李亚丽,李建三,谢婉晨.磷化时间与温度对镁合金磷化膜的影响[J].表面技术,2016,45(7):150-155.
LI Ya-li,LI Jian-san,XIE Wan-chen.The Influence of Phosphating Temperature and Time on the Structure and Property of Phosphating Film on Magnesium Alloys[J].Surface Technology,2016,45(7):150-155 |
| 磷化时间与温度对镁合金磷化膜的影响 |
| The Influence of Phosphating Temperature and Time on the Structure and Property of Phosphating Film on Magnesium Alloys |
| 投稿时间：2016-04-22 修订日期：2016-07-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.07.025 |
| 中文关键词: 钙系磷化 镁合金 磷化温度 磷化时间 膜结构 耐蚀性 |
| 英文关键词:calcium phosphating magnesium alloy phosphating temperature phosphating time film structure corrosion resistance |
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| 中文摘要: |
| 目的 研究钙系磷化液的磷化温度及时间对磷化膜结构与性能的影响。 方法 通过控制单因素变量，在不同磷化温度和时间条件下在镁合金表面制备磷化膜。通过扫描电镜（SEM）、 X 射线衍射仪（XRD）以及极化曲线测试等方法对 AZ31 镁合金表面磷化膜的形貌、结构与性能进行分析。 结果 镁合金表面钙系磷化膜呈花瓣状结晶生长，其主要成分为 CaHPO4·2H2O。随着磷化时间的增加，磷化膜的厚度不断增加，但磷化时间过长使得磷化膜的平整度有所下降。极化曲线测试分析表明，磷化时间为 30 min 时，腐蚀电位与极化电阻最大，腐蚀电流密度最小，此时磷化膜耐蚀性最佳。当磷化温度为 30 ℃时，磷化膜致密性最好，磷化膜的结晶度及覆盖能力在磷化温度为 30 ℃时达到最佳。 极化曲线测试结果显示， 磷化温度为 30 ℃时的磷化膜极化电阻最大，腐蚀电流密度最小，耐蚀性最优。 结论磷化时间为 30 min、温度为 30 ℃时所得磷化膜的质量最好， 耐蚀性最佳。 |
| 英文摘要: |
| Objective To study the influence of calcium phosphating temperature and time on the structure and property of phosphating film on magnesium alloys. Methods By controlling the single factor variables, the magnesium alloys were phosphated under the condition of different phosphating temperature and time. The morphology, structure and properties of phosphating film were analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD) and polarization curve test respectively. Results SEM showed that the crystal shape of the phosphating film looked like petals, whose main composition was CaHPO4·2H2O. The phosphating film became thick with the phosphating time increasing, but its flatness became bad. The polarization curve test showed when phosphating time was 30 minutes, the corrosion potential and polarization resistance of the phosphating film were maximum, the corrosion current density was minimum, and the corrosion resistance was the best. The result of SEM showed the density of phosphating film was the best at 30 ℃ phosphating temperature. The XRD result showed that the crystallinity and coverage of phosphating film were the best at 30 ℃. What’s more, its polarization resistance was maximum, the corrosion current density was minimum, the phosphating film had the best corrosion resistance. Conclusion The quality and corrosion resistance of phosphating films become the best at 30 ℃ when the phosphating time is 30 min. |
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