INFLUENCE OF SURFACE ROUGHNESS OF SUBSTRATE ON THE PROPERTIES OF Ni–Co–Fe ELECTRODEPOSITION COATING ON COPPER

2018 ◽  
Vol 25 (08) ◽  
pp. 1850120 ◽  
Author(s):  
ANG KONG ◽  
BEN-KUI GONG ◽  
GANG WANG ◽  
HONG-WEI CUI
Keyword(s):  
Surface Roughness ◽  
Corrosion Resistance ◽  
Coating Thickness ◽  
Copper Substrate ◽  
Maximum Level ◽  
Copper Surface ◽  
Potentiodynamic Polarization Curve ◽  
Bonding Force ◽  
Comprehensive Properties ◽  
Coating Roughness

Effects of copper surface roughness [Formula: see text] on the properties of Ni–Co–Fe alloy coatings were studied by the measurement of coating roughness, thickness, hardness, substrate/coating bonding force and the potentiodynamic polarization curve. Results showed that at the current density of 4[Formula: see text]A/dm2, the coating roughness increased with the increase of the value of substrate [Formula: see text] in the range 0.1–1.1[Formula: see text][Formula: see text]m. The coating thickness and hardness increased with the decrease of substrate [Formula: see text]. When substrate [Formula: see text] was 0.4[Formula: see text][Formula: see text]m, the substrate/coating bonding force reached the maximum level. When substrate [Formula: see text] was 0.1[Formula: see text][Formula: see text]m, the coating exhibited the best corrosion resistance. The comprehensive properties of the Ni–Co–Fe coatings can be effectively improved by controlling the surface roughness of copper substrate properly.

Effect of Duty Cycle on Microstructure and Corrosion Resistance of MAO Coatings Fabricated on AZ91D Magnesium Alloy in an Optimized Dual Electrolyte

2013 ◽  
Vol 668 ◽  
pp. 779-783 ◽  
Author(s):  
Shu Yan Wang ◽  
Yong Ping Xia ◽  
Li Liu ◽  
Qiao Chen
Keyword(s):  
Surface Roughness ◽  
Corrosion Resistance ◽  
Phase Composition ◽  
Magnesium Alloy ◽  
Coating Thickness ◽  
Duty Cycle ◽  
Microarc Oxidation ◽  
Ceramic Coatings ◽  
Relative Content ◽  
Az91d Magnesium Alloy

Ceramic coatings were fabricated on AZ91D magnesium alloy in a novel optimized dual electrolyte by Microarc oxidation. The influence of duty cycle on coating thickness, surface roughness, phase composition, microstructure and corrosion resistance were studied. It is found that both the thickness and surface roughness of coatings increases gradually with the increasing of duty cycle. XRD results show that all the coatings are mainly composed of MgO, Mg2SiO4 and MgAl2O4. The results of potentiodynamic polarization tests indicate that the coating formed at 40% duty cycle exhibits a better corrosion resistance as a result of its relatively compact microstructure and more relative content of Mg2SiO4 and MgAl2O4 phases.

scholarly journals Analysis and Research on characteristics and corrosion resistance of graphene attached to copper surface

2021 ◽  
Vol 261 ◽  
pp. 02034
Author(s):  
Rong-Bu He
Keyword(s):  
Corrosion Resistance ◽  
Rate Ratio ◽  
Electrochemical Impedance ◽  
Graphene Film ◽  
Copper Substrate ◽  
Copper Surface ◽  
Curve Analysis ◽  
Flow Rate Ratio ◽  
Growth Time ◽  
Optimal Process

The adhesion of graphene on copper surface was studied, and its chemical characteristics and corrosion resistance were analyzed. The results of polarization curve analysis show that the corrosion resistance of graphene film is the best when the growth time is 7 min. electrochemical impedance spectroscopy shows that the corrosion resistance of copper substrate is improved by 17 times. The graphite strips prepared at 7 min have the best uniformity and continuity. The graphite residue at 4 min is thin but discontinuous. The graphite strips at 10 min have the thickest thickness but the most grain boundary defects. The optimal process parameters were determined as follows: AR / CH4 / H2 flow rate ratio 600 / 40 / 30 SCCM, temperature 1000 ° C, reaction time 7 min.

