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鍍(du)鋅(xin)鋼(gang)管(guan)分熱(re)鍍(du)鋅(xin)和電(dian)(dian)鍍(du)鋅(xin)兩種(zhong),熱(re)鍍(du)鋅(xin)鍍(du)鋅(xin)層厚,具有鍍(du)層均勻,附著力強,使(shi)用壽命長(chang)等優點。電(dian)(dian)鍍(du)鋅(xin)成本低,表(biao)面不是(shi)很光滑,其本身的(de)耐腐(fu)蝕性(xing)比(bi)熱(re)鍍(du)鋅(xin)管(guan)相差(cha)很多。 鍍鋅管工藝(yi)特點 1.對硫(liu)酸鹽鍍鋅(xin)的優(you)化硫(liu)(liu)酸鹽(yan)(yan)鍍(du)(du)(du)鋅(xin)(xin)(xin)最大優(you)(you)點是(shi)電(dian)(dian)流(liu)效(xiao)率(lv)(lv)高達100% ,沉(chen)積(ji)速(su)(su)率(lv)(lv)快,這是(shi)其(qi)他鍍(du)(du)(du)鋅(xin)(xin)(xin)工(gong)藝無可(ke)比擬的。由(you)于(yu)鍍(du)(du)(du)層(ceng)(ceng)結晶(jing)(jing)不(bu)夠細致(zhi),分(fen)散能(neng)(neng)力與深鍍(du)(du)(du)能(neng)(neng)力較差(cha),因而只適于(yu)幾何形(xing)狀簡單的管材(cai)與線(xian)材(cai)等電(dian)(dian)鍍(du)(du)(du)。硫(liu)(liu)酸鹽(yan)(yan)電(dian)(dian)鍍(du)(du)(du)鋅(xin)(xin)(xin)鐵合金工(gong)藝對傳(chuan)統的硫(liu)(liu)酸鹽(yan)(yan)鍍(du)(du)(du)鋅(xin)(xin)(xin)工(gong)藝進行(xing)優(you)(you)化(hua),只保(bao)留了主鹽(yan)(yan)硫(liu)(liu)酸鋅(xin)(xin)(xin),其(qi)余組(zu)分(fen)均舍(she)棄。在組(zu)成新(xin)工(gong)藝配(pei)方中又加(jia)入適量鐵鹽(yan)(yan),使原來的單金屬(shu)鍍(du)(du)(du)層(ceng)(ceng)形(xing)成鋅(xin)(xin)(xin)鐵合金鍍(du)(du)(du)層(ceng)(ceng)。工(gong)藝的重(zhong)組(zu),不(bu)僅發揚了原工(gong)藝電(dian)(dian)流(liu)效(xiao)率(lv)(lv)高、沉(chen)積(ji)速(su)(su)率(lv)(lv)快的優(you)(you)點,還使分(fen)散能(neng)(neng)力與深鍍(du)(du)(du)能(neng)(neng)力得到很大改善,過去(qu)復雜件(jian)不(bu)能(neng)(neng)鍍(du)(du)(du),現在簡單與復雜件(jian)都(dou)能(neng)(neng)鍍(du)(du)(du),而且防護性能(neng)(neng)比單金屬(shu)提高3~5倍。生(sheng)產實踐證(zheng)明(ming),用于(yu)線(xian)材(cai)、管材(cai)的連續電(dian)(dian)鍍(du)(du)(du),鍍(du)(du)(du)層(ceng)(ceng)晶(jing)(jing)粒比原來的更細化(hua)、更光亮,沉(chen)積(ji)速(su)(su)率(lv)(lv)快。2~3 min內(nei)鍍(du)(du)(du)層(ceng)(ceng)厚度(du)達到要(yao)求。 2.硫酸(suan)鹽(yan)鍍鋅(xin)的轉化硫(liu)(liu)酸(suan)鹽(yan)電鍍鋅鐵合金只保留硫(liu)(liu)酸(suan)鹽(yan)鍍鋅的主鹽(yan)硫(liu)(liu)酸(suan)鋅,其余組分如硫(liu)(liu)酸(suan)鋁、明礬(硫(liu)(liu)酸(suan)鋁鉀(jia)(jia))等可在鍍液處(chu)理時(shi),加(jia)(jia)入氫(qing)氧(yang)(yang)化(hua)鈉(na)使(shi)之生成不溶性氫(qing)氧(yang)(yang)化(hua)物沉淀去(qu)(qu)除;對(dui)有機添加(jia)(jia)劑(ji),則加(jia)(jia)入粉狀活性炭吸(xi)咐(fu)去(qu)(qu)除。試驗表明,硫(liu)(liu)酸(suan)鋁與硫(liu)(liu)酸(suan)鋁鉀(jia)(jia)一(yi)次性難(nan)以徹底去(qu)(qu)除,對(dui)鍍層(ceng)光亮度有影響,但(dan)并不嚴重,可隨帶出(chu)消(xiao)耗,此(ci)時(shi)鍍層(ceng)光亮度便可恢(hui)復 溶液通(tong)過處(chu)理,可按新工藝(yi)所需(xu)成分含(han)量補加(jia)(jia),即完(wan)成轉化(hua)。 