Characterization of the corrosion performance of aluminium laser alloyed with stellite-6 and zirconium powders

2012 ◽  
Author(s):  
Given Rambau ◽  
Patricia Popoola ◽  
Tebogo Mathebula ◽  
Sisa Pityana
Keyword(s):  
Corrosion Performance ◽  
Stellite 6

scholarly journals The Corrosion Performance of Galvanized Steel in Closed Rusty Seawater

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Shuan Liu ◽  
Huyuan Sun ◽  
Ning Zhang ◽  
Lijuan Sun
Keyword(s):  
Hydrostatic Pressure ◽  
Electrochemical Impedance ◽  
Zinc Coating ◽  
Chemical Characterization ◽  
Galvanized Steel ◽  
Corrosion Performance ◽  
Rust Layer ◽  
Tafel Polarization ◽  
Effects Of Temperature

The corrosion performance of galvanized steel in closed rusty seawater (CRS) was investigated using weight loss, Tafel polarization curve, and electrochemical impedance spectroscopy. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were carried out for morphological and chemical characterization of the rust layer absorbed on the zinc coating. Effects of temperature and hydrostatic pressure on corrosion resistance of galvanized steel were studied. Results indicated that rust layer could induce pitting corrosion on the zinc coating under the Cl−erosion; high temperature accelerated the corrosion rate of zinc coating and inhibited the absorption of rust layer; the polarization resistance (Rp) of galvanized steel increased with the increase of hydrostatic pressure in CRS.

Characterization of the microstructure and corrosion performance of Ce-alloyed Nd-Fe-B magnets

2017 ◽  
Vol 692 ◽  
pp. 190-197 ◽  
Author(s):  
Elisa Isotahdon ◽  
Elina Huttunen-Saarivirta ◽  
Veli-Tapani Kuokkala
Keyword(s):  
Corrosion Performance

Characterization of Ceramic Coatings on ZL114 Aluminum Alloy Prepared in Alkaline Electrolyte Adding Nano-Al2O3 by Micro-Arc Oxidation

2011 ◽  
Vol 418-420 ◽  
pp. 804-807 ◽  
Author(s):  
Jun Zhao ◽  
Jian Jun Xi
Keyword(s):  
Aluminum Alloy ◽  
Surface Properties ◽  
Alkaline Solution ◽  
Ceramic Coatings ◽  
Alkaline Electrolyte ◽  
Corrosion Performance ◽  
Micro Arc Oxidation

ZL114 aluminum alloy samples were treated by micro-arc oxidation using alkaline solution added different amount of nano-Al2O3to improve the surface properties. Effects of the additives were investigated by thickness, hardness, morphologies and corrosion performance. The results indicated that proper amount of nano-Al2O3had certain contribution with higher corrosion performance. And adding too much nano-Al2O3decreased the property of ceramic coatings.

Synthesis and Characterization of Low Cost MgO Nanoparticle for the Assessment of the corrosion performance on Aluminium 6065

2017 ◽  
Vol 4 (11) ◽  
pp. 12118-12124 ◽  
Author(s):  
K.N. Shravana Kumara ◽  
H.P. Nagaswarupa ◽  
K.R. Vishnu Mahesh ◽  
M. Mylarappa ◽  
S.C. Prashantha ◽  
...  
Keyword(s):  
Low Cost ◽  
Synthesis And Characterization ◽  
Corrosion Performance ◽  
Mgo Nanoparticle

scholarly journals Characterization of Wear and Corrosion Resistance of Stellite 6 Laser Surfaced Alloyed (LSA) with Rhenium

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 292
Author(s):  
Irina Smolina ◽  
Karol Kobiela
Keyword(s):  
Corrosion Resistance ◽  
Process Parameters ◽  
Corrosion Potential ◽  
Laser Surface ◽  
Stellite 6 ◽  
Wear And Corrosion ◽  
Study Results ◽  
Wear And Corrosion Resistance ◽  
Better Than

