咪唑啉和卟啉对NaCl溶液中的热压孕镶金刚石钻头胎体材料的缓蚀作用  

Corrosion inhibition of imidazoline and porphyrin on hot-pressed impregnateddiamond bits in NaCl solution

作　　者：姚远基 潘秉锁[1] 刘志江 YAO Yuanji;PAN Bingsuo;LIU Zhijiang(Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China)

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074

出　　处：《金刚石与磨料磨具工程》2020年第5期58-63,共6页Diamond & Abrasives Engineering

基　　金：国家自然科学基金项目(41872187)。

摘　　要：采用电化学方法、失重测试和拉曼光谱研究咪唑啉和卟啉在pH为10、质量分数为20%的NaCl溶液中的热压孕镶金刚石钻头胎体材料的缓蚀行为。结果表明:咪唑啉和卟啉均能促进胎体材料表面钝化膜(主要是铜和铁的氧化物)的形成,能够起到缓蚀作用。由于咪唑啉在碱性条件下的水解作用,其在电化学测试中表现出的缓蚀率明显小于卟啉的。为期1周的失重测试表明,长时间的浸泡能够提高咪唑啉的缓蚀率至与卟啉相同的水平。The corrosion inhibition behavior of imidazoline and porphyrin in hot pressing impregnated diamond bit matrix material in NaCl solution with pH10 and mass fraction of 20%was studied by electrochemical method,weight loss test and Raman spectroscopy.The results show that both imidazoline and porphyrin can promote the formation of passivation films(mainly copper and iron oxides)on the surface of matrix materials,which can play a role of corrosion inhibition.Due to the hydrolysis of imidazoline under alkaline conditions,the inhibition efficiency of imidazoline in the electrochemical test is significantly less than that of porphyrin.The one-week weightlessness test shows that prolonged soaking can increase the inhibitory efficiency of imidazoline to the same level as porphyrin.

关 键 词：孕镶金刚石钻头 胎体材料 腐蚀磨损 缓蚀作用 NACL溶液 

分 类 号：TG74[金属学及工艺—刀具与模具]