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Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 119-126页

作者： Xiaoxue Wang Lulu Jin Jinke Wang Rongqiao Wang Xiuchun Liu Kai Gao Jingli Sun Yong Yuan Lingwei Ma Hongchang Qian Dawei Zhang School of Energy and Power Engineering Beihang UniversityBeijing 100191China Beijing Institute of Space Long March Vehicle Beijing 100076China National Materials corrosion and protection Data center University of Science and Technology BeijingBeijing 100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China Shanghai Spaceflight Precision Machinery Institute Shanghai 201600China

The atmospheric corrosion monitoring(ACM)technique has been widely employed to track the real-time corrosion behavior of metal ***,limited studies have applied ACM to the corrosion protection properties of organic *** study compared a bare epoxy coating with one containing zinc phosphate corrosion inhibitors,both applied on ACM sensors,to observe their corrosion protection properties over *** with artificial damage via scratches were exposed to immersion and alternating dry and wet environments,which allowed for monitoring galvanic corrosion currents in *** the corrosion tests,the ACM currents of the zinc phosphate/epoxy coating were considerably lower than those of the blank epoxy *** trend in ACM current variations closely matched the results obtained from regular electrochemical tests and surface *** alignment highlights the potential of the ACM technique in evaluating the corrosion protection capabilities of organic *** with the blank epoxy coating,the zinc phosphate/epoxy coating showed much-decreased ACM current values that confirmed the effective inhibition of zinc phosphate against steel corrosion beneath the damaged coating.

关键词： atmospheric corrosion monitoring technology corrosion inhibitor coating carbon steel corrosion protection

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Effects of Carbon Content and Microstructure on corrosion Property of New Developed Steels in Acidic Salt Solutions

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Acta Metallurgica Sinica(English Letters) 2014年第1期27卷 115-123页

作者： Feilong Sun Xiaogang Li Xuequn Cheng corrosion and protection center University of Science and Technology Beijing Key Laboratory of corrosion and protection(Ministry of Education)

New steels with different carbon contents were self-developed by thermo-mechanical controlled processing. The effects of the carbon content and the microstructure on the corrosion properties of new steels were investigated by immersion test and SEM. The results indicated that the ferrite phase （both the proeutectoid and eutectoid ferrite） dissolved preferentially. Cementite reserved and accumulated on the surface. As carbon content increased, the content of ferrite decreased and cathode/anode area ratio increased. Therefore, the corrosion rate of new steels increased from 0.30 to 0.90 mm/years when the carbon content rose from 0.05 to 0.13 wt%. The corrosion process of new steels was studied using electrochemical impedance spectroscopy experiments during 72 h. It indicated that the impedance modulus *** nz of the new steels reduces with the increase of the immersion time. While the corrosion process of the new steel with 0.11 wt% C developed faster than that with 0.07 wt% C, although their *** nz was similar at the initial stage.

关键词： Carbon content Microstructure corrosion behavior Electrochemical impedance spectroscopy SEM

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Mechanical properties and potential applications of magnesium alloys

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中国有色金属学会会刊：英文版 2003年第6期13卷 1253-1259页

作者： I.M.Baghni 吴荫顺李久青杜翠薇张巍 Mechanical Engineering Department corrosion and protection center

Magnesium alloys, having high specific strength, with a density only 2/3 of that of aluminum and 1/4 of carbon steels, have become ideal materials for low mass applications such as automobiles and electronic devices. It was dealt with the state of the art in developing cost effective, low mass, high ductility and high creep resistance magnesium alloys that are suitable for structures and power train applications.

关键词：镁合金机械性能应用前景蠕变汽车

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Crystallization behavior of plasma-sprayed lanthanide magnesium hexaaluminate coatings

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International Journal of Minerals,Metallurgy and Materials 2014年第12期21卷 1247-1253页

作者： Liang-liang Huang Hui-min Meng Jing Tang corrosion and protection center University of Science and Technology Beijing