Effect of Time Voltage and Voltage of 1100 Aluminum Coating Using Chitosan Using Electrodeposition Method

2020 ◽  
Vol 844 ◽  
pp. 32-37
Author(s):  
Puth H. Setyarini ◽  
Femiana Gapsari ◽  
Agil Setyawan
Keyword(s):  
Surface Roughness ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Layer Thickness ◽  
Coating Thickness ◽  
Thickness Measurement ◽  
Thickness Gauge ◽  
Electrodeposition Process ◽  
Electrodeposition Method ◽  
Coating Thickness Measurement

Aluminum has mechanical properties such as light, easy to form, and the ability to conduct heat and electricity, but has less corrosion resistance properties. One effort to improve corrosion resistance in aluminum is by electrodeposition method. The electrodeposition process was carried out with a variation of time 10, 20, and 30 minutes and variations in voltage of 5 V, 10 V, and 15 V using AA 1100. The electrolyte used was a mixture of acetic acid and chitosan. Coating thickness measurement was carried out using NOVOTEST TP-1M coating thickness gauge, the corrosion rate was measured with 128N Autolab PGSTAT Potentiodynamic and surface roughness measurements using Mitutoyo SJ-210 Surface Roughness Tester. Based on the research data, it was found that the results of optimum layer thickness were obtained at 10 Volt variation of 20 minutes at 11 μm ± 0.04%. Specimens without treatment had the highest corrosion rate of 0.25541 mpy while the lowest corrosion rate was in the 10 variations of 20 minutes which produced 0.0078935 mpy. The surface roughness data of the specimen without treatment was 1.034 μm. The results of the smallest surface roughness were obtained at 10 V 20 minutes variation of 0.725 μm, while the largest surface roughness results in a variation of 15 V 30 minutes which was 2.529 μm. In this stud, it is known that the higher the time and stress used in the electrodeposition process results in greater corrosion rates, because it produces a higher layer thickness but results in higher surface roughness as well.

Embracing Uncertainty: Modeling the Standard Uncertainty in Electron Probe Microanalysis—Part I

2020 ◽  
Vol 26 (3) ◽  
pp. 469-483
Author(s):  
Nicholas W. M. Ritchie
Keyword(s):  
Surface Roughness ◽  
Expert System ◽  
Coating Thickness ◽  
Electron Probe ◽  
Uncertainty Modeling ◽  
Measurement Model ◽  
Standard Uncertainty ◽  
X Ray ◽  
Error Bars ◽  
New Framework

AbstractThis is the first in a series of articles which present a new framework for computing the standard uncertainty in electron excited X-ray microanalysis measurements. This article will discuss the framework and apply it to a handful of simple, but useful, subcomponents of the larger problem. Subsequent articles will handle more complex aspects of the measurement model. The result will be a framework in which sophisticated and practical models of the uncertainty for real-world measurements. It will include many long overlooked contributions like surface roughness and coating thickness. The result provides more than just error bars for our measurements. It also provides a framework for measurement optimization and, ultimately, the development of an expert system to guide both the novice and expert to design more effective measurement protocols.

Fabrication of superhydrophobic copper surface with excellent corrosion resistance

2014 ◽  
Vol 119 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Libang Feng ◽  
Libin Zhao ◽  
Xiaohu Qiang ◽  
Yanhua Liu ◽  
Zhiqiang Sun ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Copper Surface ◽  
Excellent Corrosion Resistance

Relationships between Textures and Surface Roughness, Frictional Behavior, Erosion and Corrosion Properties of TiN Films

