化學清(qing)洗(xi)(xi)化學清(qing)洗(xi)(xi)，質(zhi)量穩定，適(shi)用(yong)(yong)于清(qing)理焊絲及尺寸(cun)不(bu)大、成批生產(chan)的工件。可用(yong)(yong)浸洗(xi)(xi)法和擦洗(xi)(xi)法兩(liang)種(zhong)。可用(yong)(yong)煤油等相關的溶(rong)劑(ji)表面去油，用(yong)(yong)40℃～70℃的5%～10%NaOH溶(rong)液堿洗(xi)(xi)3 min～7 min(純鋁時間(jian)稍(shao)長但不(bu)超過20 min)，流動(dong)清(qing)水沖洗(xi)(xi)，接著用(yong)(yong)室溫至60℃的30%HNO3溶(rong)液酸洗(xi)(xi)1 min～3 min，凈化鋁材廠家批發報價，流動(dong)清(qing)水沖洗(xi)(xi)，風干或低溫干燥(zao)。

陽(yang)極(ji)氧(yang)(yang)化(hua)(hua)對(dui)電(dian)解著(zhu)色的(de)(de)(de)色差有(you)很(hen)重要(yao)(yao)的(de)(de)(de)影響，尤(you)其是在立式(shi)氧(yang)(yang)化(hua)(hua)線生(sheng)產(chan)過程中(zhong)(zhong)很(hen)容易(yi)出現兩頭色，立式(shi)氧(yang)(yang)化(hua)(hua)槽深7.5m，上(shang)下槽液(ye)容易(yi)產(chan)生(sheng)溫(wen)差，溫(wen)度對(dui)陽(yang)極(ji)氧(yang)(yang)化(hua)(hua)有(you)重要(yao)(yao)的(de)(de)(de)影響，溫(wen)度高，氧(yang)(yang)化(hua)(hua)槽液(ye)對(dui)氧(yang)(yang)化(hua)(hua)膜的(de)(de)(de)溶(rong)解加(jia)劇，多孔(kong)(kong)(kong)型(xing)陽(yang)極(ji)氧(yang)(yang)化(hua)(hua)膜表面(mian)的(de)(de)(de)孔(kong)(kong)(kong)徑會加(jia)大，反之，多孔(kong)(kong)(kong)型(xing)陽(yang)極(ji)氧(yang)(yang)化(hua)(hua)膜表面(mian)的(de)(de)(de)孔(kong)(kong)(kong)徑較(jiao)小。另(ling)外(wai)，溫(wen)度高，陽(yang)極(ji)氧(yang)(yang)化(hua)(hua)膜的(de)(de)(de)孔(kong)(kong)(kong)隙率較(jiao)高，反之較(jiao)低(di)。電(dian)解著(zhu)色主要(yao)(yao)是使著(zhu)色液(ye)的(de)(de)(de)金(jin)屬離(li)子在氧(yang)(yang)化(hua)(hua)膜的(de)(de)(de)微(wei)孔(kong)(kong)(kong)內(nei)的(de)(de)(de)阻擋層的(de)(de)(de)表面(mian)上(shang)進行電(dian)化(hua)(hua)學(xue)還原(yuan)反應，使得著(zhu)色液(ye)中(zhong)(zhong)的(de)(de)(de)金(jin)屬離(li)子沉積在陽(yang)極(ji)氧(yang)(yang)化(hua)(hua)膜孔(kong)(kong)(kong)的(de)(de)(de)底部，對(dui)入射(she)光發(fa)生(sheng)散(san)射(she)而顯現出不同(tong)的(de)(de)(de)顏(yan)色，微(wei)孔(kong)(kong)(kong)中(zhong)(zhong)沉積的(de)(de)(de)物質越多，則(ze)顏(yan)色越深。

焊前的(de)機械(xie)清理(li):在工件尺寸較大(da)、生產周期較長、多層焊或化學(xue)清洗后又(you)沾污時，常采用(yong)(yong)(yong)機械(xie)清理(li)。先用(yong)(yong)(yong)相關溶劑擦試表面(mian)以除油(you)，隨后直(zhi)接用(yong)(yong)(yong)直(zhi)徑為(wei)0.15 mm～0.2 mm的(de)銅絲刷(shua)或不銹(xiu)鋼絲刷(shua)子刷(shua)，刷(shua)到露出金屬光(guang)澤為(wei)止。一般不宜用(yong)(yong)(yong)砂輪或普(pu)通(tong)砂紙打磨，以免砂粒留在金屬表面(mian)，焊接時進(jin)入熔(rong)池產生夾(jia)渣等(deng)缺陷。另外也可(ke)用(yong)(yong)(yong)銼刀(dao)等(deng)清理(li)待焊表面(mian)。