This paper presents the method of preparation and study results of the Stellite 6 laser surface alloyed (LSA) with rhenium using na LDF diode laser (4000 W). During this process, a rhenium powder was introduced onto the surface of the Co-based alloy. The possibility of improving wear and corrosion resistance properties is interesting and worth investigating. The selected process parameters: the laser power of 900 W, powder feed rate in the range 1.92–3.83 g/min, and necessarily preheating of the substrate up to 200 °C—allowing to obtain the LSA layers on the Stellite 6 substrate. Depending on the process parameters, it is possible to modify the substrate’s surface layer in terms of rhenium concentration and geometrical characteristics of the laser tracks. It was found that undissolved particles of rhenium in laser-alloyed layers have a non-significant effect on their hardness and abrasion resistance. The laser surface-alloyed corrosion potential is better than the corrosion potential of the Stellite 6 substrate, including reducing resistance to pitting corrosion with a high ability to repassivation.

scholarly journals Characterization of Microstructure and Mechanical Properties of Stellite 6 Part Fabricated by Wire Arc Additive Manufacturing

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 474 ◽  
Author(s):  
Zixiang Li ◽  
Yinan Cui ◽  
Jie Wang ◽  
Changmeng Liu ◽  
Jiachen Wang ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Mechanical Performance ◽  
Stress Relief ◽  
Manufacturing Technology ◽  
Additive Manufacturing Technology ◽  
Stellite 6 ◽  
Average Hardness ◽  
Traditional Processing ◽  
Wire Arc Additive Manufacturing

Stellite 6 alloy has excellent wear resistance, corrosion resistance, and oxidation resistance, however the difficulties in traditional processing limit its wide application. Additive manufacturing technology that has emerged in recent years is expected to provide a new way for the processing of stellite 6 alloy. In this study, two square thin-walled stellite 6 parts were fabricated through the wire arc additive manufacturing technology. At the same time, the effect of stress relief annealing on the mechanical performance of the fabricated stellite 6 part was studied and compared with the corresponding casting part. The results indicate that the additive manufacturing stellite 6 components exhibit satisfactory quality and appearance. Moreover, the microstructure of the additive manufacturing part is much finer than that of the casting part. From the substrate to the top region of the additive manufacturing part, the morphology of the dendrites changes from columnar to equiaxed, and the hardness increases firstly and then decreases gradually. In addition, the average hardness of the additive manufacturing part is ~7–8 HRC higher than the casting part. The ultimate tensile strength and yield strength is ~150MPa higher than the casting part, while the elongation is almost the same. The stress relief annealing has no significant effect on the hardness of the AM part, but it can slightly improve the strength.

scholarly journals Scanning microelectrochemical characterization of the anti-corrosion performance of inhibitor films formed by 2-mercaptobenzimidazole on copper

2012 ◽  
Vol 74 (3) ◽  
pp. 526-533 ◽  
Author(s):  
Javier Izquierdo ◽  
Juan José Santana ◽  
Sergio González ◽  
Ricardo M. Souto
Keyword(s):  
Corrosion Performance

scholarly journals The Characterization of Co-Ni-Fe Coating in Different pH Environment

2019 ◽  
Vol 8 (4) ◽  
pp. 6950-6955
Keyword(s):  
Ph Value ◽  
Strong Acid ◽  
Alloy Coating ◽  
Weak Acid ◽  
Corrosion Performance ◽  
High Corrosion Resistance ◽  
Electrodeposition Process ◽  
High Microhardness ◽  
Coating Alloy

This study aims to produce a Co-Ni-Fe alloy coating on a mild steel hollow cylinder shape by electrodeposition process and analyze the effect of different pH on the corrosion performance of the alloy coating. During the electrodeposition process, the temperature and time are set to 50°C and 30 minutes, respectively. Different pH value consisting of pH 2.1 (strong acid), 5.2 (weak acid), 6.9 (neutral), 8.4 (weak alkali) and 12.3 (strong alkali) are used. From the results obtained it was found that the deposited Co-Ni-Fe alloy has excellent corrosion performance. Corrosion rate obtained for strong acid, weak acid, neutral, weak alkali and strong alkali are 5.88 mmpy, 2.95 mmpy, 1.17 mmpy, 2.16 mmpy and 5.72 mmpy, respectively. Hence this studied showed that Co-Ni-Fe coating alloy could be used as an alternative to prevent against corrosion due to its high corrosion resistance as well as high microhardness.

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

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