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INFLUENCE OF APPLIED POTENTIAL AND LOADING WAVEFORM ON FATIGUE CRACK GROWTH FOR STEEL A537 IN 3.5% NaCl SOLUTION

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Acta Metallurgica sinica(English Letters) 1993年第12期6卷 459-464页

作者： LI Jin wang Zengfu KE Wei corrosion Science Laboratory,institute of corrosion and protection of metals,academia sinica,shenyang,china institute of corrosion and protection of metals,academia sinica,shenyang 110015,china Inst of corrosion and protection of Metals Shenyang China

Influence of applied potentials and loading waveform on the fatigue crack growth for steel A537 in 3.5% NaCl solution,and corresponding straining electrode behaviour have been *** the applied potentials over or below -800mV(SCE),the anodic dissolution or the hydrogen embrittlement is predominatant,*** applied anodic potential,the acceleration effect of continuous loading pattern on the CF crack growth mainly appeared at the range of low ΔK values,while for cathodic potential,it appeared at the high ΔK *** continuous straining causes a decrease of natural potential and an increase of anodic dissolution current.

关键词： corrosion fatigue steel A537 waveform potential straining eleclrode

INFLUENCE OF DEFECTS ON PROPERTIES OF SPUTTERED CoCrAIY COATINGS

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Acta Metallurgica sinica(English Letters) 1993年第8期6卷 141-146页

作者： wang fuhui lou hanyi wu weitao corrosion Science Laboratory,institute of corrosion and protection of metals,academia sinica,shenyang,china research assistant,institute of corrosion and protection of Metats,academia sinica,shenyang 110015,china

The influence of defects on the oxidation, hot corrosion and thermal shock properties of sputtered Co-30Cr-6Al-0.5Y coatings was *** results indicated that the nodular defects reduced the properties of the *** the oxidation,the nodular defects resulted in the severe internal oxidation of aluminium,as a result,the pure alu mina scale could not form at very high temperature such as at 1 100℃.For the hot corrosion,the nodular defects served as the short-path for the diffusion of sulfur into the coating and the substrate,and caused the sulfidation,of the ***,the nodular defects became the crack source during the thermal shock test and decreased the thermal shock resistance.

关键词： CoCrAlY coating defect oxidation hot corrosion thermal shock

EFFECT OF CoCrAl COATING ON OXIDATION RESISTANCE OF INTERMETALLIC COMPOUND TiA1

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Acta Metallurgica sinica(English Letters) 1993年第11期6卷 331-336页

作者： wang fuhui lou hanyi wu weitao corrosion Science Laboratory,institute of corrosion and protection of metals,academia sinica,shenyang,china associate professor,institute of corrosion and protection of metals,academia sinica,shenyang 110015,china

Effect of a sputtered Co-30Cr-5Al microcrystalline coating on oxidation resistance of intermetallic compound TiAl and oxidation behavior of the bare TiAl were investigated at 900—1000℃ in static *** oxidation kinetics for the TiAl alloy seems to approximately follow a linear rate *** oxidation resistance of TiAl is due to the formation of the mixed Al_2O_3+TiO_2 scale which is loosely packed and easily spalled *** not of dense and adherent pure Al_2O_3.A sputtered Co-30Cr-5Al coating,30 μm thickness,can remarkably improve the oxidation resistance of TiAl owing to the formation of adherent Al_2O_3 protective ***,many Kirkendall voids were formed between coating and substrate.

