Corrosion behavior of novel Cu-Ni-Al-Si alloy with super-high strength in 3.5% NaCl solution

被引：15
|
作者：
Zhu, Jia-jun [1 ,2 ]
Li, San-hua [3 ]
Shen, Lei-nuo [3 ]
Yang, Wu-lin [1 ,2 ]
Li, Zhou [3 ]
机构：
[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Hunan Prov Key Lab Spray Deposit Technol & Applic, Changsha 410082, Hunan, Peoples R China
[3] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2017年 / 27卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Cu-Ni-Al-Si alloy; Ni2Si precipitate; corrosion behavior; average annual corrosion rate; corrosion product; COPPER-NICKEL-ALLOYS; CU-10NI-3AL-0.8SI ALLOY; EROSION-CORROSION; MICROSTRUCTURE; PROPERTY; SEAWATER; ALUMINUM; WATER;
D O I：
10.1016/S1003-6326(17)60128-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A novel Cu-6.5Ni-1Al-1Si-0.15Mg-0.15Ce alloy with super-high strength was designed and its corrosion behavior in 3.5% NaCl solution at 25 degrees C was investigated by the means of SEM observation, TEM observation and XPS analysis. The alloy after solution treatment, 80% cold rolling and aging at 450 degrees C for 1 h had the best comprehensive properties with hardness of HV 314, electrical conductivity of 19.4% IACS, tensile strength of 1017 MPa, and average annual corrosion rate of 0.028 mm/a. The oxides and chloride products formed at first, followed by the formation of dyroxides products. The alloy showed super-high strength, good electrical conductivity and corrosion resistant because Ni2Si hindered the precipitation of large NiAl at the grain boundary and the denickelefication of the alloy.
引用
收藏
页码：1096 / 1104
页数：9
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