Surface damage mitigation of TC4 alloy via micro arc oxidation for oil and gas exploitation application: Characterizations of microstructure and evaluations on surface performance

2018 ◽  
Vol 436 ◽  
pp. 467-476 ◽  
Author(s):  
Ruizhen Xie ◽  
Naiming Lin ◽  
Peng Zhou ◽  
Jiaojuan Zou ◽  
Pengju Han ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Surface Damage ◽  
Damage Mitigation ◽  
Tc4 Alloy ◽  
Micro Arc Oxidation ◽  
Surface Performance

scholarly journals Surface damage mitigation of Ti6Al4V alloy via thermal oxidation for oil and gas exploitation application: characterization of the microstructure and evaluation of the surface performance

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13517-13535 ◽  
Author(s):  
Naiming Lin ◽  
Qiang Liu ◽  
Jiaojuan Zou ◽  
Dali Li ◽  
Shuo Yuan ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Adhesive Wear ◽  
Surface Hardness ◽  
Surface Damage ◽  
Ti6al4v Alloy ◽  
Promising Candidate ◽  
Gas Well ◽  
Surface Performance ◽  
Oil Gas

Ti6Al4V alloy is a promising candidate for petroleum tube. However, low surface hardness, high/unstable friction coefficient, severe adhesive wear and susceptibility to galling are harmful for the direct application of Ti6Al4V alloy in oil/gas well.

scholarly journals Enhanced Properties of Micro Arc Oxidation Coating with Cu Addition on TC4 Alloy in Marine Environment

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1168
Author(s):  
Wei Gao ◽  
Jiangnan Liu ◽  
Jingpeng Wei ◽  
Yuhong Yao ◽  
Xiqun Ma ◽  
...  
Keyword(s):  
Marine Environment ◽  
Antibacterial Effect ◽  
Antibacterial Property ◽  
Wear Property ◽  
Wear Performance ◽  
Hard Particles ◽  
Bactericidal Effects ◽  
Tc4 Alloy ◽  
Micro Arc Oxidation ◽  
Simulated Seawater

By contrast with the traditional method of adding hard particles into micro arc oxidation (MAO) coating to improve its wear performance, this study introduced copper into the MAO coating on TC4 alloy by adding copper pyrophosphate to enhance the wear property in a marine environment and the antibacterial property. The results demonstrated that the MAO coating with copper pyrophosphate addition showed a porous structure, and Cu was mainly concentrated around micropores. CuO and Cu2O were formed in this MAO coating. This MAO coating with Cu had a high bonding strength to the substrate. Although the hardness of the coating with Cu had been reduced, it could reduce the friction coefficient and enhance the wear property in simulated seawater due to the lubrication of Cu. Furthermore, this MAO coating with Cu addition had obvious antibacterial and bactericidal effects due to the antibacterial effect of Cu.

scholarly journals Surface damage mitigation of titanium and its alloys via thermal oxidation: A brief review

2019 ◽  
Vol 58 (1) ◽  
pp. 132-146 ◽  
Author(s):  
Naiming Lin ◽  
Ruizhen Xie ◽  
Jiaojuan Zou ◽  
Jianfeng Qin ◽  
Yating Wang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Thermal Oxidation ◽  
Chemical Industry ◽  
Friction And Wear ◽  
Weight Ratio ◽  
High Strength ◽  
Surface Damage ◽  
Damage Mitigation ◽  
And Performance

AbstractTitanium (Ti) and its alloys have been extensively applied in various fields of chemical industry, marine, aerospace and biomedical devices because of a specific combination of properties such as high strength to weight ratio, exceptional corrosion resistance and excellent biocompatibility. However, friction and wear, corrosion which usually occur on the surfaces of Ti-base components can lead to degradation in both properties and performance. Thermal oxidation (TO) of titanium and its alloys under certain conditions can accomplish significant improvements both in wear resistance and corrosion resistance, without special requirements for substrate geometries. In this review, the studies and applications of TO process in surface damage mitigation titanium and its alloys were reviewed and summarized.

Effect of Thermal Oxidation Temperature on the Properties of Micro-Arc Oxidation Ceramic Coating on TC4 Alloy

2016 ◽  
Vol 697 ◽  
pp. 623-626
Author(s):  
Er Xin Ni ◽  
Ji Kang Yan ◽  
Yun Feng Wu ◽  
Yuan Teng ◽  
Zhi Cao Duan ◽  
...  
Keyword(s):  
Phase Composition ◽  
Surface Morphology ◽  
Thermal Oxidation ◽  
Ceramic Coating ◽  
Oxidation Temperature ◽  
Micro Hardness ◽  
Hardness Tester ◽  
Coating Surface ◽  
Tc4 Alloy ◽  
Micro Arc Oxidation