关键词： CoCrAl microcrystalline coating TiAL oxidation void

CYCLIC OXIDATION BEHAVIOUR OF MICROCRYSTALLIZED CoCrAl COATING

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Acta Metallurgica sinica(English Letters) 1992年第9期5卷 173-177页

作者： wang fuhui lou hanyi wu weitao corrosion Science Laboratory,institute of corrosion and protection of metals,academia sinica,shenyang,china Research Assistant,institute of corrosion and protection of metals,academia sinica,shenyang 110015,china

An investigation was carried out of the resistance to cyclic oxidation of the as-cast normal-grained Co-30Cr-5Al alloy substrate at 1000℃ in air together with its sputtered coating of microcrystallized CoCrAl alloy grains sized less than 0.5μ*** emissi on counts showed that the initially formed Al_2O_3 scale on the bare alloy substrate cracked and spalled severely off after only one or two cycles on cooling and then the worse protective layer of Cr_2O_3 and CoCr_2O_4 spinel occurred on *** such substrate coated with sputtered microcrystallized CoCrAl alloy film was not damaged under oxidation even through 100 cycles at 1000℃.In comparison with the normal-grained alloy,the microcrystallized al- loy,coating of similar constitution exhibite excellent resistance to oxide spalling on surface.

关键词： microcrystallized CoCrAl coating cyclic oxidation sputtering

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 wang State Key Laboratory for corrosion and protection, institute of Metal Research, Chinese Academy of Sciences, shenyang 110015, china State Key Laboratory for corrosion 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

INFLUENCE OF PHASE COMPOSITION ON PITTING corrosion RESISTANCE OF SPUTTERED COATING OF 1Cr18Ni9Ti STAINLESS STEEL

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Acta Metallurgica sinica(English Letters) 1990年第8期3卷 77-80页

作者： LIU Dacheng wang fuhui CAO Chunan lou hanyi institute of corrosion and protection of metals,academia sinica,shenyang,china wang fuhui,Laboratory of Electrochemistry,institute of corrosion and protection of metals,academia sinica,shenyang 110015,china

A series of single bcc,bcc plus fcc duplex and single fcc microcrystalline coatings of 1Cr18Ni9Ti stainless steel were prepared by using sputtering *** resistance against pitting corrosion was studied by measurements of pitting corrosion potentials and electrochemical noise during initiation of corrosion *** results show that the sputtered coatings with single bcc phase or single fcc structure are more resistant to pitting corrosion than those with bcc plus fcc duplex phase structure.

关键词： 1Cr18Ni9Ti stainless steel phase composition microcrystalline coating pitting corrosion

PROPERTIES OF YTTRALUMINIZING COATING ON Ni-BASE SUPERALLOYS

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Acta Metallurgica sinica(English Letters) 1990年第11期3卷 316-319页

作者： wang fuhui LO U hanyi BAI Linxiang institute of corrosion and protection of metals,academia sinica,shenyang,china wang fuhui,institute of corrosion and protection of metals,academia sinica,shenyang 110015,china

The yttraluminizing coating on the Ni-base superalloys has been developed by dipping the specimens in a specially made yttrium-containing slurry as an underlayer and over spraying a Cr-Al slurry as a protective layer,then heating to 1060℃ and holding for 1 h under argon *** by EPMA showed that the yttrium was concentrated in the intermediate zone of the coating as metallic compound *** exposure to air up to 1000℃,the oxidation test revealed that the anti-oxidation resistance of the yttraluminizing coating with post-aluminizing is much superior to that with single aluminizing only.

关键词： yttraluminizing coating Ni-base superalloy antioxidation resistance oxidation test

Oxidation Behaviour of Laser Remelted Cr-containing Steels

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Journal of Materials Science & Technology 1993年第4期9卷 258-262页

作者： Guanyan FU weitao wu Maocai wang shenglong zhu corrosion science Lab,institute of corrosion and protection of metals,academia sinica,shenyang 110015,china

Laser surface remelting of steels with different Cr contents has been performed by using a CO_2 laser. The results of oxidation tests showed that the effects of laser remelting on the oxidation resistance of Cr-containing steels have close relation to the Cr contents and microstructures of the steels. The re- sistance to high temperature oxidation of 18-8 and HK40 at 1273 K can be obviously improved by laser remelting, whereas laser remelting showed little effect on the oxidation resistance of Fe-6Cr and Cr30 at 1173-1273 K.

关键词： laser remelting oxidation Cr-containing steel

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 fuhui 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