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In Situ Scanning-Tunneling-Microscope Observation on Dissolution of a Cu-2.Zr Film

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Journal of Materials Science & Technology 2005年第3期21卷 311-314页

作者： Haibo LU, Guoze MENG, ying li and {2. wang state key Laboratory for corrosion & protection, institute of metal research, chinese academy of sciences, shenyang 110016, china Laboratory for corrosion and protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A nanocrystalline coating of Cu-2.Zr (in wt pct) was obtained on glass by magnetron sputtering. The corrosion behavior of the Cu-2.Zr film in 0.001 mol/L HCI solution was investigated using potentiodynamic polarization and in situ electrochemical scanning-tunneling-microscopy (ECSTM). Results demonstrated that the film exhibits active behavior. Microscopic pitting corrosion and tunneling are caused by localized electrodissolution of Zr atoms and the diffusion of Cu atoms at surface defects.

关键词： Magnetron sputtering Film Potentiodynamic polarization ECSTM

metals Supported Water Monomers:the Bonding Nature Revisited

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Journal of Materials Science & Technology 2010年第2期26卷 97-105页

作者： Jibiao li, Shenglong Zhu and fuhui {2. state key Laboratory for corrosion and protection, institute of metal research, chinese academy of sciences, shenyang 110015, china state key Laboratory for {2. and protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

A single water monomer is known as a hard-to-observe molecule even in the presence of metal surfaces as supporting matrix. This review highlights effort in experimental characterizations and theoretical modeling of transition metals supported water monomers with attention given to its structure and bonding, together with the insights that we have provided into the bonding nature of the water-interactions by the newly employed projected PDOS （partial density of states） difference analysis, which is proved to be an effective tool to be elucidate such bonding nature. The general s-d hybridization and d-shell effect are summarized, and how these effects can be tuned by tailoring local surface configurations is discussed.

关键词： Water monomer Adsorption Surface bonding Transition metals

Effect of Sputtered TiAlCr Coatings on Oxidation and Hot corrosion Resistance of Ti-2.Al-14Nb-3V

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Journal of Materials Science & Technology 2001年第5期17卷 501-506页

作者： fuhui wang, Chunhong GUAN, Zhao{2.n TANG and Weitao WU state key Laboratory for corrosion and protection, institute of metal research, The chinese academy of sciences, shenyang 110016, china Lab. for corrosion and protection Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

The effect of sputtered Ti-50Al-10Cr and Ti-50A1-2.Cr coatings on both isothermal and cyclic oxidation resistance at 800-900℃ and hot corrosion resistance at 850℃ of Ti-2.Al-14Nb-3V was investigated. Results indicated that Ti-2.Al-14Nb-3V alloys exhibited poor oxidation resistance due to the formation of Al2.3+TiO2.AlNbO4 mixed scales in air at 800-900℃ and poor hot corrosion resistance due to the spoliation of scales formed in Na2.O4+K2.O4 melts at 850℃. Both Ti-50Al-10Cr and Ti-50Al-2.Cr coatings remarkably improved the oxidation and hot corrosion resistance of Ti-2.Al-14Nb-3V alloy.

关键词： Ti Cr Effect of Sputtered TiAlCr Coatings on Oxidation and Hot corrosion Resistance of Ti-2.Al-14Nb-3V Al

Investigation of the corrosion and Passive Behavior of HP-13Cr Stainless Steel in Formate Annulus protection Fluid

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Acta metallurgica Sinica(English Letters) 2024年第6期37卷 1087-1103页

作者： Jidong wang Tengfei Yin Wenlong Qi Xuanpeng li Yang Zhao Tao Zhang {2. wang shenyang National Laboratory for Materials Science Northeastern UniversityShenyang110819China state key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials Tubular Goods Research InstituteCNPCXi’an710077China

The corrosion and passive behavior of HP-13Cr stainless steel(HP-13Cr SS)in formate annulus protection fluid was ***-13Cr SS exhibited good passive behavior in clean formate annulus protection fluid,which was attributed to a thinner and more dense passive film mainly composed of Cr_(2.O_(3).In the formation water solution,the passive film was composed of metastable Cr(OH)3,which was explained by the isoelectric point theory,resulting in the deterioration of the passive behavior of HP-13Cr *** the formation water penetrated the formate annulus protection fluid,a large number of loose FeCO_(3)particles formed in the corrosion scales,thus HP-13Cr SS suffered severe ***,avoiding formation water penetrating the formate annulus protection fluid is conducive to improving the service life of HP-13Cr SS oil tubes in extremely aggressive environment.