3.沉積速率(lv)快(kuai)、防護(hu)性能(neng)優異(yi) 硫酸鹽(yan)電(dian)鍍(du)鋅鐵合金工藝電(dian)流(liu)效率高達(da)100% ,沉積速率快是任(ren)何鍍(du)鋅工藝無(wu)可比擬的,精細(xi)管的運(yun)行速度(du)8~12 m/min,鍍(du)層厚(hou)度(du)平均2m/min,這是連續(xu)鍍(du)鋅難于達(da)到(dao)的。鍍(du)層光(guang)亮細(xi)致悅目。按國家標準(zhun)GB/T10125“人(ren)造氣氛試(shi)驗(yan)-鹽(yan)霧試(shi)驗(yan)”方法測(ce)試(shi),72 h,鍍(du)層完好、無(wu)變化;96 h,鍍(du)層表面出(chu)現(xian)少量白銹。 4.獨(du)特的清潔生(sheng)產鍍鋅管采用硫酸(suan)鹽電鍍鋅鐵合金工(gong)藝(yi),在于生產(chan)線槽(cao)(cao)與槽(cao)(cao)間均穿(chuan)孔直通而溶(rong)液(ye)(ye)無任(ren)何帶(dai)出(chu)或(huo)溢(yi)流(liu)。生產(chan)過程各(ge)工(gong)序(xu)由循(xun)(xun)環系(xi)統組成,各(ge)槽(cao)(cao)溶(rong)液(ye)(ye)即(ji)酸(suan)堿液(ye)(ye)、電鍍液(ye)(ye)、出(chu)光與鈍化液(ye)(ye)等,只循(xun)(xun)環回(hui)用不向系(xi)統外滲漏或(huo)排放,生產(chan)線只設(she)5個(ge)清(qing)洗槽(cao)(cao),采用循(xun)(xun)環回(hui)用定期排放,特別是鈍化后不清(qing)洗的(de)無廢水產(chan)生的(de)生產(chan)工(gong)藝(yi)。 5.電鍍設備的特殊性鍍(du)(du)(du)(du)(du)鋅(xin)管(guan)的電(dian)(dian)鍍(du)(du)(du)(du)(du)同(tong)線材電(dian)(dian)鍍(du)(du)(du)(du)(du)一樣(yang)(yang),都屬于連續電(dian)(dian)鍍(du)(du)(du)(du)(du),但施鍍(du)(du)(du)(du)(du)的設(she)備(bei)不同(tong)。鐵(tie)絲以其細長的條形特色(se)而(er)設(she)計的鍍(du)(du)(du)(du)(du)槽(cao)(cao)(cao),槽(cao)(cao)(cao)體長而(er)寬卻淺(qian)。電(dian)(dian)鍍(du)(du)(du)(du)(du)時鐵(tie)絲從孔眼穿出(chu),呈(cheng)一字形在液(ye)(ye)面展開,保持相互(hu)間距。而(er)鍍(du)(du)(du)(du)(du)鋅(xin)管(guan)卻又不同(tong)于鐵(tie)絲,有(you)其獨特之(zhi)處,槽(cao)(cao)(cao)設(she)備(bei)較(jiao)為復雜(za)。槽(cao)(cao)(cao)體由上、下(xia)(xia)兩部(bu)(bu)分組(zu)成(cheng),上部(bu)(bu)為鍍(du)(du)(du)(du)(du)槽(cao)(cao)(cao),下(xia)(xia)部(bu)(bu)為溶液(ye)(ye)循環儲存槽(cao)(cao)(cao),形成(cheng)一個上窄(zhai)下(xia)(xia)寬狀、似梯形的槽(cao)(cao)(cao)體,在鍍(du)(du)(du)(du)(du)槽(cao)(cao)(cao)中(zhong)設(she)有(you)鍍(du)(du)(du)(du)(du)鋅(xin)管(guan)電(dian)(dian)鍍(du)(du)(du)(du)(du)運行(xing)的通道,槽(cao)(cao)(cao)底有(you)兩個通孔與下(xia)(xia)部(bu)(bu)的儲存槽(cao)(cao)(cao)相通,并與液(ye)(ye)下(xia)(xia)泵形成(cheng)鍍(du)(du)(du)(du)(du)液(ye)(ye)循環復用系統。因此,鍍(du)(du)(du)(du)(du)鋅(xin)管(guan)同(tong)鐵(tie)絲電(dian)(dian)鍍(du)(du)(du)(du)(du)一樣(yang)(yang),鍍(du)(du)(du)(du)(du)件都是動(dong)態(tai)性的,而(er)與鐵(tie)絲電(dian)(dian)鍍(du)(du)(du)(du)(du)不同(tong)之(zhi)處,電(dian)(dian)鍍(du)(du)(du)(du)(du)鍍(du)(du)(du)(du)(du)鋅(xin)管(guan)的鍍(du)(du)(du)(du)(du)液(ye)(ye)也是動(dong)態(tai)性的。 |
鍍鋅鋼管分熱鍍鋅和電鍍鋅兩種,熱鍍鋅鍍鋅層厚,具有鍍層均勻,附著力強,使用壽命長等優點。電鍍鋅成本低,表面不是很光滑,其本身的耐腐蝕性比熱鍍鋅管相差很多。