LaMgAl11O19 thermal barrier coatings （TBCs） were prepared by atmospheric plasma spraying. The crystallization behavior of the coatings and the synthesis mechanism of LaMgAl11O19 powders were researched. The results showed that the plasma-sprayed coatings conmined some amorphous phase, and LaMgAl11O19 powders were partially decomposed into Al2O3, LaAlO3, and MgAl2O4 in the plasma spraying process. The amorphous phase was reerystallized at a temperature of approximately 1174.9℃, at which level the decomposed Al2O3, LaAl2O3, and MgAl2O4 reacted again. The resynthesis temperature of LaMgAl11O19 in the plasma-sprayed coatings was lower than that of LaMgAl11O19 in the original raw powders. The synthesis mechanism of LaMgAl11O19 powders can be summarized as follows： during the first part of the overall reaction, La2O3 reacts with Al2O3 to form LaAl2O3 at approximately 900℃, and then LaAl2O3 further reacts with Al2O3 and MgAl2O4 to produce LaMgAl11O19 at approximately 1200℃.

关键词： thermal barrier coatings hexaaluminates plasma spraying crystallization

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Effects of Applied Magnetic Field on corrosion of Beryllium Copper in NaCl Solution

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Journal of Materials Science & Technology 2010年第4期26卷 355-361页

作者： Jing Hu, Chaofang Dong, Xiaogang Li and Kui Xiao corrosion & protection center, University of Science and Technology Beijing, Key Laboratory for corrosion and protection of Ministry of Education, Beijing 100083, China [a] corrosion & protection center University of Science and Technology Beijing Key Laboratory for corrosion and protection of Ministry of Education Beijing 100083 China

The effects of an applied magnetic field on the corrosion process of beryllium copper in NaCl solution have been investigated by electrochemical measurements, scanning electron microscopy （SEM） and energy dispersive spectroscopy （EDS）. The results showed that a horizontal magnetic field with 0.4 T barely shifted the open circuit potentials （Ecorr） of beryllium copper in NaCl solution with different concentrations. However, the horizontal magnetic field increased the limiting current density of beryllium copper in NaCl solution with low concentration, while decreased the limiting current density of beryllium copper in NaCl solution with high concentration. It was found that magnetic field accelerated the diffusion of CuCl2- away from the electrode surface and delayed the formation of Cu2O. The results of SEM and EDS showed that the inffuence of magnetic field over the elements distribution of the corrosion products differed from the different concentration of the immersion solution.

关键词： Beryllium copper Magnetic field corrosion

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Characterization and Comparison of Conducting Polyaniline Synthesized by Three Different Pathways

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Journal of Wuhan University of Technology(Materials Science) 2011年第6期26卷 1068-1072页

作者：董超芳 corrosion & protection center University of Science and Technology Beijing Key Laboratory for corrosion and protection of Ministry of Education

The conducting polyaniline （PANI） prepared by three chemical oxidative polymerization pathways including microemulsion, emulsion and aqueous solution methods were studied and compared. Their structures, morphologies and properties were characterized using FT-IR, XRD, TEM and TGA. PANI particles formed in aqueous solution have a smallest size and doping HCl enables to increase their conductivity. In contrast, PANI particles prepared by emulsion method have the highest thermal stability and conductivity and more ordered morphology. Rather different from these two methods, microemulsion approach allows forming nanocomposite PANI with tube-like nanostructure.

关键词： nano materials polymers polyaniline

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Preparation and characterization of a chitosan-based low-pH-sensitive intelligent corrosion inhibitor

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International Journal of Minerals,Metallurgy and Materials 2015年第9期22卷 998-1004页

作者： Yu-ning Wang Chao-fang Dong Da-wei Zhang Pan-pan Ren Li Li Xiao-gang Li corrosion and protection center Key Laboratory for Corrosion and Protection (MOE) University of Science and Technology Beijing Baic Motor Corporation Ltd.

A chitosan （CS）-based low-pH-sensitive intelligent corrosion inhibitor was prepared by loading a pH-sensitive hydrogel with benzotriazole （BTA）; the pH-sensitive hydrogel was synthetized by crosslinking CS with glutaraldehyde （GTA）. Analysis by Fou- tier-transform inflared （FT-IR） spectroscopy showed that Schiff reactions occurred between amino and aldehyde groups. The swelling abil- ity of the hydrogel was investigated using a mass method, and it was observed to swell more in an acidic environment than in an alkaline en- vironment. The hydrogel＇s loading capacity of BTA was approximately 0.377 g·g ^-1, and its release speed was faster in an acidic environment than in an alkaline environment because of its swelling behavior. The corrosion inhibition ability of the intelligent inhibitor was tested by immersion and electrochemical methods. The results showed that after 4 h of immersion, the polarization resistance （Rp） value of copper with the intelligent inhibitor was approximately twice of that of copper with BTA, indicating that the intelligent inhibitor could effectively prevent copper from corroding.

