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外電阻對(duì)純鈦微弧氧化膜特性的影響
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Effect of Additional Resistance on Characteristics of Microarc Oxidation Coatings of Pure Titanium
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    摘要:

    在Na2SiO3-Na3PO4溶液中，研究了恒定電壓下通電回路中有、無外電阻對(duì)純鈦微弧氧化膜特性的影響。結(jié)果表明，MAO膜的生長(zhǎng)特性、相組成、表面形貌和處理后樣品的耐腐蝕能力受MAO過程中外電阻的影響較大。無外電阻時(shí)制備的氧化膜相組成和表面形貌與處理電壓U密切相關(guān)，當(dāng)U<450 V時(shí)，氧化膜由銳鈦礦相TiO2組成，當(dāng)U≥450 V時(shí)，氧化膜由銳鈦礦相和金紅石相TiO2組成。而有外電阻時(shí)制備的氧化膜相組成和表面形貌與U的關(guān)系不大, 膜層由銳鈦礦相TiO2組成，膜表面的微孔尺寸更小、其分布也更均勻；在30%硫酸溶液中的耐腐蝕測(cè)試表明，有外電阻時(shí)制備的樣品比無外電阻時(shí)制備的樣品其耐腐蝕性能平均高出40%

    Abstract:

    The effects of the additional resistance in a circuit under constant voltage on characteristics of microarc oxidation (MAO) coatings of pure titanium substrates in Na2SiO3-Na3PO4 solution were studied. The results show that the coatings’ growth characteristics, phase component, surface morphology and the samples’ corrosion resistance after treatment are strongly influenced by the additional resistance in the MAO process. The phase component and surface morphology of the coatings prepared without the resistance are closely relative to the treating voltages; when the voltage is lower than 450 V, the coatings consist of anatase phase; when the voltage is greater than or equal to 450 V, the coatings consist of anatase and rutile phases. While the phase component and surface morphology of the coatings prepared with the resistance have little relation with the treating voltage; the coatings only consist of anatase phase, and the micropore size is smaller whose distribution is more uniform. The corrosion resistance test in sulfuric acid solution (30%) shows that the corrosion resistance of the samples prepared with the resistance is 40% higher than that prepared without the resistance averagely

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陳根余,吳漢華,唐元廣,常 鴻,徐銘澤.外電阻對(duì)純鈦微弧氧化膜特性的影響[J].稀有金屬材料與工程,2010,39(8):1488~1491.[Chen Genyu, Wu Hanhua, Tang Yuanguang, Chang Hong, Xu Mingze. Effect of Additional Resistance on Characteristics of Microarc Oxidation Coatings of Pure Titanium[J]. Rare Metal Materials and Engineering,2010,39(8):1488~1491.]
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  • 收稿日期:2009-08-26
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