| 环保型植酸缓蚀剂用于烧结NdFeB材料工序间防锈的研究 |
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| 引用本文： | 南海洋,刘慧丛,李卫平,朱立群,张健,杜凡.环保型植酸缓蚀剂用于烧结NdFeB材料工序间防锈的研究[J].表面技术,2017,46(4):7-11. |
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| 作者姓名： | 南海洋 刘慧丛 李卫平 朱立群 张健 杜凡 |
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| 作者单位： | 北京航空航天大学,北京,100191;京磁材料科技股份有限公司,北京,101300 |
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| 基金项目： | 国家自然科学基金资助项目（U1637204） |
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| 摘 要： | 目的研究烧结NdFeB材料在工序间的腐蚀行为以及植酸的防锈作用和机制。方法通过SEM、EDS、XRD和XPS测试了试样的表面形貌、元素成分、相成分和元素结合能状态。结果NdFeB的晶间富钕相在工序间发生严重腐蚀,造成主相晶粒脱落,不利于镀层结合力。结论植酸有效地抑制了工序间的腐蚀,其作用机制主要是植酸分子在NdFeB表面的吸附。钕、磷、氧等元素的结合能变化也表明这种吸附包括化学吸附的作用。
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| 关 键 词： | 植酸 缓蚀剂 NdFeB 腐蚀防护 吸附 富钕相 |
| 收稿时间： | 2016/12/29 0:00:00 |
| 修稿时间： | 2017/4/20 0:00:00 |
Environmental Friendly Phytic Acid Inhibiter Used in Sintered NdFeB to Prevent Corrosion |
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| NAN Hai-yang,LIU Hui-cong,LI Wei-ping,ZHU Li-qun,ZHANG Jian and DU Fan.Environmental Friendly Phytic Acid Inhibiter Used in Sintered NdFeB to Prevent Corrosion[J].Surface Technology,2017,46(4):7-11. |
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| Authors: | NAN Hai-yang LIU Hui-cong LI Wei-ping ZHU Li-qun ZHANG Jian and DU Fan |
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| Affiliation: | Beihang University, Beijing 100191, China,Beihang University, Beijing 100191, China,Beihang University, Beijing 100191, China,Beihang University, Beijing 100191, China,Jingci Material Science Co., Ltd, Beijing 101300, China and Jingci Material Science Co., Ltd, Beijing 101300, China |
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| Abstract: | The work aims to study corrosion behaviors of sintered NdFeB in interprocess as well as rust inhibition and mechanism of phytic acid. Surface morphology, elements composition, phase composition and element bonding energy state were tested with SEM, EDS, XRD and XPS, respectively. NdFeB was subject to serious corrosion in intergranular Nd-rich phase and thereby principal phase grain fell off, which was harmful to the coating adhesion. Phytic acid can efficiently inhibit the interprocess corrosion by adsorption by adsorption of phytic acid on the surface of NdFeB. The change of bonding energy in Nd, P and O elements also shows the effects of adsorption including chemical adsorption. |
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| Keywords: | phytic acid inhibitor NdFeB corrosion protection adsorption Nd rich phase |
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