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AZ91D表面的交流微弧氧化快速成膜
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國(guó)家自然科學(xué)基金(50974010)；北京自然科學(xué)基金(2102039)


Quick Forming of Coating on AZ91D in AC Micro-Arc Oxidation Surface Treatment
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    摘要:

    采用交流微弧氧化處理技術(shù)，在氟化鉀+氫氧化鉀處理液中，對(duì)AZ91D鎂合金進(jìn)行了表面處理研究。建立了膜層厚度與處理參數(shù)之間的關(guān)系模型，確定膜層的組織構(gòu)成，討論膜層生長(zhǎng)機(jī)理，優(yōu)化快速成膜技術(shù)參數(shù)。結(jié)果表明：在氟化鉀濃度為979 g/L、氫氧化鉀濃度為349 g/L、調(diào)壓器輸出電壓為81 V、處理液溫度為32 ℃的條件下，對(duì)工件處理88 s，就可形成30 μm厚的由氟化鎂和氧化鎂構(gòu)成的致密表面膜層，該成膜速度較其它處理技術(shù)的成膜速度至少提高了7倍

    Abstract:

    The surface treatment of AZ91D magnesium alloy was carried out in KF+KOH treatment solution using the AC micro-arc oxidation treatment technique. The relationship between coating thickness and treatment parameters was established, the structure of the coating was determined, the growth mechanism of coating was discussed and the treatment parameters for quick forming of coating was optimized. The results show that under the conditions of 979 g/L for concentration of KF, 349 g/L for concentration of KOH, 81 V for voltage and 32 ℃ for the temperature of treatment solution, a 30 μm-thick compact coating which is mainly made up of MgF2 and MgO can be formed on AZ91D magnesium alloy surface after 88 s. This forming speed of the coating is 7 times quicker than that of other treatment techniques at least

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杜云慧,張 鵬,王玉潔,郝志強(qiáng). AZ91D表面的交流微弧氧化快速成膜[J].稀有金屬材料與工程,2013,42(11):2410~2415.[Du Yunhui, Zhang Peng, Wang Yujie, Hao Zhiqiang. Quick Forming of Coating on AZ91D in AC Micro-Arc Oxidation Surface Treatment[J]. Rare Metal Materials and Engineering,2013,42(11):2410~2415.]
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  • 收稿日期:2012-11-20
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