鍍(du)鋅(xin)(xin)(xin)方管(guan)是(shi)(shi)一種(zhong)具以(yi)熱軋或冷(leng)軋鍍(du)鋅(xin)(xin)(xin)帶鋼(gang)(gang)或鍍(du)鋅(xin)(xin)(xin)卷(juan)板(ban)為(wei)坯(pi)料(liao)經(jing)(jing)冷(leng)彎曲(qu)加工(gong)(gong)成型(xing)后再(zai)經(jing)(jing)高頻焊接制成的(de)方形(xing)截面形(xing)狀尺寸的(de)空心(xin)方形(xing)的(de)截面型(xing)鋼(gang)(gang)鋼(gang)(gang)管(guan);或將事(shi)先(xian)做好的(de)冷(leng)彎空心(xin)型(xing)鋼(gang)(gang)管(guan)再(zai)經(jing)(jing)熱浸鍍(du)鋅(xin)(xin)(xin)加工(gong)(gong)而(er)成的(de)鍍(du)鋅(xin)(xin)(xin)方矩(ju)管(guan)。鍍(du)鋅(xin)(xin)(xin)卷(juan)廠產量隨著國(guo)民生(sheng)活(huo)水平不(bu)斷提高和城市化建(jian)設(she)的(de)不(bu)斷推進，從現在的(de)1.6億噸每年，增加到3億噸甚至更多也不(bu)是(shi)(shi)什(shen)么很遙遠的(de)夢想。作(zuo)為(wei)煉鋼(gang)(gang)原料(liao)的(de)鐵礦石與廢(fei)鋼(gang)(gang)，前(qian)者是(shi)(shi)不(bu)可(ke)的(de)資(zi)源，后者是(shi)(shi)可(ke)以(yi)循環利用(yong)(yong)的(de)資(zi)源。無論從環保角度還是(shi)(shi)從鋼(gang)(gang)企(qi)的(de)運作(zuo)成本上(shang)看，廢(fei)鋼(gang)(gang)都有著礦石所無法(fa)比擬的(de)優勢。發(fa)展高強度熱鍍(du)鋅(xin)(xin)(xin)鋼(gang)(gang)板(ban)。隨著汽車工(gong)(gong)業逐漸向、節能方向發(fa)展，對汽車用(yong)(yong)鍍(du)鋅(xin)(xin)(xin)鋼(gang)(gang)板(ban)性能要求也進一步(bu)提高。為(wei)了汽車板(ban)的(de)耐腐蝕(shi)性，將擴大熱鍍(du)鋅(xin)(xin)(xin)鋼(gang)(gang)板(ban)的(de)使用(yong)(yong)率。

首(shou)先，在鋼結構(gou)樓層板(ban)(ban)(ban)(ban)(ban)中要(yao)達到耐(nai)火1.5小時，總(zong)的(de)來說(shuo)可以選擇開(kai)口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)、縮口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)、閉口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)三大類。規范上(shang)混凝土要(yao)高(gao)于(yu)(yu)開(kai)口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)肋(lei)頂之上(shang)80mm，并且(qie)板(ban)(ban)(ban)(ban)(ban)底(di)需(xu)配置板(ban)(ban)(ban)(ban)(ban)底(di)受力筋。還有(you)一種就是(shi)(shi)再開(kai)口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)底(di)部(bu)刷防(fang)(fang)火涂料，涂料厚度大于(yu)(yu)等于(yu)(yu)15,這(zhe)樣的(de)話，只要(yao)達到構(gou)造要(yao)求(qiu)高(gao)于(yu)(yu)肋(lei)頂5公分就可以了。而縮口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)和閉口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)，只需(xu)要(yao)總(zong)的(de)樓板(ban)(ban)(ban)(ban)(ban)厚度大于(yu)(yu)等于(yu)(yu)110即可，但(dan)(dan)是(shi)(shi)縮口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)雖(sui)然在防(fang)(fang)火方面比開(kai)口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)要(yao)好。但(dan)(dan)是(shi)(shi)底(di)部(bu)還是(shi)(shi)需(xu)要(yao)加板(ban)(ban)(ban)(ban)(ban)底(di)受力筋，而閉口(kou)(kou)板(ban)(ban)(ban)(ban)(ban)則(ze)不需(xu)要(yao)。