关键词： HP-13Cr SS Passive behavior Formate annulus protection fluid Isoelectric point

Photocatalytic Property of TiO2.Films Deposited by Pulsed DC Magnetron Sputtering

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Journal of Materials Science & Technology 2004年第1期20卷 31-34页

作者： Wenjie ZHANG, Shenglong ZHU, ying li and {2. wangstate key Laboratory for corrosion and protection, institute of metal research, chinese academy of sciences, shenyang 110016, china chinese Acad Sci Inst Met Res State Key Lab Corros & Protect Shenyang 110016 Peoples R China

TiO2.thin films were prepared by DC magnetron sputtering with the oxygen flow rate higher than the threshold. The film deposited for 5 h was of anatase phase with a preferred orientation along the 2.0> direction, but the films deposited for 2.and 3 h were amorphous. The transmittance and photocatalytic activity of the TiO2.films increased constantly with increasing film thickness. When the annealing temperature was lower than 700℃, only anatase grew in the TiO2.film. TiO2.phase changed from anatase to rutile when the annealing temperature was above 800℃. The photocatalytic activity decreased with increasing annealing temperature.

关键词： TiO2.film Photocatalytic activity DC magnetron sputtering Film characteristic

Electrically conductive nanowires controlled one pivotal route in energy harvest and microbial corrosion via direct metal-microbe electron transfer

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Journal of Materials Science & Technology 2024年第7期174卷 226-233页

作者： Yuting Jin Jiaqi li Toshiyuki Ueki Borui Zheng Yongqiang Fan Chuntian Yang Zhong li Di {2. Dake Xu Tingyue Gu fuhui {2. shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China Department of Chemical and Biomolecular Engineering Institute for Corrosion and Multiphase TechnologyOhio UniversityAthensOH 45701USA

Extracellular electron transfer(EET)plays a critical role in bioelectrochemical processes,allowing cou-pling between microorganisms and extracellular solid-{2. electrodes,metals,or other cells in energy *** studies have suggested a role for outer-surface c-type cytochromes in direct metal-to-microbe electron transfer by Geobacter sulfurreducens,a model electroactive ***,we ex-amined the possibility of other microbially produced electrical contacts by deleting the gene for PilA,the protein monomer that *** assembles into electrically conductive protein nanowires(e-pili).Deleting pilA gene inhibited electron extraction from pure iron and 316L stainless steel up to 31%and 81%,respectively more than deleting the gene for the outer-surface cytochrome *** PilA-deficient phenotype,and the observation that relatively thick biofilms(2..7μm)grew on the metal surfaces at multi-cell distances from the metal surfaces suggest that e-pili contributed significantly to microbial cor-rosion via direct metal-to-microbe electron *** results have implications for the fundamental understanding of electron harvest via e-pili by electroactive microbes,their uses in bioenergy production,as well as in monitoring and mitigation of metal biocorrosion.