2004 ◽  
Vol 449-452 ◽  
pp. 781-784 ◽  
Author(s):  
Hee Dong Kim ◽  
In Soo Kim ◽  
Dong Young Sung ◽  
Min Gu Lee ◽  
S. Dost ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Corrosion Resistance ◽  
Friction Coefficient ◽  
Physical Vapor Deposition ◽  
Textured Surface ◽  
Corrosion Properties ◽  
Tin Films ◽  
Physical Vapor Deposition Method ◽  
Erosion Corrosion ◽  
Better Than

TiN coated films were prepared by a reactive ion physical vapor deposition method. In this research, we studied the relationships between textures and friction coefficient, erosion-corrosion resistance and corrosion resistance in textured TiN films. The surface roughness of (115) textured TiN films is lower than that of (111) textured TiN films. The friction coefficient of (115) textured surface is similar with that of (111) textured surface of TiN coated films. The erosion-corrosion and corrosion resistance of (115) textured surface is better than that of (111) textured surface of TiN coated films.

Influence of Electron Beam Pulsed Times on the Properties of 40Cr

2010 ◽  
Vol 154-155 ◽  
pp. 1170-1177
Author(s):  
Yuan Fang Chen ◽  
Xiao Dong Peng ◽  
Jian Jun Hu ◽  
Hong Bin Xu ◽  
Chan Hao
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Electron Beam ◽  
High Current ◽  
Wear Properties ◽  
X Ray ◽  
Pulsed Electron Beam ◽  
Surface Microstructures ◽  
40Cr Steel

Surface modification of 40Cr steel by high current pulsed electron beam has been investigated . The pulsed times of HCPEB was changed from 1 to 25 to prepare different specimens. Surface microstructures and section microstructures after HCPEB irradiation were detected by using metallurgical microscope, SEM and X-ray diffractometer. It is shown that crater defects were found on the surface after the irradiation of HCPEB and the density of craters will decrease with increasing pulses times. When treated by 27Kev accelerating voltage, with increasing pulse times, the particles located in surface layer were obviously refined .The surface roughness, hardness, wear properties and corrosion resistance were analyzed after irradiation of HCPEB. The wear resistance and corrosion resistance were obviously enhanced after 10 pulses treatment.

scholarly journals PENGARUH SPUTTERING TiN TERHADAP KEKASARAN, KEKERASAN PERMUKAAN MATERIAL AISI316L

2019 ◽  
Vol 18 (3) ◽  
pp. 331-338
Author(s):  
Jemssy Ronald Rohi ◽  
Priyo Tri Iswanto ◽  
Tjipto Sujitno ◽  
Erich Umbu Kondi
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Corrosion Resistance ◽  
Deposition Time ◽  
Low Cost ◽  
Surface Hardness ◽  
The Body ◽  
Aisi 316L ◽  
Good Corrosion Resistance ◽  
Long Time

AISI 316L is widely used for implantation in orthopedic surgery due to its good corrosion resistance, mechanical properties and low cost. However, AISI 316L is not well suited for biocompatibility with the body, so implant material with AISI 316L can’t be used for a long time. One way to improve the corrosion resistance and mechanical properties of AISI 316L is to perform a surface treatment such as sputtering. This study discusses the effect of deposition sputtering TiN of 60, 90, 120 and 150 minutes on roughness and surface hardness at a ratio of argon gas and nitrogen to 80% Ar:20% N2. The results of the surface roughness value of the TiN sputtering layer deposited to AISI 316L for 60, 90, 120, and 150 minutes were 0.02 μm, 0.04 μm, 0.06 μm, and 0.04 μm respectively. This shows that the coating time of TiN in AISI 316L has no significant influence on value of surface roughness. Surface hardness results at 60, 90, 120, and 150 minutes were obtained with 268 HVN, 275 HVN, 278 HVN and 282 HVN. Increased hardness value, as the TiN thin layer has a higher hardness value compared to AISI 316L. The longer the deposition time, the more layers are formed and the layer becomes thicker. With the thickness of the layer, the density at the grain boundary increases. Because the higher density leads to grain growth, in which form micropores.

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