隨著(zhu)鋼(gang)結(jie)構(gou)(gou)在(zai)建筑(zhu)材(cai)料(liao)中的興(xing)起，越(yue)來越(yue)多的人(ren)選擇使用(yong)鋼(gang)結(jie)構(gou)(gou)樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)了(le)，鋼(gang)結(jie)構(gou)(gou)構(gou)(gou)件(jian)工廠產(chan)業化生(sheng)產(chan)大大縮(suo)短了(le)工程工期(qi)，而樓(lou)板(ban)(ban)(ban)(ban)(ban)(ban)的施工方(fang)法卻(que)成為影響工期(qi)的重要因(yin)素(su)。采(cai)用(yong)那一代(dai)樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)對于樓(lou)板(ban)(ban)(ban)(ban)(ban)(ban)的耐火性能(neng)也(ye)(ye)有(you)區別。樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)的厚(hou)度(du)(du)一般都是(shi)(shi)按保險(xian)起見設(she)計的比較厚(hou)，正常(chang)情況下鋼(gang)梁之間的跨度(du)(du)在(zai)2m以(yi)內樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)厚(hou)度(du)(du)在(zai)0.75-0.8mm就(jiu)可以(yi)了(le)，2-2.5m樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)厚(hou)度(du)(du)用(yong)0.8-1.0就(jiu)可以(yi)了(le)，跨度(du)(du)在(zai)3-4米樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)厚(hou)度(du)(du)用(yong)1.5mm，超過5m的跨度(du)(du)是(shi)(shi)用(yong)臨時(shi)支撐，因(yin)素(su)就(jiu)是(shi)(shi)混泥(ni)土澆筑(zhu)的高度(du)(du)，混泥(ni)土澆筑(zhu)的越(yue)高，樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)所需要的厚(hou)度(du)(du)也(ye)(ye)就(jiu)越(yue)厚(hou)，還有(you)一個大家容易(yi)忽略的因(yin)素(su)就(jiu)是(shi)(shi)螺(luo)釘(ding)的好壞也(ye)(ye)是(shi)(shi)決定(ding)樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)厚(hou)度(du)(du)的，螺(luo)釘(ding)越(yue)好樓(lou)承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)(ban)(ban)的承(cheng)(cheng)(cheng)載力就(jiu)越(yue)強。

C型鋼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。北京攀鋼C型鋼這(zhe)種鋼(gang)(gang)板(ban)也是用熱(re)(re)浸法(fa)制(zhi)造(zao)，但在出(chu)槽后，立即把它(ta)加(jia)熱(re)(re)到500 ℃左右，使(shi)其(qi)生成鋅(xin)和鐵的(de)合金被膜(mo)。這(zhe)種鍍(du)鋅(xin)板(ban)具有良(liang)(liang)好的(de)涂(tu)料的(de)密著性和焊(han)接性;電(dian)鍍(du)鋅(xin)鋼(gang)(gang)板(ban)。用電(dian)鍍(du)法(fa)制(zhi)造(zao)這(zhe)種鍍(du)鋅(xin)鋼(gang)(gang)板(ban)具有良(liang)(liang)好的(de)加(jia)工性。但鍍(du)層較薄，耐腐(fu)蝕(shi)性不如熱(re)(re)浸法(fa)鍍(du)鋅(xin)板(ban);單(dan)面(mian)(mian)(mian)(mian)鍍(du)和雙(shuang)(shuang)面(mian)(mian)(mian)(mian)差鍍(du)鋅(xin)鋼(gang)(gang)板(ban)。單(dan)面(mian)(mian)(mian)(mian)鍍(du)鋅(xin)鋼(gang)(gang)板(ban)，即只在一面(mian)(mian)(mian)(mian)鍍(du)鋅(xin)的(de)產(chan)品。在焊(han)接、涂(tu)裝、防(fang)銹處理、加(jia)工等方(fang)面(mian)(mian)(mian)(mian)，具有比雙(shuang)(shuang)面(mian)(mian)(mian)(mian)鍍(du)鋅(xin)板(ban)好的(de)適(shi)應性。

