Effect of Heterogeneous Lamellar Structure on Mechanical Properties and Electrochemical Corrosion Behavior of Al-Zn-Mg-Cu Alloy Subjected to High-Pressure Torsion

2020 ◽  
Vol 29 (7) ◽  
pp. 4457-4462
Author(s):  
Kemin Xue ◽  
Biao Huang ◽  
Siliang Yan ◽  
Guangshan Wu ◽  
Ping Li
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Corrosion Behavior ◽  
Lamellar Structure ◽  
High Pressure Torsion ◽  
Electrochemical Corrosion ◽  
Cu Alloy ◽  
Electrochemical Corrosion Behavior

Mechanical and Corrosion Behaviors of the Casting Al-Cu Alloy Modified by Nano-Scale PrxOy and LaxOy

2015 ◽  
Vol 1120-1121 ◽  
pp. 1053-1058
Author(s):  
Hai Long Zhao ◽  
Wen Zhang ◽  
Chun Lin Zhang ◽  
Da Qian Sun ◽  
Xu Wang
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Fracture Strain ◽  
Electrochemical Corrosion ◽  
Nano Scale ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Electrochemical Corrosion Behavior ◽  
Corrosion Behaviors ◽  
Mechanical Properties And Corrosion

The mechanical properties and corrosion behaviors of the casting Al-Cu alloys were investigated. The proportion of the two modifiers (PrxOy and LaxOy) has effects on the mechanical properties and the electrochemical corrosion behavior of the casting Al-Cu alloy. The ultimate true tensile strength of the Al-Cu alloy modified only by LaxOy is the highest (616.0 MPa). The fracture strain of the Al-Cu alloy modified by PrxOy and LaxOy is the highest (12.3%). The Al-Cu alloy modified by PrxOy has better corrosion resistance than any other Al-Cu alloy. The prominent mechanical properties should be attributed to the finer crystal grains and more homogeneously distributed nano-scale phase precipitates. The existence of continuous and compact protective Al2O3 and RE-O films enhanced the corrosion resistance of the modified Al-Cu alloy during the corrosion process.

Research on Corrosion Behavior of Copper in Reactor Thermal Hydraulic Test

2017 ◽  
Author(s):  
Haiyan Xu ◽  
Donghua Lu ◽  
Xiaohang Wu ◽  
Qianhua Su
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Corrosion Behavior ◽  
Electrochemical Corrosion ◽  
Severe Accident ◽  
Test Facility ◽  
Hydraulic Test ◽  
State Tests ◽  
Component Design ◽  
Electrochemical Corrosion Behavior

Safety instrument test facility (FITY) is one of the high temperature and high pressure test facilities in CGN. It is designed to conduct tests on thermal-hydraulic of safety system and instruments under the similar condition of reactor severe accident. FITY uses lot of copper components to realize sealing and insulation of vessel. Varies of hot state tests revealed that copper components worked well during the test, however, electrochemical corrosion was found as well, making water quality get worse. This article introduces chemical composition, physical properties and electrochemical corrosion behavior of copper component used in FITY, then analyzes the cause of corrosion and summarizes the notice for electronic component design under high temperature and high pressure conditions.

Microstructure, Mechanical Properties and Corrosion Behavior of Mg-1Zn-0.5Ca Alloy

2011 ◽  
Vol 311-313 ◽  
pp. 1735-1740
Author(s):  
Xue Song Li ◽  
Li Dong Wang ◽  
Jian Wu Zhao ◽  
Jian Sheng Liu ◽  
Li Min Wang
Keyword(s):  
Mechanical Properties ◽  
Corrosion Behavior ◽  
Cast Alloy ◽  
Electrochemical Corrosion ◽  
Aging Treatment ◽  
Average Grain Size ◽  
Electrochemical Corrosion Behavior ◽  
Electrochemical Corrosion Resistance ◽  
Mechanical Properties And Corrosion ◽  
Precipitated Phases

Mg-1Zn-0.5Ca alloy was prepared by casting technology. The as-cast alloy was solution treated at 470°C for 24 h and aged at 175°C for 0-50 h. The microstructure, mechanical properties and electrochemical corrosion behavior of the alloys were investigated. The results showed that the average grain size of the as-cast alloy was 120-150 μm, and the precipitated phases were distributed uniformly in α-Mg grain. The as-cast alloy showed good mechanical properties. The tensile strength was 186 MPa, and ductility was 23%. A typical age softening responses was obtained during the aging treatment. In the electrochemical corrosion tests, corrosion of the alloys is improved in Hank’s solution and 3.5wt% NaCl solution after the solution and aged treatment. However, the aged treated alloys showed the better electrochemical corrosion resistance.

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