| 镁铝合金表面锶磷化膜的改性及其腐蚀性能研究 |
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| 引用本文： | 曹京宜,王臣业,徐敏,宋帆,陈蓉蓉,杨萌,王君,刘连河.镁铝合金表面锶磷化膜的改性及其腐蚀性能研究[J].材料导报,2017,31(Z2):282-285. |
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| 作者姓名： | 曹京宜 王臣业 徐敏 宋帆 陈蓉蓉 杨萌 王君 刘连河 |
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| 作者单位： | 91872部队海军涂料分析检测中心,北京 102442,哈尔滨工程大学青岛船舶科技有限公司,青岛 266400,哈尔滨工程大学青岛船舶科技有限公司,青岛 266400,哈尔滨工程大学材料科学与化学工程学院,哈尔滨 150001,哈尔滨工程大学材料科学与化学工程学院,哈尔滨 150001,哈尔滨工程大学材料科学与化学工程学院,哈尔滨 150001,哈尔滨工程大学青岛船舶科技有限公司,青岛 266400,哈尔滨工程大学材料科学与化学工程学院,哈尔滨 150001;青岛海洋新材料科技有限公司,青岛 266100 |
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| 基金项目： | 国家国际科技合作专项项目(2015DFA50050)；青岛市黄岛区海洋科技专项项目(2014-4-6)；黑龙江省应用技术研究与开发计划国家项目省级资助(GX16A008) |
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| 摘 要： | 利用化学沉积法在镁铝合金表面构筑锶磷化膜,以氢氧化钠和硅酸钠为原料配制磷化膜封孔处理液,对镁合金表面锶磷化膜存在的裂纹和孔洞等缺陷进行封孔处理。通过元素分析及扫描电子显微镜发现改性膜层表面具有Sr、P、O以及Si元素,硅酸钠对锶磷化膜具有良好的封孔作用。通过膜层厚度检测,证明封孔后的锶磷化膜厚度没有发生显著变化。封孔后的锶磷化膜极化电阻比封孔前提升了4倍,而腐蚀电流仅为封孔前的1/3,封孔后膜层的耐腐蚀性能显著提升。
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| 关 键 词： | 镁铝合金 锶磷化膜 耐腐蚀 封孔 |
Modification of Strontium Phosphate Film on Magnesium-Aluminum Alloy Surface and Its Corrosion Properties |
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| CAO Jingyi,WANG Chenye,XU Min,SONG Fan,CHEN Rongrong,YANG Meng,WANG Jun and LIU Lianhe.Modification of Strontium Phosphate Film on Magnesium-Aluminum Alloy Surface and Its Corrosion Properties[J].Materials Review,2017,31(Z2):282-285. |
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| Authors: | CAO Jingyi WANG Chenye XU Min SONG Fan CHEN Rongrong YANG Meng WANG Jun and LIU Lianhe |
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| Affiliation: | Naval Coatings Analysis and Testing Centre, Force 91872, Beijing 102442,HEU Qingdao Ship Science and Technology Co., Ltd., Qingdao 266400,HEU Qingdao Ship Science and Technology Co., Ltd., Qingdao 266400,College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001,College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001,College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001,HEU Qingdao Ship Science and Technology Co., Ltd., Qingdao 266400 and College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001;Qingdao Advanced Marine Material Technology Co., Ltd., Qingdao 266100 |
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| Abstract: | The magnesium-aluminum alloy surface was modified with an strontium phosphate film by chemical deposition method. Then, sodium hydroxide and sodium silicate were used to prepare strontium phosphating film sealing treatment solution, which could seal the cracks, holes and other defects of strontium phosphate coating on the surface of the magnesium alloy. The results showed that the films had obvious Si elements with Sr, P and O elements, and the microstructures of the films showed that the sodium silicate had good sealing effect on the strontium phosphating film. The result of film thickness detection showed that there was no obvious change on the thickness of the strontium phosphating film. The electrochemical test showed that the strontium phosphating film had a four-fold increase in the polarization resistance before sealing, while the corrosion current was only one-third of that before the sealing, and the corrosion resistance of the film after sealing was significantly improved. |
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| Keywords: | magnesium-aluminum alloy strontium phosphate coating corrosion resistance sealing |
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