( 1.湖南大學(xué)化學(xué)化工學(xué)院， 長沙 410082；
2. 湖南大學(xué) 材料科學(xué)與工程學(xué)院， 長沙 410082)
摘 要: 以NH4H2PO4、 NaF和NaOH組成基礎(chǔ)電解液， 采用有機胺作為抑弧劑，對AZ91D鎂合金高壓陽極氧化過程進行了研究。結(jié)果表明： 有機胺對鎂合金的陽極氧化有著顯著的抑弧效應(yīng)， 可使鎂合金的陽極火花放電電壓提高50~80V。 在抑制陽極發(fā)生弧光放電的狀態(tài)下， 鎂合金表面可以沉積一層致密、 具有較高硬度和優(yōu)良耐蝕性能的氧化膜層。分析了有機胺對氧化膜層性能和表面形貌的影響以及不同有機胺在鎂合金陽極氧化過程中的抑弧能力， 并初步探討了有機胺在鎂合金陽極氧化過程中的抑弧機理。
關(guān)鍵字: 鎂合金； 有機胺； 陽極氧化； 抑弧效應(yīng)
CHEN Jin-hua1, KUANG Ya-fei1
（ 1. College of Chemistry and Chemical Engineering,
Hunan University,Changsha 410082, China;
2. College of Materials Science and Engineering,
Hunan University,Changsha 410082, China）
Abstract: The anodizing behavior of AZ91D magnesium alloys in base electrolyte containing NH4H2PO4, NaF and NaOH at high voltage was investigated by using organic amine as additive of restraining sparking. The results show that the organic amines have remarkable effect on anodizing of magnesium alloys. Under restraining sparking, a compact oxidation film, which has high hardness and good corrosion resistance, can be deposited on the surface of magnesium alloys. The effects of organic amines on properties and morphologies of oxidation film, and on abilities of restraining sparking were studied in detail. Moreover, the mechanism of restraining sparking of organic amine about anodizing of magnesium alloys was discussed.
Key words: magnesium alloys; organic amine; anodizing; effect of restraining sparking
