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首页> 外文会议>Asian Pacific Conference on Fracture and Strength;APCFS; 20061122-25;20061122-25; Sanya(CN);Sanya(CN) >Study On the Corrosion Resistance Properties of the Ceramic Coating Obtained Through Microarc Oxidation on the Aluminium Alloy Surface
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Study On the Corrosion Resistance Properties of the Ceramic Coating Obtained Through Microarc Oxidation on the Aluminium Alloy Surface

机译：铝合金表面微弧氧化陶瓷涂层耐蚀性能的研究

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摘要

Oxidation ceramic coating was directly synthesized on LY12 aluminium alloy by micro-arc oxidation (MAO) process in Na_2SiO_3 electrolyte solution with the Na_2WO_4-KOH-Na_2EDTA addition. The corrosion resistance of the coating was tested using CS300P electrochemical corrosion workshop in 3.5% NaCl solution. Using the scanning electron microscopy (SEM) and X-ray diffraction (XRD), the cross-section microstructure, the surface morphology and the phase structure of the micro-arc oxidation ceramic coating were analyzed. The results showed that the corrosion resistance of the micro-arc oxidation ceramic coating in 3.5% NaCl solution was enhanced remarkably, the corrosion velocity was obviously slowed down. The thickness of micro-arc oxidation ceramic coating was about Hum. The final phases in the coating were found to be α-Al_2O_3 and γ-Al_2O_3. The mechanism of the oxidation ceramic coating formation was investigated too.
机译：在Na_2SiO_3电解液中加入Na_2WO_4-KOH-Na_2EDTA，通过微弧氧化（MAO）法直接在LY12铝合金上合成了氧化陶瓷涂层。使用CS300P电化学腐蚀车间在3.5％NaCl溶液中测试了涂层的耐腐蚀性。用扫描电子显微镜（SEM）和X射线衍射（XRD）分析了微弧氧化陶瓷涂层的截面组织，表面形貌和相结构。结果表明，微弧氧化陶瓷涂层在3.5％NaCl溶液中的耐蚀性显着提高，腐蚀速度明显减慢。微弧氧化陶瓷涂层的厚度约为Hum。发现涂层中的最终相为α-Al_2O_3和γ-Al_2O_3。还研究了氧化陶瓷涂层的形成机理。

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