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 Electroless Nickel–Boron Deposit from Optimized Stabilizer-Free Bath

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 576
Author(s):  
Muslum Yunacti ◽  
Alexandre Mégret ◽  
Mariana Henriette Staia ◽  
Alex Montagne ◽  
Véronique Vitry
Keyword(s):  
Corrosion Resistance ◽  
Salt Spray ◽  
Indentation Test ◽  
Electroless Nickel ◽  
Industrial Applications ◽  
Toxic Heavy Metal ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance ◽  
Instrumented Indentation Test

Conventional electroless nickel–boron deposits are produced using solutions that contain lead or thallium, which must be eliminated due to their toxicity. In this research, electroless nickel–boron deposits were produced in a stabilizer-free bath that does not include any toxic heavy metal. During processing, the plating rate increased from 10 to 14.5 µm/h by decreasing the concentration of the reducing agent, leading to increased bath stability. The thickness, composition, roughness, morphology, hardness, wear, and corrosion resistance of the deposits were characterized. The new deposit presents an excellent hardness of 933 ± 56 hv50, 866 ± 30 hk50, and 12 GPa from the instrumented indentation test (IIT), respectively, which are similar to that of hexavalent hard chromium coating. Moreover, by using both potentiodynamic polarization and salt spray tests it was shown that the coating presents higher corrosion resistance as compared to standard nickel-boron coatings. The new deposit exhibits properties close to those of the conventional electroless nickel–boron deposits. Therefore, it could replace them in any industrial applications.

INFLUENCE CuAl10Fe3Mn2 ADDITI VE ON ULTIMATE TENSILE STRENGTH AND WEAR OF Al-9%SiMg ALLOY

Tribologia ◽  
2018 ◽  
Vol 279 (3) ◽  
pp. 83-89
Author(s):  
Tomasz LIPIŃSKI
Keyword(s):  
Tensile Strength ◽  
Corrosion Resistance ◽  
Weight Ratio ◽  
High Strength ◽  
Independent Variables ◽  
Low Thermal Expansion ◽  
Wear And Corrosion ◽  
Study Results ◽  
Aluminium Bronze ◽  
Wear And Corrosion Resistance

One of the most common castings applied in industrial production is aluminium-silicon alloy (ca. 9% Si with Mg). The Al-SiMg alloys have high corrosion resistance, high strength to weight ratio with modifications, very good castability, a low thermal-expansion coefficient, and relatively good wear resistance. These properties make it possible to widely apply the foundry Al-9% SiMg alloy to number of aviation, automotive, and others materials working on tribological applications. Similar to silumins, the aluminium bronze CuAl10Fe3Mn2 is characterized by good mechanical properties and wear and corrosion resistance. This paper presents the research on the treatment of Al-9%SiMg alloy with a composition of CuAl10Fe3Mn2 in different mass ranges. The experiments were conducted by a factor plan 23 for three independent variables. The main additions were strontium, Al-9%SiMg, aluminium bronze, as well as pure or melted with raw silumin. The effect of the tested additions on the microstructure and tensile strength of the Al-9%SiMg alloy was presented in figures. All analysed parameters (mechanical and tribological) of the hypo-eutectic Al-9%SiMg alloy with tested bronze additions are improved. Based on the analysis of the study results, it was found that the microstructure and tensile strength of the tested alloy are determined through the contents introduced of CuAl10Fe3Mn2 to the alloy.

scholarly journals Influence of Laser Cladding Parameters on Microstructure, Microhardness, Chemical Composition, Wear and Corrosion Resistance of Fe–B Composite Coatings Reinforced with B4C and Si Particles

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 809 ◽  
Author(s):  
Dariusz Bartkowski ◽  
Aneta Bartkowska ◽  
Adam Piasecki ◽  
Peter Jurči
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Chemical Composition ◽  
Laser Beam ◽  
Laser Cladding ◽  
Scanning Speed ◽  
Powder Mixtures ◽  
Wear And Corrosion ◽  
Study Results ◽  
Wear And Corrosion Resistance

