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鍍鋅(xin)(xin)(xin)鋼管(guan)分熱(re)(re)鍍鋅(xin)(xin)(xin)和(he)電鍍鋅(xin)(xin)(xin)兩種,熱(re)(re)鍍鋅(xin)(xin)(xin)鍍鋅(xin)(xin)(xin)層厚,具(ju)有鍍層均勻,附著力強,使(shi)用壽命(ming)長(chang)等(deng)優點。電鍍鋅(xin)(xin)(xin)成本低,表面不是很光滑(hua),其本身的耐腐蝕(shi)性(xing)比熱(re)(re)鍍鋅(xin)(xin)(xin)管(guan)相差很多。 鍍(du)鋅管工藝特點(dian) 1.對硫酸鹽鍍鋅的優化硫(liu)酸鹽(yan)鍍(du)(du)(du)(du)鋅(xin)最大(da)(da)優(you)點(dian)是(shi)電流(liu)效率高達100% ,沉(chen)積速率快,這是(shi)其他鍍(du)(du)(du)(du)鋅(xin)工(gong)(gong)藝(yi)無可比(bi)(bi)擬(ni)的(de)(de)。由于鍍(du)(du)(du)(du)層結晶不(bu)夠細致,分散(san)能力(li)(li)與深鍍(du)(du)(du)(du)能力(li)(li)較(jiao)差,因而只適(shi)于幾(ji)何形(xing)(xing)狀簡(jian)單(dan)的(de)(de)管材(cai)(cai)與線材(cai)(cai)等電鍍(du)(du)(du)(du)。硫(liu)酸鹽(yan)電鍍(du)(du)(du)(du)鋅(xin)鐵合金工(gong)(gong)藝(yi)對傳(chuan)統的(de)(de)硫(liu)酸鹽(yan)鍍(du)(du)(du)(du)鋅(xin)工(gong)(gong)藝(yi)進行優(you)化,只保留了主鹽(yan)硫(liu)酸鋅(xin),其余組分均舍棄。在(zai)組成(cheng)新工(gong)(gong)藝(yi)配方中(zhong)又加入適(shi)量(liang)鐵鹽(yan),使原來的(de)(de)單(dan)金屬鍍(du)(du)(du)(du)層形(xing)(xing)成(cheng)鋅(xin)鐵合金鍍(du)(du)(du)(du)層。工(gong)(gong)藝(yi)的(de)(de)重組,不(bu)僅發揚了原工(gong)(gong)藝(yi)電流(liu)效率高、沉(chen)積速率快的(de)(de)優(you)點(dian),還(huan)使分散(san)能力(li)(li)與深鍍(du)(du)(du)(du)能力(li)(li)得到很大(da)(da)改善(shan),過去(qu)復雜(za)件不(bu)能鍍(du)(du)(du)(du),現在(zai)簡(jian)單(dan)與復雜(za)件都能鍍(du)(du)(du)(du),而且防(fang)護性能比(bi)(bi)單(dan)金屬提高3~5倍。生產(chan)實踐證(zheng)明,用于線材(cai)(cai)、管材(cai)(cai)的(de)(de)連續(xu)電鍍(du)(du)(du)(du),鍍(du)(du)(du)(du)層晶粒比(bi)(bi)原來的(de)(de)更細化、更光亮(liang),沉(chen)積速率快。2~3 min內(nei)鍍(du)(du)(du)(du)層厚度達到要求。 2.硫(liu)酸(suan)鹽鍍鋅的轉化硫(liu)酸(suan)(suan)鹽電鍍(du)鋅鐵合(he)金(jin)只保留硫(liu)酸(suan)(suan)鹽鍍(du)鋅的主鹽硫(liu)酸(suan)(suan)鋅,其余組(zu)分如硫(liu)酸(suan)(suan)鋁、明礬(硫(liu)酸(suan)(suan)鋁鉀)等(deng)可(ke)(ke)在鍍(du)液處(chu)理時,加入氫氧(yang)化(hua)(hua)鈉使(shi)之(zhi)生成不(bu)溶性(xing)(xing)氫氧(yang)化(hua)(hua)物(wu)沉(chen)淀去除;對有機添加劑,則(ze)加入粉(fen)狀活性(xing)(xing)炭(tan)吸(xi)咐去除。試驗表明,硫(liu)酸(suan)(suan)鋁與硫(liu)酸(suan)(suan)鋁鉀一次性(xing)(xing)難(nan)以(yi)徹底去除,對鍍(du)層光亮度有影響,但并不(bu)嚴(yan)重,可(ke)(ke)隨帶出消耗,此時鍍(du)層光亮度便可(ke)(ke)恢(hui)復 溶液通過處(chu)理,可(ke)(ke)按新工(gong)藝所(suo)需成分含量補加,即完成轉(zhuan)化(hua)(hua)。 3.沉積速(su)率快、防(fang)護性(xing)能優異 硫酸鹽電(dian)(dian)鍍(du)(du)鋅鐵合(he)金工藝電(dian)(dian)流效率(lv)高達(da)100% ,沉積速(su)率(lv)快是(shi)任何(he)鍍(du)(du)鋅工藝無(wu)可比擬的(de),精(jing)細管的(de)運(yun)行速(su)度8~12 m/min,鍍(du)(du)層(ceng)(ceng)厚度平(ping)均(jun)2m/min,這是(shi)連續鍍(du)(du)鋅難于達(da)到(dao)的(de)。