(bo)鋼(gang)板(ban)(ban)稱為(wei)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)板(ban)(ban)。按生(sheng)(sheng)(sheng)產及加工(gong)方法可分為(wei)以(yi)(yi)下(xia)幾類：熱浸鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)(ban)。將薄(bo)鋼(gang)板(ban)(ban)浸入熔 微商(shang)貨源解(jie)的鋅(xin)(xin)(xin)(xin)槽中(zhong)，使(shi)其(qi)表面(mian)(mian)粘(zhan)附一層(ceng)(ceng)鋅(xin)(xin)(xin)(xin)的薄(bo)鋼(gang)板(ban)(ban)。目前主要采用連(lian)續鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)工(gong)藝生(sheng)(sheng)(sheng)產，即把成卷的鋼(gang)板(ban)(ban)連(lian)續浸在(zai)熔解(jie)有鋅(xin)(xin)(xin)(xin)的鍍(du)(du)(du)槽中(zhong)制成鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)(ban)；合(he)金化鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)(ban)。這種(zhong)鋼(gang)板(ban)(ban)也是用熱浸法制造，但在(zai)出槽后，立(li)即把它(ta)加熱到５００℃左(zuo)右，使(shi)其(qi)生(sheng)(sheng)(sheng)成鋅(xin)(xin)(xin)(xin)和鐵(tie)的合(he)金被(bei)膜。這種(zhong)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)板(ban)(ban)具有良好的涂料的密(mi)著性(xing)和焊(han)接性(xing)。

樓(lou)(lou)承(cheng)板(ban)(ban)(ban)(ban)鍍(du)鋅(xin)(xin)首(shou)要起(qi)到防腐的(de)(de)效果，按標準組合樓(lou)(lou)板(ban)(ban)(ban)(ban)與非組合樓(lou)(lou)板(ban)(ban)(ban)(ban)壓型鋼(gang)板(ban)(ban)(ban)(ban)應選(xuan)用(yong)(yong)(yong)熱鍍(du)鋅(xin)(xin)，不(bu)(bu)該選(xuan)用(yong)(yong)(yong)電鍍(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)(ban)(ban)，其雙面鍍(du)鋅(xin)(xin)層總含(han)(han)(han)量(liang)(liang)(liang)(liang)要滿足在使用(yong)(yong)(yong)期間不(bu)(bu)致銹損的(de)(de)要求(qiu)。當作為(wei)非組合樓(lou)(lou)承(cheng)板(ban)(ban)(ban)(ban)時(shi)(shi)，鍍(du)鋅(xin)(xin)層含(han)(han)(han)量(liang)(liang)(liang)(liang)可選(xuan)用(yong)(yong)(yong)較(jiao)(jiao)低值(zhi);當為(wei)組合樓(lou)(lou)承(cheng)板(ban)(ban)(ban)(ban)時(shi)(shi)，鍍(du)鋅(xin)(xin)層含(han)(han)(han)量(liang)(liang)(liang)(liang)不(bu)(bu)該小于150g/m2。當為(wei)組合樓(lou)(lou)板(ban)(ban)(ban)(ban)且使用(yong)(yong)(yong)環(huan)境條件(jian)較(jiao)(jiao)為(wei)惡劣時(shi)(shi)，鍍(du)鋅(xin)(xin)層含(han)(han)(han)量(liang)(liang)(liang)(liang)應選(xuan)用(yong)(yong)(yong)上限值(zhi)或(huo)更高(gao)(gao)值(zhi)。更高(gao)(gao)的(de)(de)鍍(du)鋅(xin)(xin)要求(qiu)，如雙面鍍(du)鋅(xin)(xin)量(liang)(liang)(liang)(liang)為(wei)300g/m2、350g/m2或(huo)鍍(du)鋁鋅(xin)(xin)(5%鋁)275g/m2、300g/m2等，較(jiao)(jiao)高(gao)(gao)的(de)(de)鍍(du)層量(liang)(liang)(liang)(liang)使組合樓(lou)(lou)板(ban)(ban)(ban)(ban)有更長(chang)耐久(jiu)性，同等量(liang)(liang)(liang)(liang)的(de)(de)鍍(du)鋁鋅(xin)(xin)的(de)(de)防銹蝕才(cai)能大(da)約兩倍于一般熱鍍(du)鋅(xin)(xin)。鍍(du)鋅(xin)(xin)量(liang)(liang)(liang)(liang)也不(bu)(bu)是越厚越好，當鍍(du)鋅(xin)(xin)量(liang)(liang)(liang)(liang)較(jiao)(jiao)厚時(shi)(shi)，抗剪連接(jie)件(jian)栓釘的(de)(de)焊接(jie)質量(liang)(liang)(liang)(liang)就很(hen)難保證(zheng)，焊接(jie)時(shi)(shi)，宜選(xuan)用(yong)(yong)(yong)局部除(chu)鋅(xin)(xin)處(chu)理措施。

仁懷鍍鋅管重慶鍍鋅卷主要有：脫落、劃傷、鈍化斑、鋅粒、厚邊、氣刀條痕、氣刀刮痕、露鋼、夾雜、機械損傷、鋼基性能不良、浪邊、瓢曲、尺寸不合、壓印、鋅層厚度不合、輥印等。鍍鋅管批發鋅(xin)(xin)(xin)層脫落的(de)(de)(de)主(zhu)要原(yuan)因有(you)：表(biao)面氧(yang)(yang)化(hua)(hua)(hua)、有(you)硅化(hua)(hua)(hua)合物、冷扎乳化(hua)(hua)(hua)液(ye)(ye)太(tai)臟、NOF段(duan)氧(yang)(yang)化(hua)(hua)(hua)氣(qi)(qi)氛及保護氣(qi)(qi)體露點(dian)太(tai)高(gao)、空燃(ran)比(bi)不合理(li)、氫(qing)氣(qi)(qi)流(liu)量偏(pian)低、爐(lu)子有(you)氧(yang)(yang)滲入，帶(dai)鋼入鍋溫度偏(pian)低，RWP段(duan)爐(lu)壓偏(pian)低及爐(lu)門吸風、NOF段(duan)爐(lu)溫偏(pian)低，油脂蒸(zheng)發(fa)不盡、鋅(xin)(xin)(xin)鍋鋁含量偏(pian)低、機組速(su)度太(tai)快、還(huan)原(yuan)不充分、鋅(xin)(xin)(xin)液(ye)(ye)中停留時間太(tai)短、鍍(du)層偏(pian)厚。白銹和黑(hei)斑產(chan)生的(de)(de)(de)原(yuan)因有(you)：黑(hei)斑是白銹進一步(bu)氧(yang)(yang)化(hua)(hua)(hua)形成的(de)(de)(de)鍍(du)鋅(xin)(xin)(xin)板(ban)的(de)(de)(de)特點(dian)與用(yong)(yong)途。鍍(du)鋅(xin)(xin)(xin)卷(juan)板(ban)是以熱軋鋼帶(dai)或冷軋鋼帶(dai)為基板(ban)，經過連續熱浸鍍(du)鋅(xin)(xin)(xin)工藝而生產(chan)出來的(de)(de)(de)， 產(chan)品具有(you)耐腐蝕強、 表(biao)面質量好、有(you)利(li)于深(shen)加工、經濟實用(yong)(yong)等(deng)特點(dian)。