Laser fabrication of W-reinforced Cu layers: II. Electrical wear behavior in air and synthetic acid rain

2016 ◽  
Vol 177 ◽  
pp. 118-130 ◽  
Author(s):  
P.K. Wong ◽  
C.T. Kwok ◽  
H.C. Man ◽  
D. Guo
Keyword(s):  
Acid Rain ◽  
Wear Behavior ◽  
Laser Fabrication ◽  
Electrical Wear ◽  
Synthetic Acid

scholarly journals Ibuprofen as a corrosion inhibitor for copper in synthetic acid rain solution

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Zaklina Z. Tasić ◽  
Marija B. Petrović Mihajlović ◽  
Ana T. Simonović ◽  
Milan B. Radovanović ◽  
Milan M. Antonijević
Keyword(s):  
Acid Rain ◽  
Corrosion Inhibitor ◽  
Quantum Chemical ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Theoretical Calculations ◽  
Pharmaceutical Compounds ◽  
Copper Corrosion ◽  
A Value ◽  
Synthetic Acid

Abstract It is known that if unused drugs are improperly disposed, they can pollute the environment. Furthermore, researchers are still trying to find an environmentally friendly corrosion inhibitor. These factors lead to the possible application of unused pharmaceutical compounds as corrosion inhibitors. The feasibility of an anti-inflammatory, analgesic and antipyretic drug, ibuprofen, was evaluated as a potential copper corrosion inhibitor in synthetic acid rain solution. This investigation was performed by applying electrochemical and weight loss measurements and quantum chemical calculations. The results obtained by these techniques revealed the ability of ibuprofen to protect copper from corrosion. The inhibition efficiency of ibuprofen rises with increase in its concentration and can reach a value of 97.3%. The results of surface analysis of treated coupons by scanning electron microscopy and theoretical calculations are consistent with the experimental results.

Corrosion of 85-5-5-5 bronze in natural and synthetic acid rain

2004 ◽  
Vol 79 (2) ◽  
pp. 363-367 ◽  
Author(s):  
L. Morselli ◽  
E. Bernardi ◽  
C. Chiavari ◽  
G. Brunoro
Keyword(s):  
Acid Rain ◽  
Synthetic Acid ◽  
Natural And Synthetic

Features of the microstructural and mechanical degradation of long term operated mild steel

2018 ◽  
Vol 9 (3) ◽  
pp. 296-306 ◽  
Author(s):  
Halyna Krechkovska ◽  
Oleksandra Student ◽  
Grzegorz Lesiuk ◽  
José Correia
Keyword(s):  
Impact Toughness ◽  
Acid Rain ◽  
Relative Elongation ◽  
Structural Features ◽  
Mechanical Tests ◽  
Mechanical Degradation ◽  
Content Type ◽  
Hydrogenation Condition ◽  
Synthetic Acid

Purpose The purpose of this paper is to assess the technical state of old and repair steels of Shukhov’s tower elements after operation during ~ 110 and 70 years of the water tower in Nikolaev, basing on their mechanical tests, metallography and fractography investigations. Design/methodology/approach For their certification, the fractographic and structural features and mechanical properties (hardness, strength, plasticity and impact toughness) were analyzed. Both the steels under consideration were characterized by low values of hardness and brittle fracture resistance. The mechanical characteristics of the old steel are lower compared with the repair one. It cannot be only explained by the quality of metal rolling. Moreover, the plasticity characteristics of both steels, defined in synthetic acid rain environment, are lower than in the air. Using fractography investigation, the operational damages in the bulk metal in the form of the elements of cleavage fracture in the central part of the fracture surfaces of specimens tested at the hydrogenation condition by synthetic acid rain environment were revealed. Findings The results of this study suggested a degradation of steels’ characteristics caused by the development of scattering damages during their operation. Higher relative elongation of the old steel at lower hardness and impact toughness were also evidenced in that. The metallography and fractography investigations also supported this finding. Originality/value This original study aimed at characterizing the microstructural and mechanical degradation of mild steels that was collected from Shukhov’s tower structural elements.

Friction and wear behavior of Cu–Cr–Zr alloy lubricated with acid rain

2014 ◽  
Vol 66 (3) ◽  
pp. 473-480
Author(s):  
Zhengfeng Jia ◽  
Yuchang Su ◽  
Yanqiu Xia ◽  
Xin Shao ◽  
Yanxin Song ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Wear Rate ◽  
Acid Rain ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Pure Water ◽  
Vacuum Induction Furnace ◽  
Content Type ◽  
X Ray ◽  
Zr Alloy

Purpose – The purpose of this paper is to investigate the tribological properties of a Cu–Cr–Zr alloy lubricated with acid rain. Design/methodology/approach – The Cu 2.5 weight per cent–Cr-0.08 weight per cent–Zr alloy was produced in a vacuum induction furnace. The H2SO4 + H2O, HNO3 + H2O and H2SO4 + HNO3 + H2O mixtures with pH of 5 were used as acid rain. Pure water was used as rain. The friction and wear properties of Cu–Cr–Zr alloy/American Iron and Steel Institute (AISI) 52100 steel couples lubricated with acid rain were investigated using a reciprocating ball-on-disc friction and wear tester (Optimol SRV, Germany). For investigating the properties of the alloy and wear scars, scanning electron microscopy, X-ray diffraction microscopy, energy dispersive X-ray spectrum, transmission electron microscopy and X-ray photoelectron spectroscope were used. Findings – The wear rate of the Cu–Cr–Zr alloy lubricated with H2O containing HNO3 (pH = 5) was larger than pure water under the same conditions. The tribofilms containing Cu, Cr, Zr, S and N formed during sliding with acid rain, but corrosion also took place at that time. Originality/value – The wear rate of the Cu–Cr–Zr alloy lubricated with H2O containing HNO3 (pH = 5) was larger than pure water, the wear and corrosion took place during sliding. As the trolley wires, the life of the Cu–Cr–Zr alloy was influenced by the environment.

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