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Recently deepened insights regarding Mg corrosion and advanced engineering applications of Mg alloys

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Journal of Magnesium and Alloys 2023年第11期11卷 3948-3991页

作者： guang-Ling song Andrej Atrens Department of Ocean Science and Engineering Southern University of Science and Technology1088 Xueyuan BoulevardShenzhen 518055China The University of Queensland School of Mechanical and Mining EngineeringCentre for Advanced Materials Processing and Manufacturing(AMPAM)St LuciaQld 4072 Australia State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University422 S.Siming RdXiamen 361005China

This review summarizes recent insights into the Mg corrosion mechanism, clarifies many critical controversial points regarding the Mg corrosion behaviour, and updates some efforts made to extend the industrial application of Mg alloys. Based on the new understandings gained so far, future research directions are also suggested in the review. This review has the following logic. The first section "1. Scope"is a consolidation of the new understandings or developments regarding the Mg corrosion mechanism and the new applications for Mg alloys. It also highlights some key points for the review. The second section "2. Widely accepted knowledge" briefly summarizes the general understanding of Mg corrosion gained so far, which acts as the foundation for the following sections. The third section "3. Recently deepened insights" mainly briefs on some new insights into Mg corrosion phenomena based on recent findings. Different interpretations on the corrosion behaviours are comprehensively discussed in the fourth section "4. Controversial points" and the conclusions are drawn in the subsection"4.5 Clarified points". Apart from the fundamental understandings, various efforts in the application of Mg alloys are presented in the fifth section "5. New applications". Following the research tendency as indicated in the review, prioritized research areas are suggested in "*** directions". The review is concluded with "7. Concluding remarks" at last.

关键词： Mg Corrosion Hydrogen Anode Intelligentization

Dual Lie Bialgebra Structures of Twisted SchrSdinger-Virasoro Type

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Algebra Colloquium 2018年第4期25卷 627-652页

作者： guang'ai song Xiaoqing Yue College of Mathematics and Information Science Shandong Technology and Business University YantaiShandong 264005China School of Mathematical Sciences Tongji UniversityShanghai 200092China

In this paper,the structures of dual Lie bialgebras of twisted SchrSdinger-Virasoro type are *** studying the maximal good subspaces,we determine the dual Lie coalgebras of the twisted SchrSdinger-Virasoro *** based on this,we construct the dual Lie bialgebra structures of this *** by-products,four new infinite dimensional Lie algebras are obtained.

关键词： Schrodinger-Virasoro algebra Virasoro algebra Lie bialgebra dual Lie bialgebra

Dual Lie bialgebra structures of Poisson types

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Science China Mathematics 2015年第6期58卷 1151-1162页

作者： song guang'Ai SU YuCai College of Mathematics and Information Science Shandong Institute of Business and Technology Department of Mathematics Tongji University

Let A = F [x, y] be the polynomial algebra on two variables x, y over an algebraically closed field F of characteristic zero. Under the Poisson bracket, A is equipped with a natural Lie algebra structure. It is proven that the maximal good subspace of A* induced from the multiplication of the associative commutative algebra A coincides with the maximal good subspace of A* induced from the Poisson bracket of the Poisson Lie algebra A. Based on this, structures of dual Lie bialgebras of the Poisson type are investigated. As by-products,five classes of new infinite-dimensional Lie algebras are obtained.

关键词： algebra Poisson commutative maximal associative infinite triangular polynomial multiplication subspace

Corrosivity of haze constituents to pure Mg

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Journal of Magnesium and Alloys 2020年第1期8卷 150-162页

作者： Chen Zhao Fuyong Cao guang-Ling song Center for Marine Materials Corrosion and Protection College of MaterialsXiamen University422 S.Siming Rd.Xiamen 361005China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University422 S.Siming Rd.Xiamen 361005China

The corrosion behavior of pure Magnesium(Mg)in a Mg(OH)2-saturated solution containing different individual constituents of PM2.5 in haze were studied by hydrogen evolution,weight loss and electrochemical *** results indicated that the corrosivity of these constituents to pure Mg decreased in the following order:(NH4)2SO4>Haze-contaminated-solution>NH4NO3>NH4Cl>NaCl≈KCl≈Na2SO4≈MgCl2≈CaSO4>Mg(OH)2(basic solution)>Ca(NO3)*** mechanisms behind the different corrosion behaviors of Mg in response to these constituents were also briefly discussed in this paper.

