1. 西安交通大学第一附属医院 a. 肝胆外科；b. 精准外科与再生医学国家地方联合工程研究中心，陕西 西安 710061；
2. 西安交通大学 a. 启德书院；b. 宗濂书院，陕西 西安 710061
In Vitro Study on Corrosion Resistance of Different Surface Modified
TIAN Boyan1a,1b, LIU Hao1a,1b,2a, FU Shan1a,1b,2a, MA Sijie1a,1b,2a, ZHANG Yanchao1b,2a, QIU Minglong1a,1b,2a， DENG Bo1b,2b,LEI Lei1b,2a, YE Dan1b,2a, GAO Huimin1b,2a, LI Yixing1b,2a, LV Yi1a,1b, YAN Xiaopeng1a,1b
1. a. Department of Hepatobiliary Surgery; b. National Local Joint Engineering Research Center for Precision Surgery &
Regenerative Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an Shaanxi 710061, China;
2. a. Qide College; b. Zonglian College, Xi’an Jiaotong University, Xi’an Shaanxi 710061, China
Abstract：Objective To compare the ability of different surface modified NdFeB magnets to resist gastric juice corrosion. Methods
The gastric juice of clinical patients was collected, and the magnets were immersed at 38℃ in vitro. The weight of magnets was
periodically weighed and the soaking solution was replaced to measure the iron ion concentration of the soaking solution. After 30
days of immersion, the weight loss rate of each group of magnets was calculated, and the surface structure of magnets was observed
by scanning electron microscopy. Results After 30 days of gastric juice soaking, the weight loss rates of magnets of bare magnet,
nickel plating, nickel-titanium nitride composite coating and epoxy resin coated were 2.74%, 0.67%, 0.26%, and 0.08%, respectively.
The concentration of iron in the soaking solution was different in each time points. The results of electron microscopy showed that
different degree of corrosion spots appeared on the surface of each group of magnets after immersion. Conclusion The corrosion
resistance of NdFeB magnets after surface modification of epoxy resin coating is significantly better than that of pure nickel coating
and nickel-titanium nitride composite coating.
田波彦1a,1b，刘豪 1a,1b,2a ，付珊1a,1b,2a，马思捷1a,1b,2a，张砚超1b,2a，邱明龙1a,1b,2a，邓博1b,2b，雷蕾1b,2a，叶丹1b,2a，高慧敏1b,2a，李益行1b,2a，吕毅1a,1b，严小鹏1a,1b. 不同表面改性钕铁硼磁体抗胃液腐蚀的体外研究[J]. 中国医疗设备, 2019, 34(3): 5-8.
TIAN Boyan1a,1b, LIU Hao1a,1b,2a, FU Shan1a,1b,2a, MA Sijie1a,1b,2a, ZHANG Yanchao1b,2a, QIU Minglong1a,1b,2a， DENG Bo1b,2b,LEI Lei1b,2a, YE Dan1b,2a, GAO Huimin1b,2a, LI Yixing1b,2a, LV Yi1a,1b, YAN Xiaopeng1a,1b. In Vitro Study on Corrosion Resistance of Different Surface Modified. China Medical Devices, 2019, 34(3): 5-8.
