航空科学技术2024，Vol.35Issue(10)：43-51,9.DOI:10.19452/j.issn1007-5453.2024.10.005
一种火箭橇试验滑轨防护高熵合金的电化学特性和耐蚀性
Electrochemical Properties and Corrosion Resistance of a High Entropy Alloy for Protection of Rocket Sled Track
摘要
Abstract
The safety and reliability of the rocket sled test is seriously threatened by the corrosion of the rocket sled rail.In order to improve corrosion resistance of rocket sled track,an Innovative AlZnPbSn high entropy alloy was prepared and its microstructure was characterized.The corrosion resistance of AlZnPbSn high-entropy alloy in NaCl solution with different concentrations was tested by electrochemical method and immersion method.The corrosion morphology and corrosion products were analyzed by means of SEM,EDS and XRD,and the effect of NaCl solution concentration on the corrosion resistance of AlZnPbSn high-entropy alloy was studied.The results show that the microstructure of AlZnPbSn alloy is dendritic,eutectic and eutectic,and the composition phases of AlZnPbSn alloy are all simple solid solutions.The dendrite structure is mainly composed of Al solid solution and Zn solid solution,in which the Zn solid solution is mainly in the dendrite and the Al solid solution is mainly in the interdendrite.The eutectic structure mainly consists of Sn solid solution and Pb solid solution.The eutectic structure is mainly composed of Zn solid solution and Sn solid solution.AlZnPbSn high-entropy alloy is uniformly corroded in NaCl solutions of different concentrations,and the corrosion surface is loose and not dense.The corrosion products attached to the alloy surface are mainly oxides of Al and Zn.After corrosion,Sn and Pb dissolve or fall off,forming micro-holes or pores on the corrosion surface.In 10.5％and 14％NaCl solutions,a locally dense corrosion product film was formed on the surface of AlZnPbSn high entropy alloy,but the film was cracked and could not protect the matrix.Therefore,the dense corrosion film could not improve the corrosion resistance.With the increase of NaCl solution concentration,the corrosion rate of AlZnPbSn high-entropy alloy increases,the oxides of Al in the corrosion products increase,and the porosity formed by the corrosion products increases.关键词
AlZnPbSn高熵合金/NaCl溶液/微观组织结构/电化学特性/耐蚀性Key words
AlZnPbSn HEA/NaCl solution/microstructure/electrochemical properties/corrosion resistance分类
矿业与冶金引用本文复制引用
王玮华,姚小飞,戚晓玲,王梓靖..一种火箭橇试验滑轨防护高熵合金的电化学特性和耐蚀性[J].航空科学技术,2024,35(10):43-51,9.基金项目
航空科学基金(202000290U1001) （202000290U1001）
陕西省自然科学基础研究计划项目(2024JC-YBMS-410) Aeronautical Science Foundation of China(202000290U1001) （2024JC-YBMS-410）
Natural Science Basic Research Program of Shaanxi Province(2024JC-YBMS-410) （2024JC-YBMS-410）
