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Scalable, fluorine free and hot water repelling superhydrophobic and superoleophobic coating based on functionalized Al_(2)O_(3) nanoparticles

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Journal of Materials Science & Technology 2021年第7期66卷 74-81页

作者： Binbin Zhang Weichen Xu Qingjun Zhu baorong hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Hot water droplet and oils induced air cushion failure, intensively used fluorine-containing chemicals,tedious preparation process, etc. are the main bottlenecks of the current artificially fabricated superhydrophobic materials, restricting their large-scale production and real-world applications. Herein, a facile,scalable, fluorine-free spray-coating strategy was employed to achieve superhydrophobic and superoleophobic polymerized organosilanes/Al2O3 nanoparticles(POS/Al_(2)O_(3) NPs) coatings. The POS/Al_(2)O_(3) NPs coating was achieved through hydrolytic condensation of tetraethyl orthoilicate(TEOS) and hexadecyltrimethoxysilane(HDTMS) in the presence of Al2O3 NPs. A variety of analytical techniques including scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS), energy dispersive X-ray photoelectron spectroscopy(EDS) were used to investigate the fabricated coatings. The POS/Al_(2)O_(3) NPs coating features high contact angle(>158°) and low sliding angle(<5°) for water, glycerol, and ethylene glycol droplets with different surface tensions, verifying both superhydrophobic and superoleophobic properties. Moreover, the coatings present extremely low surface adhesion force, excellent liquid-driven self-cleaning ability, and hot water repellency. The superamphiphobic POS/Al_(2)O_(3) NPs coating exhibits promising applications in various fields including self-cleaning, corrosion resistance, and preventing scald as this strategy is applicable on various substrates.

关键词： Al_(2)O_(3) Self-cleaning Surface coating Thermal stability Supehydrophobicity Wettability

Effect of Sulfate-reducing Bacteria on Corrosion Behavior of Mild Steel in Sea Mud

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Journal of Materials Science & Technology 2007年第3期23卷 323-328页

作者： Xiaodong ZHAO Jizhou DUAN baorong hou Suru WU Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China College of Chemistry and Chemical Engineering Ocean University of China Qingdao 266003 China

Microbiologically influenced corrosion （MIC） is very severe corrosion for constructions buried under sea mud environment. Therefore it is of great importance to carry out the investigation of the corrosion behavior of marine steel in sea mud. In this paper, the effect of sulfate-reducing bacteria （SRB） on corrosion behavior of mild steel in sea mud was studied by weight loss, dual-compartment cell, electronic probe microanalysis （EPMA）, transmission electron microscopy （TEM） combined with energy dispersive X-ray analysis （EDX） and electrochemical impedance spectroscopy （EIS）. The results showed that corrosion rate and galvanic current were influenced by the metabolic activity of SRB. In the environment of sea mud containing SRB, the original corrosion products, ferric （oxyhydr） oxide, transformed to iron sulfide. With the excess of the dissolved H2S, the composition of the protective layer formed of FeS transformed to FeS2 or other non-stoichiometric polysulphide, which changed the state of the former layer and accelerated the corrosion process.

关键词： Microbiologically influenced corrosion (MIC) Sulfate-reducing bacteria (SRB) Mild steel Sea mud

Double layered superhydrophobic PDMS-Candle soot coating with durable corrosion resistance and thermal-mechanical robustness

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Journal of Materials Science & Technology 2021年第12期71卷 1-11页

作者： Binbin Zhang Jizhou Duan Yanliang Huang baorong hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Nature-inspired superhydrophobic coatings with typical Cassie-Baxter contacts garner numerous interests for multifunctional ***,undesirable poor mechanical and thermal stability are still crucial bottlenecks for real-world *** work introduces a cost-effective,fluorine free and versatile strategy to achieve double-layered PDMS agglutinated candle soot coating with superior water-repellent *** surface morphologies,chemical compositions and wettability behaviors were investigated in *** mechanical stability,chemical stability and durable corrosion resistance of the fabricated PDMS-CS coating were evaluated through friction,calcination and electrochemical impedance *** results demonstrate a remarkably enhanced mechanical robustness and corrosion resistance,indicating PDMS units can act as an effective agglutinating agent between candle soot and underlying *** synergistic effect of PDMS agglutination,porous network nanostructures and extremely low surface energy of incomplete combustion induced candle soot deposition contribute to the eventually robust corrosion resisting coating,which greatly increases the possibility for practical applications.

