鍍鋅(xin)(xin)(xin)(xin)(xin)帶鋼(gang)(gang)(gang)的鋅(xin)(xin)(xin)(xin)(xin)層特性 電(dian)鍍鋅(xin)(xin)(xin)(xin)(xin)層是不能(neng)形成(cheng)鋅(xin)(xin)(xin)(xin)(xin)花的，熱鍍鋅(xin)(xin)(xin)(xin)(xin)層則有(you)鋅(xin)(xin)(xin)(xin)(xin)花，其形成(cheng)過程如下(xia)：當鍍鋅(xin)(xin)(xin)(xin)(xin)帶從鋅(xin)(xin)(xin)(xin)(xin)鍋出來后，經(jing)(jing)氣刀(dao)的噴吹，大量鋅(xin)(xin)(xin)(xin)(xin)液被吹回鋅(xin)(xin)(xin)(xin)(xin)鍋，這(zhe)時帶鋼(gang)(gang)(gang)表面(mian)還有(you)純鋅(xin)(xin)(xin)(xin)(xin)層，呈液 態附在(zai)鋼(gang)(gang)(gang)板表面(mian)，在(zai)鋼(gang)(gang)(gang)板表面(mian)形成(cheng)大量結晶核(he)，隨(sui)著鋼(gang)(gang)(gang)板上升冷卻，使結晶核(he)慢慢長成(cheng)鋅(xin)(xin)(xin)(xin)(xin)花。冷卻速度(du)越快鋅(xin)(xin)(xin)(xin)(xin)花越小(xiao)，冷卻速度(du)越慢鋅(xin)(xin)(xin)(xin)(xin)花越大。熱鍍鋅(xin)(xin)(xin)(xin)(xin)帶鋼(gang)(gang)(gang)在(zai)我國市場一直(zhi)是緊缺品(pin)種。從20世紀90年代中期以來，每(mei)年都要從國外(wai)進(jin)口80-100萬t左右。隨(sui)著國內經(jing)(jing)濟(ji)的發(fa)展，尤其是汽車、家電(dian)及建筑業的發(fa)展，對(dui)鍍鋅(xin)(xin)(xin)(xin)(xin)帶鋼(gang)(gang)(gang)的需求量也大大增加。

近期鋼(gang)(gang)價(jia)(jia)延(yan)續低(di)迷，隨著通國(guo)規模的(de)酷暑(shu)和旱季到來，熱鍍鋅卷(juan)(juan)板價(jia)(jia)格商(shang)(shang)場(chang)(chang)逐(zhu)漸進入需(xu)要旺(wang)季，海內鋼(gang)(gang)鐵(tie)商(shang)(shang)場(chang)(chang)或將(jiang)窄幅調整。在(zai)決策層兩手抓制度措(cuo)施落實狀況(kuang)、貨銀本位(wei)度定向(xiang)寬(kuan)松力度加(jia)大的(de)直觀層面(mian)(mian)利好牽(qian)動下，商(shang)(shang)場(chang)(chang)信念逐(zhu)漸趨穩(wen)，短期海內鋼(gang)(gang)價(jia)(jia)無望止跌企穩(wen);另一上(shang)面(mian)(mian)，以后鋼(gang)(gang)價(jia)(jia)殺(sha)跌電能有余，而上(shang)漲(zhang)也仍(reng)然屏障重重。熱鍍鋅卷(juan)(juan)板價(jia)(jia)格價(jia)(jia)錢或將(jiang)長期在(zai)于低(di)位(wei)運行場(chang)(chang)面(mian)(mian)。

鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)按用(yong)(yong)(yong)(yong)(yong)(yong)途又(you)可分為一般(ban)用(yong)(yong)(yong)(yong)(yong)(yong)、屋頂用(yong)(yong)(yong)(yong)(yong)(yong)、建筑外側(ce)板(ban)(ban)用(yong)(yong)(yong)(yong)(yong)(yong)、結構用(yong)(yong)(yong)(yong)(yong)(yong)、瓦(wa)壟板(ban)(ban)用(yong)(yong)(yong)(yong)(yong)(yong)、拉伸用(yong)(yong)(yong)(yong)(yong)(yong)和深沖用(yong)(yong)(yong)(yong)(yong)(yong)等(deng)鍍(du)(du)(du)(du)鋅(xin)(xin)鋼(gang)板(ban)(ban)。熱(re)鍍(du)(du)(du)(du)鋅(xin)(xin)板(ban)(ban)主要應用(yong)(yong)(yong)(yong)(yong)(yong)于建筑外用(yong)(yong)(yong)(yong)(yong)(yong)，建筑內用(yong)(yong)(yong)(yong)(yong)(yong)，民用(yong)(yong)(yong)(yong)(yong)(yong)，門窗，家具(ju)，機(ji)械，電子及家用(yong)(yong)(yong)(yong)(yong)(yong)電器等(deng)領域(yu)。也有機(ji)箱用(yong)(yong)(yong)(yong)(yong)(yong)這(zhe)個，不(bu)過(guo)(guo)熱(re)鍍(du)(du)(du)(du)鋅(xin)(xin)板(ban)(ban)不(bu)放輻射的。空調，冰箱，微波爐及其類(lei)似家電背(bei)面的那個板(ban)(ban)就(jiu)是(shi)熱(re)鍍(du)(du)(du)(du)鋅(xin)(xin)板(ban)(ban)。鍍(du)(du)(du)(du)鋅(xin)(xin)層通過(guo)(guo)鈍化處(chu)理，可減少(shao)潮溫貯運條(tiao)件下產生折銹蝕(白銹) 。但這(zhe)種(zhong)化學處(chu)理的防腐蝕性能是(shi)有限的，而且，妨礙(ai)大多數涂料的附著性。這(zhe)種(zhong)處(chu)理一般(ban)不(bu)用(yong)(yong)(yong)(yong)(yong)(yong)在鋅(xin)(xin)鐵合金鍍(du)(du)(du)(du)層，除光(guang)整表面外，作(zuo)為常規，生產廠(chang)對其他(ta)類(lei)型的鍍(du)(du)(du)(du)鋅(xin)(xin)層均進行鈍化處(chu)理。

熱浸(jin)(jin)(jin)鍍(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)將薄鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)浸(jin)(jin)(jin)入(ru)熔(rong)解(jie)的(de)(de)鋅(xin)(xin)(xin)(xin)槽(cao)中(zhong)，使其表面粘(zhan)附一層(ceng)鋅(xin)(xin)(xin)(xin)的(de)(de)薄鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。目(mu)前(qian)主(zhu)要采用(yong)連續鍍(du)(du)鋅(xin)(xin)(xin)(xin)工(gong)(gong)(gong)藝生產，即(ji)(ji)把(ba)成(cheng)(cheng)(cheng)卷的(de)(de)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)連續浸(jin)(jin)(jin)在(zai)(zai)熔(rong)解(jie)有鋅(xin)(xin)(xin)(xin)的(de)(de)鍍(du)(du)槽(cao)中(zhong)制(zhi)成(cheng)(cheng)(cheng)鍍(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban);合金(jin)化鍍(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。這種(zhong)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)也是用(yong)熱浸(jin)(jin)(jin)法制(zhi)造(zao)，但在(zai)(zai)出槽(cao)后(hou)，立即(ji)(ji)把(ba)它加(jia)熱到500 ℃左右，使其生成(cheng)(cheng)(cheng)鋅(xin)(xin)(xin)(xin)和鐵(tie)的(de)(de)合金(jin)被(bei)膜(mo)。這種(zhong)鍍(du)(du)鋅(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)具(ju)有良好(hao)的(de)(de)涂(tu)料的(de)(de)密著性和焊接(jie)性;電鍍(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。用(yong)電鍍(du)(du)法制(zhi)造(zao)這種(zhong)鍍(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)具(ju)有良好(hao)的(de)(de)加(jia)工(gong)(gong)(gong)性。但鍍(du)(du)層(ceng)較薄，耐腐蝕性不如熱浸(jin)(jin)(jin)法鍍(du)(du)鋅(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban);單(dan)面鍍(du)(du)和雙面差鍍(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。單(dan)面鍍(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)，即(ji)(ji)只在(zai)(zai)一面鍍(du)(du)鋅(xin)(xin)(xin)(xin)的(de)(de)產品。在(zai)(zai)焊接(jie)、涂(tu)裝、防銹(xiu)處理(li)、加(jia)工(gong)(gong)(gong)等方面，具(ju)有比雙面鍍(du)(du)鋅(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)好(hao)的(de)(de)適應性。

