樂山鍍鋁鋅板重慶鍍鋅卷主要有：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。鍍鋁鋅板批發鋅(xin)(xin)層(ceng)脫落的(de)(de)(de)(de)主要(yao)原(yuan)因有(you)：表面氧化(hua)(hua)(hua)、有(you)硅化(hua)(hua)(hua)合(he)物、冷扎(zha)乳化(hua)(hua)(hua)液太臟、NOF段氧化(hua)(hua)(hua)氣(qi)氛及保護氣(qi)體露點太高、空燃比不(bu)合(he)理、氫氣(qi)流量偏(pian)低(di)(di)、爐(lu)(lu)子(zi)有(you)氧滲入，帶(dai)鋼(gang)入鍋溫(wen)度(du)偏(pian)低(di)(di)，RWP段爐(lu)(lu)壓偏(pian)低(di)(di)及爐(lu)(lu)門吸風、NOF段爐(lu)(lu)溫(wen)偏(pian)低(di)(di)，油脂蒸(zheng)發(fa)不(bu)盡、鋅(xin)(xin)鍋鋁(lv)含(han)量偏(pian)低(di)(di)、機組速(su)度(du)太快、還(huan)原(yuan)不(bu)充分、鋅(xin)(xin)液中(zhong)停留時間太短(duan)、鍍(du)(du)層(ceng)偏(pian)厚。白銹和黑(hei)斑產生(sheng)的(de)(de)(de)(de)原(yuan)因有(you)：黑(hei)斑是白銹進一步(bu)氧化(hua)(hua)(hua)形(xing)成的(de)(de)(de)(de)鍍(du)(du)鋅(xin)(xin)板的(de)(de)(de)(de)特點與(yu)用途。鍍(du)(du)鋅(xin)(xin)卷板是以熱(re)軋鋼(gang)帶(dai)或冷軋鋼(gang)帶(dai)為基(ji)板，經過(guo)連續熱(re)浸鍍(du)(du)鋅(xin)(xin)工藝而生(sheng)產出來(lai)的(de)(de)(de)(de)， 產品具有(you)耐(nai)腐(fu)蝕強、 表面質(zhi)量好、有(you)利于(yu)深加工、經濟實用等特點。

熱鍍(du)鋅卷板(ban)(ban)價格行業(ye)統計數(shu)據顯(xian)示，十一(yi)月國內粗(cu)鋼(gang)(gang)(gang)日均產(chan)量(liang)為(wei)兩百零九(jiu)萬噸(dun)，環比下(xia)降3.3%，創出今年(nian)以來水平，但是(shi)當前(qian)減產(chan)受(shou)到季(ji)節性(xing)(xing)因素支撐，市場(chang)對數(shu)據有(you)效性(xing)(xing)提出質疑。鍍(du)鋅卷工業(ye)品而言，近(jin)期陸續(xu)公布的(de)重(zhong)要數(shu)據中性(xing)(xing)偏多。但值(zhi)得注意的(de)是(shi)，同年(nian)十一(yi)月熱鍍(du)鋅卷板(ban)(ban)價格工業(ye)增加(jia)值(zhi)和投資(zi)增速(su)放緩，進(jin)一(yi)步印證了國內總需求(qiu)乏(fa)力(li)，工業(ye)復蘇形勢不(bu)容樂(le)觀。加(jia)上未(wei)來經濟(ji)結(jie)構調整等因素，工業(ye)品價格反彈高度將有(you)限。傳(chuan)統需求(qiu)淡季(ji)效應還在持(chi)續(xu)不(bu)斷地發(fa)酵，冬儲效果不(bu)佳(jia)。雖然數(shu)據顯(xian)示供應壓力(li)開始減輕，但是(shi)目(mu)前(qian)處于鋼(gang)(gang)(gang)鐵(tie)需求(qiu)淡季(ji)，市場(chang)成交萎縮，下(xia)游(you)采購(gou)遲(chi)遲(chi)未(wei)能有(you)效跟進(jin)，市場(chang)信心不(bu)足，鍍(du)鋅鋼(gang)(gang)(gang)板(ban)(ban)貿(mao)易商囤貨現象也不(bu)明顯(xian)。

鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)帶鋼的(de)鋅(xin)(xin)(xin)(xin)層特性(xing) 電(dian)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)層是(shi)不(bu)能形(xing)成(cheng)鋅(xin)(xin)(xin)(xin)花(hua)(hua)的(de)，熱鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)層則有鋅(xin)(xin)(xin)(xin)花(hua)(hua)，其形(xing)成(cheng)過程如(ru)下：當鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)帶從(cong)(cong)鋅(xin)(xin)(xin)(xin)鍋出來后，經氣刀的(de)噴吹，大(da)(da)量鋅(xin)(xin)(xin)(xin)液被吹回(hui)鋅(xin)(xin)(xin)(xin)鍋，這時帶鋼表(biao)面(mian)還有純鋅(xin)(xin)(xin)(xin)層，呈液 態附在鋼板(ban)表(biao)面(mian)，在鋼板(ban)表(biao)面(mian)形(xing)成(cheng)大(da)(da)量結晶(jing)核，隨著鋼板(ban)上升冷卻，使結晶(jing)核慢(man)慢(man)長成(cheng)鋅(xin)(xin)(xin)(xin)花(hua)(hua)。冷卻速度越快(kuai)鋅(xin)(xin)(xin)(xin)花(hua)(hua)越小，冷卻速度越慢(man)鋅(xin)(xin)(xin)(xin)花(hua)(hua)越大(da)(da)。熱鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)帶鋼在我國(guo)市場一直(zhi)是(shi)緊缺品種。從(cong)(cong)20世紀(ji)90年代中期以來，每年都(dou)要從(cong)(cong)國(guo)外(wai)進(jin)口80-100萬t左(zuo)右。隨著國(guo)內經濟的(de)發(fa)展(zhan)，尤其是(shi)汽(qi)車、家電(dian)及建筑業的(de)發(fa)展(zhan)，對鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)帶鋼的(de)需求(qiu)量也(ye)大(da)(da)大(da)(da)增(zeng)加。

熱(re)浸(jin)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)將薄鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)浸(jin)入(ru)熔解的鋅(xin)(xin)(xin)(xin)槽中，使其表面粘附一層鋅(xin)(xin)(xin)(xin)的薄鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。目前主要采用連續鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)工(gong)藝生產，即(ji)把(ba)成卷的鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)連續浸(jin)在(zai)熔解有(you)鋅(xin)(xin)(xin)(xin)的鍍(du)(du)(du)(du)槽中制成鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban);合(he)(he)金化鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。這種鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)也是用熱(re)浸(jin)法(fa)制造(zao)，但(dan)在(zai)出槽后，立即(ji)把(ba)它(ta)加熱(re)到(dao)500 ℃左右，使其生成鋅(xin)(xin)(xin)(xin)和(he)鐵的合(he)(he)金被(bei)膜。這種鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)具(ju)有(you)良好(hao)(hao)的涂(tu)料的密著性(xing)(xing)和(he)焊接性(xing)(xing);電鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。用電鍍(du)(du)(du)(du)法(fa)制造(zao)這種鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)具(ju)有(you)良好(hao)(hao)的加工(gong)性(xing)(xing)。但(dan)鍍(du)(du)(du)(du)層較(jiao)薄，耐腐蝕性(xing)(xing)不(bu)如熱(re)浸(jin)法(fa)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban);單(dan)面鍍(du)(du)(du)(du)和(he)雙(shuang)面差鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。單(dan)面鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)，即(ji)只在(zai)一面鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)的產品(pin)。在(zai)焊接、涂(tu)裝、防銹處理、加工(gong)等方面，具(ju)有(you)比雙(shuang)面鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)好(hao)(hao)的適應性(xing)(xing)。