Synergistic improvement of erosion-corrosion resistance and mechanical properties of nickel aluminium bronze alloy by the addition of Cr  

作　　者：Wan-Yu Wang Wen-Jing Zhang Guo-Jie Huang Xu-Jun Mi 

机构地区：[1]State Key Laboratory of Nonferrous Metals and Processes,China GRINM Group Co.,Ltd.,Beijing,100088,China [2]GRIMAT Engineering Institute Co.,Ltd.,Beijing,101407,China [3]General Research Institute for Nonferrous Metals,Beijing,100088,China [4]China Nonferrous Metals Innovation Institute(Tianjin)Co.,Ltd.,Tianjin,300393,China [5]School of Materials Science and Engineering,South China University of Technology,Guangzhou,510640,China

出　　处：《Rare Metals》2025年第1期623-638,共16页稀有金属(英文版)

基　　金：supported by Beijing Nova Program(No.20230484371);the National Key Research and Development Program of China(No.2021YFB3700700).

摘　　要：The effect of Cr addition on nickel aluminium bronze(NAB)alloy microstructure,mechanical properties,and erosion-corrosion behaviour has been studied.The results show that Cr addition does not change the composition of the precipitated phases,more Cr entered theκphase and a small amount of Cr solubilized in the matrix,which increase the hardness of theκand matrix and decrease the potential difference between theκand matrix.NAB alloy with Cr shows high erosion-corrosion resistance at high flow rate conditions,due to its lower phase potential difference and higher surface hardness.At the flow rate of 3 m·s^(-1),the corrosion rate is 0.076 mm·year^(-1),which is~20%lower than that of the unadded Cr sample.Moreover,the corrosion product film contains Cr_(2)O_(3)and Cr^(3+),which improves the densification of the film and raises alloy’s corrosion resistance with Cr addition.The combination of mechanical and corrosion resistant properties may qualify this alloy as a potential candidate material for sustainable and safe equipment.

关 键 词：Nickel aluminium bronze Cr addition Microstructure Erosion-corrosion behaviour Mechanical properties 

分 类 号：TG1[金属学及工艺—金属学]