关键词： Electrically conductive protein nanowires Direct metal-to-microbe electron transfer Geobacter sulfurreducens Outer-surface c-type cytochromes Biofilm

Transient Current Behaviour for Iron in 3.5%NaCl and 3.5%NaCl+ 1%NaNO_2.Solutions during corrosion Fatigue

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Journal of Materials Science & Technology 1996年第4期12卷 291-298页

作者： Zhengfu wang Xuejun WEI Jin li and Wei KE({2. key Lab. for corrosion and protection, institute of corrosion and protection of metals,chinese academy of {12., shenyang 110015, china) state key Lab. for {2. and protection Institute of Corrosion and Protection of Metals Chinese Academy of Sciences Shenyang 110015 China

The transient current behaviour for Iron in 3.5%NaCl and 3.5%NaCl +1%NaNO2.solutions during corrosion fatigue (CF) process has been investigated at different given strain amplitudes and strain rates. The results show that elastic strain has little contribution to material dissolution. The elastic tension strain results in the decrease in the transient current, while the elastic compression strain increases the transient current. Compared to the elastic deformation, plastic deformation affects material dissolution evidently For iron in 3.5%NaCl solution, the strain amplitude plays a dominant role in the dissolution process accelerated by the plastic strain, while in 3.5%NaCl+1%NaNO2.solution, both the strain amplitude and strain rate play an important role in this process. In this paper, the effect of the elastic deformation on the material dissolution and the relation between the tension and compression current peak values under the plastic cycle deformation are discussed

关键词： Transient Current Behaviour for Iron in 3.5%NaCl and 3.5%NaCl SCE NaNO2.Solutions during corrosion Fatigue

Preparation and corrosion Resistance of Magnesium Coatings by Magnetron Sputtering Deposition

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Journal of Materials Science & Technology 2003年第5期19卷 459-462页

作者： Hongwei HUO, ying li and {2. wangstate key Laboratory for corrosion and protection, institute of metal research, chinese academy of sciences, shenyang 110016, china state key Laboratory for {2. and protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Magnesium coatings were fabricated on stainless steel substrates (1Cr11Ni2.2.oV) by a plane magnetron sputtering technique. The argon pressure and the substrate condition (including temperature and the substrate was rotated or fixed) were varied in order to evaluate the influence of the parameters on the crystal orientation and morphology of the coating. The corrosion behavior of the coatings in 1 wt pct NaCI solution was studied by electrochemical methods. The results showed that all coatings exhibited preferred orientation (002. as the argon pressure increased from 0.2.to 0.4 Pa. The morphologies of the coatings varied with the argon pressure and with whether the substrate was rotated or fixed. The open circuit potential of the coatings was more positive than that of cast AZ91D magnesium alloy. However, the immersion test in 1 wt pct NaCI solution showed that the corrosion rates of the coatings were higher than that of cast AZ91D magnesium alloy.

关键词： Magnesium coating corrosion Magnetron sputtering deposition

Study on blister of the coating on solid cantilevers of hydraulic supports for coal mining

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Science china(Technological sciences) 2010年第12期53卷 3183-3188页

作者： MENG GuoZhe1, FU Jinliang2. SUN FeiLong1, SHAO YaWei1, ZHANG Tao1 & wang {2.1, 3 1 corrosion and protection Laboratory, key Laboratory of Superlight Materials and Surface Technology (Harbin Engineering University), Ministry of Education, Harbin 150001, china 2.Technology Center of Zhengzhou Coal Mining Machinery Group Co. Ltd., Zhengzhou 100049, china 3 state key Laboratory for corrosion and protection, institute of metal research, chinese academy of sciences, shenyang 110016, china corrosion and protection Laboratory Key Laboratory of Superlight Materials and Surface Technology (Harbin Engineering University) Ministry of Education Harbin China Technology Center of Zhengzhou Coal Mining Machinery Group Co. Ltd. Zhengzhou China state key Laboratory for {2. and protection Institute of Metal Research Chinese Academy of Sciences Shenyang China

In this work, blister of the Cu-Sn plus Cr coating on solid cantilevers of hydraulic supports for coal mining was investigated by hydrogen-charging, Devanathan-Stachurski method and electrochemical impedance spectroscopy (EIS) measurement. It was found that the permeation hydrogen during the pickling process and the electroplating process was responsible for the blisters. The residual tensile stress due to the machining process would increase the permeation hydrogen amount during pickling and electroplating processes.

关键词： hydrogen blister hydrogen permeation EIS sub-surface hydrogen concentration