The paper presents the study results of a laser cladding process of C45 steel using powder mixtures. The aim of this study was to investigate the microstructure, X-ray diffraction (XRD), chemical composition (EDS), microhardness, corrosion resistance and wear resistance of the newly obtained coatings. Modified coatings were prepared using laser cladding technology. A 1 kW continuous wave Yb:YAG disk laser with a powder feeding system was applied. Two different powder mixtures as well as various laser beam parameters were used. The first powder mixture contained Fe–B, and the second mixture was Fe–B–B4C–Si. Two values of laser beam power (600 and 800 W) and three values of scanning speed (600, 800, and 1000 mm/min) were applied during the studies. As a result of the influence of the laser beam, the zones enriched with modifying elements were obtained. Based on the results of XRD, the presence of phases derived from borides and carbides was found. In all cases analyzed, EDS studies showed that there is an increased content of boron in the dendritic areas, while there is an increased silicon content in interdendritic spaces. The addition of B4C and Si improved properties such as microhardness as well as wear and corrosion resistance. The microhardness of the coating increased from approx. 400 HV to approx. 1100 HV depending on the laser parameters used. The best corrosion resistance was obtained for the Fe–B–B4C–Si coating produced using the highest laser beam scanning speed. An improvement in wear resistance can be seen after wear tests, where the weight loss decreased from about 0.08 g to about 0.05 g.

Properties of TiN Coating Prepared on 3Cr2W8V by Electron Beam Surface Alloying Process

2011 ◽  
Vol 230-232 ◽  
pp. 698-703 ◽  
Author(s):  
Yuan Fang Chen ◽  
Xiao Dong Peng ◽  
Kang Chen ◽  
Jian Jun Hu ◽  
Hong Bin Xu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Electron Beam ◽  
Friction Coefficient ◽  
Corrosion Potential ◽  
Corrosion Current ◽  
Surface Alloying ◽  
Tin Coating ◽  
Wear And Corrosion ◽  
Beam Surface ◽  
Wear And Corrosion Resistance

TiN coating was deposited on 3Cr2W8V alloy by PVD and then processed with electron beam surface alloying process. The microstructure, microhardness, friction coefficient, amount of wear and corrosion resistance of electron beam treated specimens were investigated. It is shown that the electron beam treated specimens can improve the properties of material. The coating has an average microhardness of approximately HV800, the friction coefficient of electron beam irradiation treated specimens is considerably lower than that of TiN coating. When the electron beam irradiate times is appropriate, the roughness of surface will much lower, and it will achieve polishing effects. The corrosion behavior of the composite coating in 3.5% Nacl solution at room temperature was also determined using a potentiont state system. In comparion with the corrosion potential for 3Cr2W8V alloy, the corrosion potentials of TiN coating and electron beam treated specimen are increased respectively. The electron beam treated specimen has the lowest corrosion current density as well as the highest corrosion potential showing an improved corrosion resistance compared with 3Cr2W8V alloy.

Pulse reverse electrodeposition and characterization of nanocrystalline zinc coatings

RSC Advances ◽  
2014 ◽  
Vol 4 (94) ◽  
pp. 52562-52570 ◽  
Author(s):  
Qingyang Li ◽  
Zhongbao Feng ◽  
Jinqiu Zhang ◽  
Peixia Yang ◽  
Fenghuan Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Zinc Coating ◽  
Mechanical Wear ◽  
Sulfate Bath ◽  
Wear And Corrosion ◽  
Pulse Reverse ◽  
Wear And Corrosion Resistance ◽  
Zinc Coatings

A nanocrystalline zinc coating is produced by pulse reverse electrodeposition in a sulfate bath with polyacrylamide as the only additive and the mechanical, wear and corrosion resistance properties are evaluated.

Wear and corrosion resistance of laser surface hardened structural steel

2002 ◽  
Vol 161 (2-3) ◽  
pp. 125-134 ◽  
Author(s):  
D.I Pantelis ◽  
E Bouyiouri ◽  
N Kouloumbi ◽  
P Vassiliou ◽  
A Koutsomichalis
Keyword(s):  
Corrosion Resistance ◽  
Structural Steel ◽  
Laser Surface ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance
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