CAJ | 학술논문

将硅烷偶联剂KH-550改性的纳米TiO2颗粒与氟碳乳液混合涂覆于粘结NdFeB磁体表面形成复合防蚀涂层。研究了纳米 TiO2/氟碳复合涂层对粘结 NdFeB 磁体耐腐蚀性能的影响，利用扫描电镜、接触角测定仪和电化学工作站对涂层表面形貌、疏水性和耐腐蚀性进行了表征。结果表明，经过硅烷偶联剂 KH-550改性的纳米TiO2颗粒在涂层中的分散性较好，可以有效减少涂层中的微裂纹和孔洞。粘结NdFeB磁体表面为亲水性，而涂刷纳米TiO2/氟碳复合涂层后，磁体表面转变为疏水性。电化学测试表明复合疏水涂层可以有效提高磁体的耐腐蚀性能。
장규완우련제KH-550개성적납미TiO2과립여불탄유액혼합도복우점결NdFeB자체표면형성복합방식도층。연구료납미 TiO2/불탄복합도층대점결 NdFeB 자체내부식성능적영향，이용소묘전경、접촉각측정의화전화학공작참대도층표면형모、소수성화내부식성진행료표정。결과표명，경과규완우련제 KH-550개성적납미TiO2과립재도층중적분산성교호，가이유효감소도층중적미렬문화공동。점결NdFeB자체표면위친수성，이도쇄납미TiO2/불탄복합도층후，자체표면전변위소수성。전화학측시표명복합소수도층가이유효제고자체적내부식성능。
The fluorocarbon emulsion mixed with KH550-modified TiO2 nanoparticles was coated on the surface of bonded NdFeB magnet to become anti-corrosion composite coating. The effects of nano-TiO2/fluorocarbon composite coating on the corrosion resistance of bonded NdFeB magnet were studied. The surface morphology, hydrophobicity and corrosion resistance of coating were investigated by scanning electron microscope, contact angle meter and electrochemical workstation, respectively. It is shown that the KH550-modified TiO2 nanoparticles disperse well in the coating, and significantly reduce the micro-cracks and holes in the coating. The surface of bonded NdFeB magnet changes from hydrophilicity to hydrophobicity after brushing nano-TiO2/fluorocarbon composite coating. The electrochemistry analysis shows that the composite coatings can effectively enhance the corrosion resistance of bonded NdFeB magnet.