鋁(lv)合金陽極氧化膜膜厚不均勻的原因

在實際生(sheng)產過(guo)程中(zhong)(zhong)，有些原因會(hui)導致(zhi)氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)膜(mo)(mo)(mo)(mo)膜(mo)(mo)(mo)(mo)厚(hou)(hou)(hou)的不(bu)(bu)均勻(yun)，例如(ru)夾具與(yu)型材(cai)接(jie)觸不(bu)(bu)良，接(jie)觸面積過(guo)小，麗(li)水陽極(ji)氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)廠(chang)家，會(hui)使(shi)(shi)(shi)得氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)膜(mo)(mo)(mo)(mo)不(bu)(bu)完(wan)整或無氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)膜(mo)(mo)(mo)(mo)。另外硫酸濃(nong)度(du)大范(fan)圍變動會(hui)使(shi)(shi)(shi)得不(bu)(bu)同槽料的氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)膜(mo)(mo)(mo)(mo)膜(mo)(mo)(mo)(mo)厚(hou)(hou)(hou)不(bu)(bu)一樣 ，硫酸濃(nong)度(du)大范(fan)圍改變會(hui)使(shi)(shi)(shi)得計算氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)膜(mo)(mo)(mo)(mo)厚(hou)(hou)(hou)度(du)的經驗公式(shi)（δ=kIt）中(zhong)(zhong)的k不(bu)(bu)準確，因此得到的氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)膜(mo)(mo)(mo)(mo)膜(mo)(mo)(mo)(mo)厚(hou)(hou)(hou)也就(jiu)(jiu)不(bu)(bu)一致(zhi)。在生(sheng)產中(zhong)(zhong)只(zhi)要將上(shang)述問題一一解決，就(jiu)(jiu)能保證氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)膜(mo)(mo)(mo)(mo)膜(mo)(mo)(mo)(mo)厚(hou)(hou)(hou)均勻(yun)。

陽極氧化的幾大奇招

金屬(shu)暴露在空(kong)氣(qi)(qi)里很(hen)容易被(bei)氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)而(er)導(dao)致腐(fu)蝕金屬(shu)，降低器材使用壽命(ming)。我們其實(shi)可(ke)以用方法保(bao)護(hu)好，鋁合金陽(yang)極氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)廠家，在外面涂上一層保(bao)護(hu)膜就可(ke)以很(hen)好解決問題，所以陽(yang)極氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)能給(gei)鋼材上保(bao)護(hu)膜，利用金屬(shu)表面在空(kong)氣(qi)(qi)以氧(yang)(yang)(yang)(yang)(yang)(yang)氣(qi)(qi)和氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)劑在附上氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)而(er)形(xing)成一層緊密氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)性(xing)保(bao)護(hu)膜，把氧(yang)(yang)(yang)(yang)(yang)(yang)氣(qi)(qi)隔離外面。在陽(yang)極氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)廠里氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)一般有幾種方法：陽(yang)極氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)法、酸堿氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)法、熱氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)法和化(hua)學氧(yang)(yang)(yang)(yang)(yang)(yang)化(hua)法等等。

硬質氧化工藝特點

      硬質(zhi)(zhi)(zhi)陽極(ji)氧(yang)化的(de)(de)(de)電(dian)(dian)(dian)(dian)解(jie)液時(shi)在-10℃～+5℃左右的(de)(de)(de)溫(wen)(wen)度(du)(du)下電(dian)(dian)(dian)(dian)解(jie) 。由于硬質(zhi)(zhi)(zhi)陽極(ji)氧(yang)化所生(sheng)成的(de)(de)(de)氧(yang)化膜(mo)(mo)(mo)層具有(you)較高的(de)(de)(de)電(dian)(dian)(dian)(dian)阻，會直(zhi)接(jie)影響到(dao)電(dian)(dian)(dian)(dian)流強度(du)(du)的(de)(de)(de)氧(yang)化作用。為了取得較厚的(de)(de)(de)氧(yang)化膜(mo)(mo)(mo)，勢(shi)必要增加(jia)外(wai)電(dian)(dian)(dian)(dian)壓，硬質(zhi)(zhi)(zhi)陽極(ji)氧(yang)化廠家，其目的(de)(de)(de)是為了消除電(dian)(dian)(dian)(dian)阻大的(de)(de)(de)影響，而使(shi)電(dian)(dian)(dian)(dian)流密度(du)(du)保持一(yi)定，但(dan)電(dian)(dian)(dian)(dian)流較大時(shi)會產(chan)生(sheng)激烈(lie)的(de)(de)(de)發熱(re)現象，加(jia)上(shang)生(sheng)成氧(yang)化膜(mo)(mo)(mo)時(shi)會放出(chu)大量的(de)(de)(de)熱(re)量，使(shi)零件周圍電(dian)(dian)(dian)(dian)解(jie)液溫(wen)(wen)度(du)(du)劇烈(lie)上(shang)升，溫(wen)(wen)度(du)(du)上(shang)升將會加(jia)速氧(yang)化膜(mo)(mo)(mo)的(de)(de)(de)溶解(jie)，使(shi)氧(yang)化膜(mo)(mo)(mo)無法變厚。另外(wai)，發熱(re)現象在膜(mo)(mo)(mo)層與金屬(shu)的(de)(de)(de)接(jie)觸處嚴(yan)重，普(pu)通陽極(ji)氧(yang)化廠家，如不及(ji)時(shi)解(jie)決，加(jia)工零件的(de)(de)(de)局部(bu)表面會因溫(wen)(wen)度(du)(du)上(shang)升而被燒壞。

解決辦法：采用冷(leng)卻設備(bei)和(he)攪拌相結合。冷(leng)卻設備(bei)使電解液強行降溫(wen)(wen)，攪拌是為了使整槽電解液溫(wen)(wen)度均勻，以利(li)于獲得較高質(zhi)量的硬質(zhi)氧(yang)化膜(mo)。