关键词： Corrosion Coating PDMS Candle soot Robustness Superhydrophobic

Long-term Behavior of Fiber Reinforced Concrete Exposed to Sulfate Solution Cycling in Drying-immersion

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Journal of Wuhan University of Technology(Materials Science) 2017年第4期32卷 875-881页

作者：耿永娟金祖权 hou baorong ZHAO Tiejun GAO Song School of Civil Engineering Qingdao Technological University Qingdao 266033 China Institute of Oceanology The Chinese Academy of Science Qingdao 266071 China

The damage process and corrosion ion distribution in concrete, which was exposed to 60 and 170 drying-immersion cycles of sulfate solution, were systematically investigated. The effects of plain concrete, plain concrete mixed with 4 and 8 kg/m^3 modified PP fiber and high-performance concrete（HPC） mixed with 0.8 kg/m^3 fine PP fiber on the damage process were also studied. The experimental results showed that thenarditeinduced surface scaling, as well as gypsum-and ettringite-induced cracks, were the main degradation forms of concrete under attack of sulfate solution and drying–immersion cycles. The relative dynamic modulus of elasticity of concrete initially increased, then reached stability and finally decreased to failure. The sulfate diffusion coefficients of plain and HPC were 10^（-12） and 10^（-13） m^2/s, respectively. The concentration of sodium ion increased with depth, then maintained stability and finally decreased rapidly with concrete depth. The content of calcium ion on the concrete surface was 110%-150% of that in the interior of specimens. Although fiber worsened the surface scaling of concrete, better resistance capacity of sulfate ion penetration into concrete was observed in plain concrete with 4 kg/m^3 modified PP fiber and HPC.

关键词： fiber reinforced concrete sulfateion damage diffusion coefficient drying-immersion cycles

Hybrid superamphiphobic anti-corrosion coating with integrated functionalities of liquid repellency,self-cleaning,and anti-icing

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Journal of Materials Science & Technology 2024年第17期184卷 256-268页

作者： Binbin Zhang Guang Yang Weichen Xu Jizhou Duan baorong hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China School of Metallurgy Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China

Superhydrophobic materials have shown tremendous potential in various ***,the adhesion,wetting,and pinning of low-surface-tension liquids greatly limit their multifunctional ***,the creation of superamphiphobic coatings that combine superhydrophobic and superoleophobic properties through a simple preparation strategy is *** this study,we successfully developed an organic-inorganic hybrid superamphiphobic coating on Q235 carbon steel using aluminum oxide nanopar-ticles,organosilanes,and waterborne epoxy resin via a versatile spray-coating *** coating ex-hibited high contact angles(>151°)and low sliding angles(<7°)for water and oil liquids,demonstrating excellent superamphiphobic *** tests demonstrated significant improvements in charge transfer resistance and low-frequency modulus for the superamphiphobic *** corro-sion potential shifted positively by 590 mV,and the corrosion current density decreased by four orders of ***,the coating endured 480 h of salt spray and 2400 h of outdoor atmospheric exposure,showcasing superior anti-corrosion *** tests of water droplets at-10°C and-15°C confirmed that the coating significantly prolonged the freezing time with reduced ice adhesion *** believe that the designed superamphiphobic coating with integrated functionalities of selfcleaning,anti-corrosion,anti-icing,and anti-liquid-adhesion can provide important solutions for extending the lifespan of materials in marine and industrial environments.

关键词： Superhydrophobic Superamphiphobic Anti-corrosion Anti-icing Self-cleaning

The corrosion characteristic and mechanism of Mg-5Y-1.5Nd-xZn-0.5Zr(x=0,2,4,6 wt.%)alloys in marine atmospheric environment

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Journal of Magnesium and Alloys 2024年第1期12卷 139-158页

作者： Quantong Jiang Dongzhu Lu Liren Cheng Nazhen Liu baorong hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesNo.7 Nanhai RoadQingdao 266071PR China State Key laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesNo.5625 Renmin StreetChangchun 130022PR China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)No.1 Wenhai RoadQingdao 266071PR China Sanya Institute of Oceanology South China Sea Institute of OceanologyChinese Academy of SciencesZhenzhou RoadSanya 572000PR China

The microstructure and precipitated phases of as-cast Mg-5Y-1.5Nd-x Zn-0.5Zr(x=0,2,4,6 wt.%)alloys were investigated by optical microscopy,scanning electron microscopy,energy-dispersive spectrometry and X-ray *** exposure corrosion experiment of these magnesium alloys was tested in South China Sea and KEXUE vessel atmospheric *** corrosion characteristic and mechanism of magnesium alloys of Mg-5Y-1.5Nd-x Zn-0.5Zr(x=0,2,4,6 wt.%)alloys were analyzed by weight loss rate,corrosion depth,corrosion products and corrosion *** electrochemical corrosion tests were also measured in the natural *** comprehensive results showed that Mg-5Y-1.5Nd-4Zn-0.5Zr magnesium alloy existed the best corrosion resistance whether in the marine atmospheric environment and natural seawater *** depended on the microstructure,type and distribution of precipitated phases in Mg-5Y-1.5Nd-4Zn-0.5Zr magnesium *** quantity anodic precipitated phases in the microstructure of Mg-5Y-1.5Nd-4Zn-0.5Zr alloy played the key role in the corrosion resistance.

