摘要
采用电弧熔炼结合真空甩带制备了Ni_(50)Nb_(14)Ta_(14)P_(9)Fe_(13)非晶条带。通过X射线衍射(XRD)、扫描电镜(SEM)和差示扫描量热分析法(DSC)分析了该合金的微观结构和热稳定性,并通过动电位极化和浸泡试验研究了合金在32wt%HCl溶液中的耐蚀性。结果表明:该合金具有典型的非晶态结构和较好的热稳定性。与哈氏合金C276和304不锈钢相比,在25℃的32wt%HCl溶液中,该合金耐蚀性显著提高,具有稳定的钝化特征且钝化区间ΔE更宽,其自腐蚀电流密度约为C276的33.3%,约为304的0.6%;其维钝电流密度相对于C276和304降低了约1个数量级。C276和304的电化学腐蚀在总腐蚀中的占比分别为10.3%和33.5%。在80℃的32wt%HCl溶液中,该合金未发生腐蚀失重,腐蚀速率远低于C276和304。
Ni_(50)Nb_(14)Ta_(14)P_(9)Fe_(13) amorphous ribbons were prepared by arc melting combined with vacuum ribbon spinning.The microstructure and thermal stability of the alloys were analysed by X-ray diffraction(XRD),scanning electron microscopy(SEM)and differential scanning calorimetry(DSC),and the corrosion resistance of the alloys in 32wt%HCl solution was investigated by kinetic potential polarisation and immersion experiments.The results show that the alloy has a typical amorphous structure and good thermal stability.Compared with that of Hastelloy C276 and 304 stainless steel,the corrosion resistance of the alloy in 32wt%HCl solution at 25℃ is significantly improved,with stable passivation characteristics and a wider passivation interval ΔE.The self-corrosion current density is about 33.3% of that of C276 and 0.6% of that of 304,and the dimensional passivation current density is reduced by about one order of magnitude with respect to that of C276 and 304,and the electrochemical corrosion of C276 and 304 account for 10.3% and 33.5% of the total corrosion,respectively.In 32wt%HCl solution at 80℃,the alloy does not undergo corrosion weight loss,and the corrosion rate is much lower than that of C276 and 304.
作者
高亮
苏铭滨
何波
贺勇
倪黎
周亮
张新富
刘伟
陈吉
GAO Liang;SU Mingbin;HE Bo;HE Yong;NI Li;ZHOU Liang;ZHANG Xinfu;LIU Wei;CHEN Ji(China Petrochemical Catalyst Co.,Ltd.,Beijing 100029,China;Changling County Branch,China Petrochemical Catalyst Co.,Ltd.,Yueyang 414012,China;Faculty of Mechanical Engineering,Liaoning Petrochemical University,Fushun 113001,China;Faculty of Civil Engineering,Liaoning Petrochemical University,Fushun 113001,China)
出处
《热加工工艺》
北大核心
2025年第20期42-46,56,共6页
Hot Working Technology
基金
中国石化催化剂有限公司课题(SCC-B-2022-032,SCC-B-2023-037)。
关键词
镍基非晶条带
钝化
化学腐蚀
电化学腐蚀
耐蚀性
nickel-based amorphous ribbon
passivation
chemical corrosion
electrochemical corrosion
corrosion resistance
