Effect of the Cu Content on the Microstructure and Corrosion Behavior of PEO Coatings on Al–xCu Alloys

2018 ◽  
Vol 165 (9) ◽  
pp. C469-C483 ◽  
Author(s):  
Liye Zhu ◽  
Wei Zhang ◽  
Tao Zhang ◽  
Ji Qiu ◽  
Jingyi Cao ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Cu Content ◽  
Peo Coatings

scholarly journals STUDIES ON TENSILE PROPERTIES AT VARIOUS STRAIN RATES AND CORROSION BEHAVIOR OF PEAKAGED AL-6SI-0.5MG (-0.5CU) ALLOYS

2016 ◽  
Vol 17 (2) ◽  
pp. 105-115
Author(s):  
Abul Hossain ◽  
Fahmida Gulshan ◽  
A. S. W. Kurny
Keyword(s):  
Tensile Properties ◽  
Corrosion Behavior ◽  
Open Circuit Potential ◽  
Corrosion Potential ◽  
Electrochemical Corrosion ◽  
Open Circuit ◽  
Strain Rates ◽  
Cu Content ◽  
Electrochemical Corrosion Behavior ◽  
Experimental Strain

This paper focuses the effect of Cu additions on tensile properties of Al-6Si-0.5Mg alloy at various strain rates and electrochemical corrosion behavior. The additions of Cu resulted in an increase in tensile strength and showed higher strength all over the experimental strain rates. Evaluations of tensile properties at the three different strain rates (10-4, 10-3 & 10-2s-1) showed that they affected the tensile properties significantly. The strength was better at higher strain rate but ductility was poor. Eelectrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation have been used to evaluate the corrosion resistance of Cu free and 0.5wt% Cu content Al-6Si-0.5Mg alloy in 0.1M NaCl solution. The 0.5wt% Cu addition to the Al-6Si-0.5Mg alloy showed that Cu decreased susceptibility to corrosion compared to the Cu free Al-6Si-0.5Mg alloy. The magnitude of open circuit potential (OCP), corrosion potential (Ecorr) and pitting corrosion potential (Epit) of Al-6Si-0.5Mg alloy were shifted to the more noble direction due to 0.5wt% Cu addition and thermal modification.

Effects of chemical composition on the corrosion behavior of A7N01S-T5 Al alloys

2015 ◽  
Vol 29 (10n11) ◽  
pp. 1540025 ◽  
Author(s):  
Xiaomin Wang ◽  
Xiaoyao Liao ◽  
Chuanping Ma ◽  
Shufang Zhang ◽  
Yan Liu ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Corrosion Behavior ◽  
Corrosion Current ◽  
Al Alloys ◽  
Chemical Compositions ◽  
Al Alloy ◽  
Electrochemical Test ◽  
Electrochemical Behaviors ◽  
Cu Content ◽  
Corrosion Pits

Corrosion behavior of 7N01 Al alloy is sensitive to chemical composition. In this paper, stress corrosion cracking (SCC) and electrochemical behaviors of A7N01S-T5 Al alloys with three different chemical compositions were investigated. The corrosion weight loss and corrosion pits depth statistics showed that Alloy #3 (4.53 wt .% Zn , 1.27% Mg , < 0.001% Cu , 0.24% Cr , 0.15% Zr ) possesses the best anti-SCC property, while Alloy #1 (4.54% Zn , 1.09% Mg , 0.102% Cu , 0.25% Cr , 0.15% Zr ) was the weakest one. The different SCC susceptibility was mainly related to the Cu content as Alloy #3 contains higher Cu than Alloys #1 and #2. Electrochemical test result showed that Alloy #3 has higher corrosion potential and lower corrosion current density than Alloys #1 and #2. It is believed that a trace Cu can significantly improve the SC resistance of Al alloy, mainly because that Cu element can reduce the potential difference between grain inside and grain boundaries.

scholarly journals Investigation of the Microstructure, Hardness and Corrosion Resistance of a New 58Ag24Pd11Cu2Au2Zn1.5In1.5Sn Dental Alloy

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4199 ◽  
Author(s):  
Dan Gheorghe ◽  
Ion Pencea ◽  
Iulian Vasile Antoniac ◽  
Ramona-Nicoleta Turcu
Keyword(s):  
Solid Solution ◽  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Artificial Saliva ◽  
Complex Structure ◽  
Electrochemical Corrosion ◽  
Dental Alloy ◽  
Dental Alloys ◽  
Cu Content ◽  
Electrochemical Corrosion Behavior

Higher-noble dental alloys (Au, Ag, and Pd) are the most desirable for dentistry applications, but they are expensive. Low-noble (Ag, Pd, Cu) dental alloys are alternatives to higher-noble ones due to their lower price. In this regard, the paper supports the price lowering of dental alloy by increasing the Cu content, i.e., a new 58Ag24Pd11Cu2Au2Zn1.5In1.5Sn dental alloy. The increasing addition of the Cu leads to a complex structure consisting of a solid solution that engulfs compounds of micrometric and nanometric sizes. The 58Ag24Pd11Cu2Au2Zn1.5In1.5Sn has demonstrated a much better electrochemical corrosion behavior in artificial saliva compared to the Paliag and Unique White dental alloys. The improved corrosion behavior of the new alloy is supported by the diminishing of the Cu selective diffusion into the electrolyte due to its retaining into compounds and into Ag-Pd solid solution. Also, the synergic effects of Cu, Zn, In, Sn may improve the corrosion resistance, but they have strengthened the 58Ag24Pd11Cu2Au2Zn1.5In1.5Sn matrix. The main finding addressed in the paper consists in a new 58Ag24Pd11Cu2Au2Zn1.5In1.5Sn dental alloy with improved corrosion resistance in artificial saliva.

scholarly journals Corrosion behavior of MoS2-incorporated PEO coatings prepared on Al alloy

2020 ◽  
Vol 8 (5) ◽  
pp. 252-262 ◽  
Author(s):  
Babak Ghorbanian ◽  
Mohammad Tajally ◽  
Seyed Mohammad Mousavi Khoie ◽  
Hossein Tavakoli
Keyword(s):  
Corrosion Behavior ◽  
Al Alloy ◽  
Peo Coatings
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