Influence of Graphene on Microstructure and Corrosion and Wear Resistance of Micro-Arc Oxidation Coatings on D16T Al Alloy Drill Pipe

The coatings containing zirconia were produced on LY12 Aluminium alloy by micro-arc oxidation in K2ZrF6 and NaH2PO2 solution. The composition, structure, hardness, friction and wear resistance and corrosion resistance of the coating were studied by XRD, SEM, EDS, ball-on-disk friction tester and electrochemical analyzer, respectively. The results show that coating was composed of m-ZrO2 and t-ZrO2. There were a large amount of Zr and O and a little Al, P and K in the coating. The thickness of coating prepared for 3h was 168μm and the maximum value of the hardness was up to 16.75GPa. The friction and wear resistance and corrosion resistance were improved, compared with the LY12 aluminium alloy substrate.

Download Full-text

One‐step preparation of the superhydrophobic Al alloy surface with enhanced corrosion and wear resistance

Materials and Corrosion ◽

10.1002/maco.202012144 ◽

2020 ◽

Author(s):

Tian Shi ◽

Xuewu Li ◽

Chuanwei Zhang ◽

Hongxing Wang ◽

Zhenyan He ◽

...

Keyword(s):

Wear Resistance ◽

Corrosion And Wear ◽

Alloy Surface ◽

Al Alloy ◽

One Step

Download Full-text

Robust Micro Arc Oxidation Coatings on 6061 Aluminum Alloys via Surface Thickening and Microvoid Reducing Approach

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.279.148 ◽

2018 ◽

Vol 279 ◽

pp. 148-152 ◽

Cited By ~ 1

Author(s):

Qing Jun Zhu ◽

Bin Bin Wang ◽

Xia Zhao ◽

Bin Bin Zhang

Keyword(s):

Wear Resistance ◽

Ceramic Coatings ◽

Al Alloy ◽

Friction Resistance ◽

Micro Arc Oxidation ◽

Electrolyte Surface ◽

Thickness Meter ◽

6061 Al Alloy ◽

Surface Morphologies ◽

Scanning Electron

The hardness and wear resistance of micro arc oxidation (MAO) ceramic coatings were influenced by phase compositions, surface thickness, porosity and microcracks. In this work, ceramic coatings with enhanced microhardness and friction resistance were fabricated on 6061 Al-alloy by increasing thickness and decreasing porosity through adding sodium hexametaphosphate ((NaPO3)6) as additive in silicate-based electrolyte. Surface morphologies and microhardness of the as-fabricated MAO coatings were evaluated using scanning electron microscope (SEM) and thickness meter. As a binary additive, the addition of (NaPO3)6 in electrolytes can obviously change the surface morphologies, thickness and microhardness of the resultant MAO coatings.

Download Full-text

Influence of Voltage on the Corrosion and Wear Resistance of Micro-Arc Oxidation Coating on Mg–8Li–2Ca Alloy

Acta Metallurgica Sinica (English Letters) ◽

10.1007/s40195-018-0845-y ◽

2018 ◽

Vol 32 (2) ◽

pp. 194-204 ◽

Cited By ~ 10

Author(s):

Bing-Yu Qian ◽

Wei Miao ◽

Min Qiu ◽

Fan Gao ◽

Dong-Hui Hu ◽

...

Keyword(s):

Wear Resistance ◽

Corrosion And Wear ◽

Micro Arc Oxidation

Download Full-text

Corrosion and Wear Behavior of WC–10Co4Cr Coating under Saturated Salt Drilling Fluid

Materials ◽

10.3390/ma14237379 ◽

2021 ◽

Vol 14 (23) ◽

pp. 7379

Author(s):

Hao Yin ◽

Jian Liang ◽

Xiaoyong Ren ◽

Jie Zhao ◽

Xin He ◽

...

Keyword(s):

Wear Resistance ◽

Corrosion Potential ◽

Erosion Resistance ◽

Wear Behavior ◽

Drilling Fluid ◽

Drill Pipe ◽

Corrosion Current ◽

Corrosion And Wear ◽

Simulation Results ◽

Pipe Joint

Coating on the surface is one of the main ways to improve the corrosion resistance and wear resistance of materials. In this work, the corrosion, erosion, and wear resistance of WC–10Co4Cr coating and 27CrMoV substrate were compared by simulating the actual working conditions of the drill pipe. The simulation results show that the most serious corrosion occurred at the pipe body and the dominating erosion arose at the pipe joint closing to the inlet of the flow field. WC–10Co4Cr coating has excellent protection to 27CrMoV substrate, resulting in a 400 mV increase in corrosion potential, a two-orders-of-magnitude decrease in the corrosion current, and four times the improvement of the impedance value. The erosion resistance of the WC–10Co4Cr coating increased to more than 30% higher than that of the 27CrMoV substrate. The friction coefficient of the WC–10Co4Cr coating was much lower than that of the 27CrMoV substrate, and the wear resistance of the coating was higher than that of the substrate.

Download Full-text