关键词： Marine atmospheric environment Exposure corrosion Magnesium alloy Corrosion rate Corrosion mechanism

Electrochemical, quantum chemical and SEM investigation of the inhibiting effect and mechanism of ciprofloxacin, norfloxacin and ofloxacin on the corrosion for mild steel in hydrochloric acid

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Science China Chemistry 2008年第10期51卷 928-936页

作者： PANG XueHui GUO WenJuan LI WeiHua XIE JianDong hou baorong School of Chemistry and Chemical Engineering University of JinanJinan 250022China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China Institute of Design and Research of Shandong Jianzhu University Jinan 250013China

The inhibiting effect and mechanism of 1-cyclopropyl-6-fluoro-1,4-dihydro -4-oxo-7-(1-piperazinyl) -3- quinoline carboxylicacid(ciprofloxacin), 1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinoline carboxylic acid (norfloxacin) and (?)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7- oxo-7 H-pyrido(1,2,3-de)-1,4- benzoxazine-6 carboxylic acid (ofloxacin) on the corrosion of mild steel in 1 mol/L HCl have been studied using electrochemical method, quantum chemical method and SEM at 303 K. The potentiodynamic results showed that these compounds suppressed both cathodic and an-odic processes of mild steel corrosion in 1 mol/L HCl. The impedance spectroscopy showed that Rp values increased, and Cdl values decreased with the rising of the working concentration. Quantum chemical calculation showed that there was a positive correlation between some inhibitors structure properties and the inhibitory efficiency. The inhibitors function through adsorption followed Langmuir isotherm, and chemisorption made more contribution to the adsorption of the inhibitors on the steel surface compared with physical adsorption. SEM analysis suggested that the metal had been protected from aggressive corrosion because of the addition of the inhibitors.

关键词： inhibition mild steel polarization electrochemical impedance spectroscopy SEM

Corrosion inhibition and mechanism of mild steel in hydrochloric acid by ceftriaxone and amoxicillin

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Science China Chemistry 2011年第9期54卷 1529-1536页

作者： PANG XueHui GONG Min ZHANG YuXuan WEI Qin hou baorong Institute of Oceanology Chinese Academy of sciences Qingdao 266071 China College of Materials and Chemical Engineering Sichuan University of Science & Engineering Zigong 643000 China School of Chemistry and Engineering University of Jinan Jinan 250022 China

Corrosion inhibition of mild steel in 1 mol/L HC1 by amoxicillin and ceftriaxone in the concentration range of 1.00×10^-5-1.00×10^-2 mol/L has been studied using weight loss, electrochemical potentiodynamic polarization, electrochemical impedance spectroscopy （EIS）, scanning electron microscopy （SEM） and quantum chemistry tests at 298 K. The weight loss experiment showed that the inhibition efficiency increased with amoxicillin and ceftriaxone concentrations to attain the maximums of 80.3% and 94.1%, respectively at 1.00×10^-2 mol/L. Potentiodynamic polarization indicated that amoxicillin and ceftriaxone acted as mixed-type inhibitors but mainly inhibited cathode hydrogen evolution reaction for mild steel in 1 mol/L HC1. The electrochemical impedance spectroscopy （EIS） demonstrated the inhibitors covered the active points of metal surface to inhibit corrosion. The absorption of both inhibitors on the mild steel surface was found to follow Langmuir adsorption isothermal and dominantly involve chemical adsorption at 298 K. Scanning electron microscopy （SEM） confirmed both of the inhibitors played a significant protective effect in mild steel corrosion in 1 mol/L HC1. The relationship between the inhibition properties and molecular structure had been discussed by quantum chemistry calculation. All the experimental results concluded that both amoxicillin and ceftriaxone acted as good corrosion inhibitors and their inhibition efficiency was in the order of ceftriaxone 〉 amoxicillin.

关键词： corrosion mild steel acid weight loss potentiodynamic polarization curve EIS SEM quantum chemistry

The corrosion behavior and mechanical property of the Mg-7Y-x Nd ternary alloys

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Journal of Magnesium and Alloys 2018年第4期6卷 346-355页

作者： Quantong Jiang Xianzi Lv Dongzhu Lu Jie Zhang baorong hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesNo.7 Nanhai RoadQingdao 266071China Open Studio for Marine Corrosion and Protection Pilot Qingdao National Laboratory for Marine Science and TechnologyNo.1 Wenhai RoadQingdao266235China

The corrosion behavior and mechanical property of Mg-7Y-x Nd(x=0.5,1.0,1.5 wt%)alloys were *** microstructure and precipitations of Mg-7Y-x Nd alloys were studied by scanning electron microscopy,energy-dispersive spectrometry and X-ray *** quantities of the Mg_(12)(Y,Nd)phase increased,whereas that of the Mg_(24)(Y,Nd)_(5)phase decreased with increasing *** weight loss rate decreased from 17.5020 mg cm^(-2)·d^(-1)(36.7542 mm y^(-1))to 9.3744 mg cm^(-2)·d^(-1)(19.6862 mm y^(-1)).The electrochemical measurement also demonstrated the similar *** loss in mechanical properties after corrosion reaction followed the order Mg-7Y-0.5Nd>Mg-7Y-1.0Nd>*** precipitations played dual roles in the corrosion resistance that depended on type and distribution.

关键词： Mg-Y-Nd alloy Microstructure Corrosion Mechanical property