微弧(hu)氧化（Micro-arc Oxidation，MAO）處理將鋁、鎂合(he)(he)金(jin)(jin)制(zhi)品(pin)做(zuo)陽極(ji)，不(bu)銹鋼做(zuo)陰極(ji)，置于脈沖電(dian)場環(huan)境的電(dian)解液中，輕金(jin)(jin)屬微弧(hu)氧化生(sheng)產(chan)(chan)線，使制(zhi)品(pin)表面(mian)產(chan)(chan)生(sheng)微弧(hu)放(fang)電(dian)（圖1）而生(sheng)成一層與基體以冶金(jin)(jin)方(fang)式結(jie)合(he)(he)的氧化鋁或氧化鎂陶瓷層。這是一種環(huan)保型鎂合(he)(he)金(jin)(jin)表面(mian)處理工藝并解決表面(mian)防腐(fu)難題(ti)。

鎂(mei)合金(jin)微(wei)(wei)弧氧(yang)化(hua)、鋁合金(jin)微(wei)(wei)弧氧(yang)化(hua)、鈦合金(jin)微(wei)(wei)弧氧(yang)化(hua)、微(wei)(wei)弧氧(yang)化(hua)生產線(xian)、微(wei)(wei)弧氧(yang)化(hua)電源

微(wei)弧(hu)氧(yang)化電解液不含有(you)毒物質和重(zhong)(zhong)金屬(shu)元素(su)，電解液（環保(bao)型）抗污染能力強和再生重(zhong)(zhong)復使用(yong)率高，因而對環境污染小，滿足環保(bao)、清潔(jie)生產(chan)(chan)的需要(yao)；微(wei)弧(hu)氧(yang)化表(biao)面的陶瓷(ci)層比(bi)較致(zhi)密，孔(kong)隙率極低，具有(you)很高的耐腐蝕(shi)性能，鹽霧腐蝕(shi)性能提高5-10倍，綜合解決(jue)了實際應用(yong)的困擾問題，為鎂合金開發應用(yong)提供了技術(shu)保(bao)障，對“十五”國(guo)家科(ke)技攻(gong)關計劃具有(you)重(zhong)(zhong)大意(yi)義，鎂合金微(wei)弧(hu)氧(yang)化生產(chan)(chan)線，其社(she)會效益和經濟效益將十分顯著。

微弧氧化封孔處理

由于微弧(hu)氧化陶(tao)瓷層(ceng)(ceng)(ceng)(ceng)(ceng)表面(mian)分布著(zhu)大量的(de)(de)微孔(kong)(kong)(kong)放電(dian)通(tong)道，腐蝕(shi)(shi)(shi)(shi)介質能通(tong)過孔(kong)(kong)(kong)隙浸(jin)入(ru)(ru)鎂(mei)合金(jin)(jin)基(ji)體(ti)產(chan)生腐蝕(shi)(shi)(shi)(shi)，在微弧(hu)氧化后對鎂(mei)合金(jin)(jin)表面(mian)進(jin)行(xing)封(feng)孔(kong)(kong)(kong)處(chu)理，在孔(kong)(kong)(kong)隙的(de)(de)吸(xi)附(fu)作用下，封(feng)孔(kong)(kong)(kong)劑循著(zhu)這些微孔(kong)(kong)(kong)或裂紋進(jin)入(ru)(ru)并填充，微弧(hu)氧化生產(chan)線，降低氧化膜的(de)(de)孔(kong)(kong)(kong)隙率，使(shi)外層(ceng)(ceng)(ceng)(ceng)(ceng)疏松層(ceng)(ceng)(ceng)(ceng)(ceng)逐漸變得致密(mi)，膜層(ceng)(ceng)(ceng)(ceng)(ceng)與基(ji)體(ti)結合良(liang)好，復合膜層(ceng)(ceng)(ceng)(ceng)(ceng)具有(you)更加(jia)致密(mi)和均勻的(de)(de)微結構，腐蝕(shi)(shi)(shi)(shi)電(dian)位(wei)正移，腐蝕(shi)(shi)(shi)(shi)電(dian)流密(mi)度(du)降低，腐蝕(shi)(shi)(shi)(shi)電(dian)阻增(zeng)大，進(jin)一步提升了MAO陶(tao)瓷層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)耐蝕(shi)(shi)(shi)(shi)耐磨能力，同時可以增(zeng)加(jia)膜層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)色澤(ze)，改善膜層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)美觀性，或為(wei)其他膜層(ceng)(ceng)(ceng)(ceng)(ceng)和結構材料(liao)的(de)(de)制(zhi)備(bei)提供優(you)良(liang)的(de)(de)襯底(di)。