重慶鍍(du)(du)鋅(xin)(xin)(xin)卷主要有(you)(you)：脫落、劃傷(shang)、鈍化(hua)斑、鋅(xin)(xin)(xin)粒、厚(hou)(hou)邊(bian)、氣刀(dao)條痕、氣刀(dao)刮痕、露鋼(gang)、夾雜、機(ji)(ji)械(xie)損傷(shang)、鋼(gang)基(ji)性能不(bu)良、浪(lang)邊(bian)、瓢曲、尺寸不(bu)合(he)、壓(ya)印(yin)、鋅(xin)(xin)(xin)層厚(hou)(hou)度不(bu)合(he)、輥(gun)印(yin)等。鋅(xin)(xin)(xin)層脫落的(de)(de)主要原因有(you)(you)：表面(mian)氧化(hua)、有(you)(you)硅(gui)化(hua)合(he)物、冷扎乳(ru)化(hua)液太(tai)臟、NOF段氧化(hua)氣氛及(ji)保護氣體露點太(tai)高、空(kong)燃比不(bu)合(he)理、氫(qing)氣流量(liang)(liang)偏(pian)(pian)低、爐子有(you)(you)氧滲入，帶(dai)鋼(gang)入鍋(guo)溫度偏(pian)(pian)低，RWP段爐壓(ya)偏(pian)(pian)低及(ji)爐門吸風、NOF段爐溫偏(pian)(pian)低，油脂蒸發不(bu)盡、鋅(xin)(xin)(xin)鍋(guo)鋁含量(liang)(liang)偏(pian)(pian)低、機(ji)(ji)組速度太(tai)快(kuai)、還原不(bu)充分、鋅(xin)(xin)(xin)液中停留(liu)時間太(tai)短、鍍(du)(du)層偏(pian)(pian)厚(hou)(hou)。白(bai)(bai)銹和黑斑產生的(de)(de)原因有(you)(you)：黑斑是白(bai)(bai)銹進一(yi)步(bu)氧化(hua)形成的(de)(de)鍍(du)(du)鋅(xin)(xin)(xin)板的(de)(de)特(te)點與用(yong)途。鍍(du)(du)鋅(xin)(xin)(xin)卷板是以熱軋鋼(gang)帶(dai)或冷軋鋼(gang)帶(dai)為基(ji)板，經(jing)過連續(xu)熱浸鍍(du)(du)鋅(xin)(xin)(xin)工(gong)藝而(er)生產出來的(de)(de)， 產品具有(you)(you)耐(nai)腐蝕強(qiang)、 表面(mian)質量(liang)(liang)好、有(you)(you)利于深加工(gong)、經(jing)濟實用(yong)等特(te)點。

鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)是為防(fang)止鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)表面遭受腐蝕，延長其使用(yong)(yong)壽命，在鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)表面涂(tu)以一層金(jin)(jin)屬鋅(xin)(xin)(xin)(xin)(xin)，這(zhe)種(zhong)涂(tu)鋅(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)(de)(de)(de)薄鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)稱為鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)。鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)也是用(yong)(yong)熱(re)浸法制造，但(dan)在出槽(cao)(cao)后，立即(ji)把它(ta)(ta)加(jia)熱(re)到500℃左右，使其生成鋅(xin)(xin)(xin)(xin)(xin)和(he)(he)鐵的(de)(de)(de)(de)(de)(de)合(he)(he)(he)(he)金(jin)(jin)被膜。這(zhe)種(zhong)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)卷(juan)具有良(liang)好的(de)(de)(de)(de)(de)(de)涂(tu)料(liao)的(de)(de)(de)(de)(de)(de)密著性(xing)和(he)(he)焊接性(xing)。合(he)(he)(he)(he)金(jin)(jin)化(hua)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。這(zhe)種(zhong)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)也是用(yong)(yong)熱(re)浸法制造，但(dan)在出槽(cao)(cao)后，立即(ji)把它(ta)(ta)加(jia)熱(re)到500℃左右，使其生成鋅(xin)(xin)(xin)(xin)(xin)和(he)(he)鐵的(de)(de)(de)(de)(de)(de)合(he)(he)(he)(he)金(jin)(jin)被膜。這(zhe)種(zhong)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)具有良(liang)好的(de)(de)(de)(de)(de)(de)涂(tu)料(liao)的(de)(de)(de)(de)(de)(de)密著性(xing)和(he)(he)焊接性(xing)。熱(re)浸鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。將(jiang)薄鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)浸入熔(rong)解(jie)的(de)(de)(de)(de)(de)(de)鋅(xin)(xin)(xin)(xin)(xin)槽(cao)(cao)中(zhong)(zhong)，使其表面粘附一層鋅(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)(de)(de)(de)薄鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。目(mu)前主要采用(yong)(yong)連續鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)工(gong)藝生產(chan)，即(ji)把成卷(juan)的(de)(de)(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)連續浸在熔(rong)解(jie)有鋅(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)(de)(de)(de)鍍(du)(du)(du)槽(cao)(cao)中(zhong)(zhong)制成鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。合(he)(he)(he)(he)金(jin)(jin)、復合(he)(he)(he)(he)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。它(ta)(ta)是用(yong)(yong)鋅(xin)(xin)(xin)(xin)(xin)和(he)(he)其他金(jin)(jin)屬如鉛、鋅(xin)(xin)(xin)(xin)(xin)制成合(he)(he)(he)(he)金(jin)(jin)乃至復合(he)(he)(he)(he)鍍(du)(du)(du)成的(de)(de)(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。這(zhe)種(zhong)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)既具有防(fang)銹性(xing)能，又有良(liang)好的(de)(de)(de)(de)(de)(de)涂(tu)裝性(xing)能。