樓承板(ban)在(zai)建筑(zhu)當(dang)中已(yi)(yi)(yi)經被廣泛(fan)的(de)(de)使用，對(dui)于(yu)(yu)此種設備(bei)的(de)(de)標準化和工(gong)廠化的(de)(de)程度(du)已(yi)(yi)(yi)經是越來(lai)越高(gao)了(le)，那么它們(men)(men)現(xian)在(zai)已(yi)(yi)(yi)經發展(zhan)成為(wei)了(le)產業(ye)(ye)化的(de)(de)趨勢，那么在(zai)未來(lai)對(dui)于(yu)(yu)桁架樓承板(ban)來(lai)說(shuo)，應該有好(hao)(hao)的(de)(de)市場發展(zhan)前(qian)景，現(xian)在(zai)我們(men)(men)就要來(lai)說(shuo)一(yi)說(shuo)鋼筋桁架樓承板(ban)在(zai)使用過程當(dang)中如何(he)進行防(fang)腐的(de)(de)操作。如今對(dui)于(yu)(yu)我們(men)(men)國家(jia)的(de)(de)建筑(zhu)鋼結構來(lai)說(shuo)，它們(men)(men)的(de)(de)發展(zhan)趨勢是特(te)別好(hao)(hao)的(de)(de)，它們(men)(men)也大大的(de)(de)推動(dong)了(le)我們(men)(men)國家(jia)的(de)(de)冶(ye)金行業(ye)(ye)的(de)(de)發展(zhan)，現(xian)在(zai)對(dui)于(yu)(yu)建筑(zhu)行業(ye)(ye)和冶(ye)金行業(ye)(ye)已(yi)(yi)(yi)經緊(jin)緊(jin)的(de)(de)聯系在(zai)一(yi)起(qi)了(le)。對(dui)于(yu)(yu)未來(lai)我們(men)(men)的(de)(de)鋼筋桁架樓承板(ban)將(jiang)會處于(yu)(yu)一(yi)個新的(de)(de)發展(zhan)時期。

熱鍍鋅鋼管批發鍍鋅鋼板按用途又可分為一般用、屋頂用、建筑外側板用、結構用、瓦壟板用、拉伸用和深沖用等鍍鋅鋼板。安順熱鍍鋅鋼管對于一般防(fang)保(bao)護(hu)用鍍(du)(du)層，可以(yi)采用堿性(xing)鋅酸(suan)鹽鍍(du)(du)鋅彩(cai)色(se)(se)(se)鈍化(hua)工(gong)藝。有(you)時(shi)為了產品的(de)(de)配色(se)(se)(se)需要，也可以(yi)采用藍(lan)白色(se)(se)(se)鈍化(hua)工(gong)藝，比如軍綠色(se)(se)(se)鈍化(hua)、黑(hei)色(se)(se)(se)鈍化(hua)等。為提高(gao)鋼(gang)(gang)管(guan)(guan)的(de)(de)耐腐(fu)蝕(shi)性(xing)能(neng)，對一般鋼(gang)(gang)管(guan)(guan)進行鍍(du)(du)鋅。鍍(du)(du)鋅卷分(fen)熱鍍(du)(du)鋅和電(dian)(dian)鍍(du)(du)鋅兩種，熱鍍(du)(du)鋅鍍(du)(du)鋅層厚，電(dian)(dian)鍍(du)(du)鋅成(cheng)(cheng)本低(di)，表面(mian)不是很光滑。吹氧(yang)焊管(guan)(guan)：用作(zuo)煉鋼(gang)(gang)吹氧(yang)用管(guan)(guan)，一般用小口(kou)徑的(de)(de)焊接鋼(gang)(gang)管(guan)(guan)，規格由3/8-2寸八種。用08、10、15、20或者195-Q235的(de)(de)鋼(gang)(gang)帶(dai)制(zhi)作(zuo)成(cheng)(cheng)的(de)(de)，為了防(fang)腐(fu)蝕(shi)，有(you)得(de)進行滲鋁處理。鍍(du)(du)鋅其防(fang)護(hu)作(zuo)用更(geng)強(qiang)，抗腐(fu)蝕(shi)能(neng)力強(qiang)。整個結構由鋅，形(xing)成(cheng)(cheng)致密(mi)的(de)(de)四元結晶體，此結晶體在鋼(gang)(gang)板上形(xing)成(cheng)(cheng)一層屏障(zhang)， 因(yin)而有(you)效的(de)(de)防(fang)止腐(fu)蝕(shi)因(yin)子穿(chuan)透。 耐腐(fu)蝕(shi)性(xing)來自鋅的(de)(de)障(zhang)礙層保(bao)護(hu)功能(neng)強(qiang)。