关键词： corrosion inhibitors chitosan hydrogels swelling corrosion inhibition copper corrosion

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A New Understanding of Stress corrosion Cracking Mechanism of X80 Pipeline Steel at Passive Potential in High-pH Solutions

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Acta Metallurgica Sinica(English Letters) 2015年第7期28卷 866-875页

作者： Lin Fan Zhi-Yong Liu Wei-Min Guo Jian Hou Cui-Wei Du Xiao-Gang Li corrosion and protection center University of Science and Technology Beijing State Key Laboratory for Marine corrosion and protection Luoyang Ship Material Research Institute

Susceptibilities to stress corrosion cracking（SCC） of X80 pipeline steel in relatively concentrated carbonate/bicarbonate solutions with different chloride ion concentrations or p H value at a passive potential of-200 m V vs SCE were investigated by slow strain rate tensile *** order to explore the SCC mechanism and the evaluation criterion for the SCC susceptibility of the steel in passive state,electrochemical measurements were *** polarization curves were obtained at different potential sweep rates,and electrochemical impedance spectroscopy measurements were taken after fast polarization to the passive *** effects of chloride ion and p H on SCC behaviors of X80 steel at the passive potential were also *** results showed that the SCC mechanism of X80 pipeline steel was greatly influenced by the passive film formed in these *** SCC behaviors followed the film suppressed anodic dissolution mechanism in these circumstances,because the filming process accounted for a considerable proportion of the overall electrode *** criteria for evaluating the SCC susceptibility of the steel at passive potential were proposed and *** in the concentration of chloride ion or increasing in p H value resulted in the reduction in SCC *** existence of chloride ion greatly lowered the passivation tendency and the film stability,while its concentration determined the dissolution rate of the steel *** p H value was responsible for the stable and tenacious passive films and the high repassivation *** was also inclined to lower the anodic dissolution rate at crack tips by retarding the cathodic oxygen reduction.

关键词： Pipeline steel Stress corrosion cracking (SCC) Passivation Chloride ion pH value

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Influence factors on stress corrosion cracking of P 110 tubing steel under CO2 injection well annulus environment

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Journal of Central South University 2016年第4期23卷 757-764页

作者：刘智勇赵天亮刘然克贾静焕杜翠薇李晓刚 corrosion and protection center University of Science and Technology Beijing Key Laboratory of corrosion and Prevention of Ministry of Education

Stress corrosion cracking （SCC） behavior of P 110 tubing steel in simulated C02 injection well annulus environments was investigated through three-point bent tests, potentiodynamic polarization and EIS measurements. The results demonstrate that SCC of P110 tubing steel could occur in acidulous simulated environment, and the sensitivity of SCC increases with the decrease ofpH, as well as increase of sulfide concentration and total environmental pressure. Both anodic dissolution and hydrogen embrittlement make contributions to the SCC. Adequate concentration of corrosion inhibitor can inhibit the occurrence of SCC on account of the inhibition of localized anodic dissolution and cathodic hydrogen evolution.

关键词： P110 tubing steel stress corrosion cracking annulus environment C02 flooding

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Effect of Temperature and Cl^- Concentration on Pitting of 2205 Duplex Stainless Steel

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Journal of Wuhan University of Technology(Materials Science) 2011年第4期26卷 641-647页

作者：董超芳 corrosion and protection center University of Science and Technology Beijing

The electrochemical behaviors of 2205 duplex stainless steel in NaCl solution with different temperatures and concentrations were studied by gravimetric tests, potentiodynamic polarization, electrochemical impedance spectroscopy and scanning electron microscopy. The experinental results show that temperature and chloride concentration have a great influence on the pitting resistance of 2205 duplex stainless steels. They not only effect the corrosion rate of pitting, but also change the shape of the pits. When NaCl solution was in low concentration and temperature below the critical pitting temperature, pits were very small and scattered with hemisphere-like shape. On the contrary, the pits of 2205 duplex stainless steel were large and sometimes had a lacy cover when the NaCl concentration was higher and the temperature was 70℃.

关键词： 2205 duplex stainless steel pitting temperature chloride

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