The effect of thermal oxidation temperature on the properties of MAO ceramic coating was investigated, The phase composition and surface morphology of composite oxidation coating were analyzed by XRD and SEM. The micro-hardness of composite oxidation coating were tested by micro hardness tester. The results shown that the composite oxidation coating consists of rutile, anatase Ti and HA. With the thermal oxidation temperature increasing, the micro-hardness of composite oxidation coatings were improved, but when the thermal oxidation temperature rose from 600 °C to 700 °C, the micro-hardness of coating dropped from 575 HV to 505 HV. With the thermal oxidation temperature increasing, the numbers of micro-porous on coating surface was decreased , and the composite oxidation coating became more density.

scholarly journals Nano/Micro Hierarchical Bioceramic Coatings for Bone Implant Surface Treatments

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1548
Author(s):  
Ken-Chung Chen ◽  
Tzer-Min Lee ◽  
Nai-Wei Kuo ◽  
Cheng Liu ◽  
Chih-Ling Huang
Keyword(s):  
Hydrothermal Treatment ◽  
Hierarchical Structure ◽  
Bone Repair ◽  
Hierarchical Structures ◽  
Surface Damage ◽  
Surface Treatments ◽  
P Value ◽  
Implant Surface ◽  
Bone Implant ◽  
Micro Arc Oxidation

Bone implants with surface modifications that promote the physiological activities of osteoblasts are the first step for osseointegration in bone repair. Hydroxyapatite is the main inorganic component in mammal bones and teeth, and nanoscaled hydroxyapatite promotes the adhesion of osteoblastic cells. In this study, we created a nano/micro hierarchical structure using micro-arc oxidation coatings and hydrothermal treatments at 150 °C, 175 °C, and 200 °C for 2, 6, 12, and 24 h. After undergoing hydrothermal treatment for 24 h, CaTiO3 began forming regular-shaped crystals at the surface at 175 °C. In order to decrease the CaTiO3 formations and increase the apatite fabrication, a shorter time of hydrothermal treatment was required at 175 °C. There was still surface damage on samples treated for 6 h at 175 °C; however, the nano/micro hierarchical structures were formed in 2 h at 175 °C. The normalized alkaline phosphatase (ALP) activities of the MC3T3-E1 cells with micro-arc oxidation (MAO) coatings and nano/micro hierarchical bioceramics coatings were 4.51 ± 0.26 and 7.36 ± 0.51 μmol p-NP/mg protein (*** P value of <0.001), respectively. The MC3T3-E1 cells with coatings showed highly statistically significant results in terms of the ALP activity. This proposed nano/micro hierarchical structure promoted cell proliferation and osteogenic differentiation of the osteoblast MC3T3-E1 cells. This study realized a promising nano system for osseointegration via bone implant surface treatments, which can promote the physiological activities of osteoblasts.

Study on Morphologies and Structures of Ceramic Coating Prepared by Micro-Arc Oxidation on TC4 Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 395-399 ◽  
Author(s):  
Chao Shi Qian ◽  
Peng Fei Li ◽  
Liang Liu ◽  
Feng Guo ◽  
Ya Ya
Keyword(s):  
Titanium Dioxide ◽  
Ceramic Coating ◽  
Atomic Ratio ◽  
Process Conditions ◽  
Mixture Ratio ◽  
Tc4 Titanium Alloy ◽  
Calcium Phosphorus ◽  
Tc4 Alloy ◽  
Micro Arc Oxidation ◽  
Modification Of Titanium

In this work, the effects of concentration and mixture ratio of Ca(CH3COO)2•H2O and Na5P3O10 in electrolyte on surface morphology, surface content and atomic ratio of calcium and phosphorus elements, and phase structure of ceramic coating prepared by micro-arc oxidation（MAO）on TC4 titanium alloy were studied, a suitable formula of electrolyte for bio-modification of titanium by MAO was obtained, Ca(CH3COO)2•H2O 20 g/L and Na5P3O10 9.3 g/L. Using this electrolyte with appropriate process conditions, the ceramic coating was prepared with porosity structure and combines well with the substrate. The pores distributed equably on the surface of ceramic coating and the size of the pores was in micron order. The surface of the ceramic coating contains calcium, phosphorus elements and their atom ratio is about 1.69 which nears to that of hydroxyapatite. The ceramic coating was composed of titanium dioxide in different crystal types which have been characterized by the X-ray diffraction (XRD). The anatase titanium dioxide was a major component.

Surface damage mitigation of fused silica with CO 2 laser

2010 ◽  
Author(s):  
Xi-Bin Li ◽  
Hai-Bing Lv ◽  
Xia Xiang ◽  
Hai-Jun Wang ◽  
Meng Chen ◽  
...  
Keyword(s):  
Surface Damage ◽  
Fused Silica ◽  
Damage Mitigation
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