鍍(du)(du)層(ceng)(ceng)光(guang)亮細致悅(yue)目。按國家(jia)標準GB/T10125“人造(zao)氣氛試驗-鹽霧試驗”方(fang)法測試,72 h,鍍(du)(du)層(ceng)(ceng)完好、無(wu)變化;96 h,鍍(du)(du)層(ceng)(ceng)表面出現少量白銹。 4.獨(du)特的清潔生產鍍鋅管(guan)采用(yong)(yong)(yong)硫酸(suan)鹽(yan)電鍍鋅鐵合金工(gong)藝(yi),在于生產(chan)線槽(cao)與槽(cao)間均穿孔直通而(er)溶(rong)液(ye)(ye)(ye)無(wu)任(ren)何帶出或溢流。生產(chan)過程各工(gong)序由(you)循環(huan)(huan)系統組成,各槽(cao)溶(rong)液(ye)(ye)(ye)即酸(suan)堿(jian)液(ye)(ye)(ye)、電鍍液(ye)(ye)(ye)、出光與鈍化液(ye)(ye)(ye)等,只循環(huan)(huan)回(hui)用(yong)(yong)(yong)不(bu)向(xiang)系統外滲漏或排放,生產(chan)線只設5個(ge)清(qing)洗(xi)槽(cao),采用(yong)(yong)(yong)循環(huan)(huan)回(hui)用(yong)(yong)(yong)定期排放,特(te)別是鈍化后(hou)不(bu)清(qing)洗(xi)的無(wu)廢水(shui)產(chan)生的生產(chan)工(gong)藝(yi)。 5.電鍍設(she)備的特殊性鍍(du)(du)(du)(du)(du)鋅管(guan)的(de)(de)電(dian)(dian)鍍(du)(du)(du)(du)(du)同(tong)線材電(dian)(dian)鍍(du)(du)(du)(du)(du)一樣,都(dou)屬于連續(xu)電(dian)(dian)鍍(du)(du)(du)(du)(du),但施鍍(du)(du)(du)(du)(du)的(de)(de)設備(bei)(bei)不(bu)同(tong)。鐵(tie)(tie)絲(si)以其細長(chang)的(de)(de)條形(xing)(xing)(xing)特色而設計的(de)(de)鍍(du)(du)(du)(du)(du)槽(cao)(cao),槽(cao)(cao)體(ti)長(chang)而寬卻淺。電(dian)(dian)鍍(du)(du)(du)(du)(du)時鐵(tie)(tie)絲(si)從孔眼穿出(chu),呈一字(zi)形(xing)(xing)(xing)在液(ye)面展開(kai),保(bao)持相(xiang)互間距。而鍍(du)(du)(du)(du)(du)鋅管(guan)卻又(you)不(bu)同(tong)于鐵(tie)(tie)絲(si),有(you)其獨特之處(chu),槽(cao)(cao)設備(bei)(bei)較為(wei)復(fu)雜。槽(cao)(cao)體(ti)由上、下(xia)兩部(bu)分組成(cheng),上部(bu)為(wei)鍍(du)(du)(du)(du)(du)槽(cao)(cao),下(xia)部(bu)為(wei)溶(rong)液(ye)循(xun)環儲(chu)存槽(cao)(cao),形(xing)(xing)(xing)成(cheng)一個上窄下(xia)寬狀、似梯形(xing)(xing)(xing)的(de)(de)槽(cao)(cao)體(ti),在鍍(du)(du)(du)(du)(du)槽(cao)(cao)中設有(you)鍍(du)(du)(du)(du)(du)鋅管(guan)電(dian)(dian)鍍(du)(du)(du)(du)(du)運行的(de)(de)通(tong)(tong)道,槽(cao)(cao)底(di)有(you)兩個通(tong)(tong)孔與(yu)下(xia)部(bu)的(de)(de)儲(chu)存槽(cao)(cao)相(xiang)通(tong)(tong),并(bing)與(yu)液(ye)下(xia)泵形(xing)(xing)(xing)成(cheng)鍍(du)(du)(du)(du)(du)液(ye)循(xun)環復(fu)用系統。因此,鍍(du)(du)(du)(du)(du)鋅管(guan)同(tong)鐵(tie)(tie)絲(si)電(dian)(dian)鍍(du)(du)(du)(du)(du)一樣,鍍(du)(du)(du)(du)(du)件都(dou)是(shi)動(dong)態(tai)性的(de)(de),而與(yu)鐵(tie)(tie)絲(si)電(dian)(dian)鍍(du)(du)(du)(du)(du)不(bu)同(tong)之處(chu),電(dian)(dian)鍍(du)(du)(du)(du)(du)鍍(du)(du)(du)(du)(du)鋅管(guan)的(de)(de)鍍(du)(du)(du)(du)(du)液(ye)也(ye)是(shi)動(dong)態(tai)性的(de)(de)。 |
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。