关键词： Haze(PM2.5) Mg Corrosion

A corrosion-reconstructed and stabilized economical Fe-based catalyst for oxygen evolution

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Nano Research 2023年第2期16卷 2224-2229页

作者： Zhiquan Lang guang-Ling song Pengpeng Wu Dajiang Zheng Center for Marine Materials Corrosion and Protection Xiamen UniversityXiamen 361005China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China The University of Queensland St.LuciaQLD 4072Australia

The anode activity can to a great degree limit the cathodic hydrogen evolution efficiency in an electrolyte ***,cost-efficient electrocatalysts with good water oxidation performance and stability are highly desired in widespread implementation of the hydrogen production from water *** paper proposes a facile corrosion-reconstruction strategy to transform Fe surface into a Fe-Co hydroxide layer to improve the oxygen evolution *** as-prepared catalyst was measured to have an over-potentential as low as 320 mV at 100 mA·cm^(−2),and its stability even exceeded 600 *** and Raman spectroscopy analyses indicated that the catalyst experienced chemical changes from hydroxides to oxyhydroxides and Co^(2+)to Co^(3+)during oxygen evolution reaction(OER).The corrosion-reconstruction is not only an economical method to synthesize a highly efficient,stable and durable Fe-based catalysts,it also converses the detrimental corrosion into a beneficial catalyst fabrication process.

关键词： oxygen evolution reaction electrocatalyst corrosion stability

Galvanic Effect Between Galvanized Steel and Carbon Fiber Reinforced Polymers

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Acta Metallurgica Sinica(English Letters) 2017年第4期30卷 342-351页

作者： Chi Zhang Da-Jiang Zheng guang-Ling song Center for Marine Materials Corrosion and Protection State Key Laboratory of Physical Chemistry of Solid SurfaceCollege of MaterialsXiamen University School of Mechanical and Mining Engineering The University of Queensland

The galvanic corrosion behavior of carbon fiber reinforced polymers （CFRPs） GM-CFRP and Tepex-CFRP in contact with a Zn-coated DP590 steel in solution containing 0.9 wt% NaCl＋ 0.1 wt% CaCl2 ＋ 0.075 wt% NaHCO3 was investigated. The results showed that the GM-CFRP/steel couple was initially more resistant to galvanic corrosion, but its galvanic corrosion activity gradually became higher than the Tepex-CFRP/steel couple. The different galvanic behaviors of these two couples were discussed based on the electrochemical performance of GM-CFRP, Tepex-CFRP and DP590 coupons in the testing solution.

关键词： Carbon fiber reinforced polymer (CFRP) Composite Carbon fiber Steel Galvanic effect

What activates the Mg surface——A comparison of Mg dissolution mechanisms

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Journal of Materials Science & Technology 2020年第22期54卷 204-220页

作者： Jufeng Huang guang-Ling song Andrej Atrens Matthew Dargusch Center for Marine Materials Corrosion and Protection College of MaterialsXiamen UniversityXiamen 361005China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China Centre for Advanced Materials Processing and Manufacturing School of Mechanical and Mining EngineeringThe University of QueenslandSt.LuciaQld 4072Australia

Several mechanisms have been proposed to interpret the widely reported phenomenon of Mg corrosion that the hydrogen evolution rate increases with increasing anodic potential or anodic current density. This paper critically analyzed the two main mechanisms,(1) "the incomplete film univalent Mg+ion mechanism" and(2) "the enhanced catalytic activity mechanism", aiming to clarify the current understanding of the Mg corrosion mechanism and to provide a profound insight into the Mg characteristic electrochemical behavior, anodic polarization accelerating both hydrogen evolution and Mg dissolution. It is expected that the deepened fundamental understanding from this comprehensive mechanistic review will provide a basis of practical applications for Mg alloys and open up a new way to the control of corrosion of Mg alloys in practice.

关键词： Magnesium Negative difference effect(NDE) Corrosion Hydrogen evolution Anodic dissolution

The uncertainty propagation analysis of the projectile-barrel coupling problem

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Defence Technology（防务技术） 2017年第4期13卷 229-233页

作者： Lin-fang Qian guang-song Chen Nanjing University of Science & Technology 200 Xiaolingwei Nanjing Jiangsu 210094 China

Based on the model which couples the projectile and gun barrel during an interior ballistic cycle,the uncertainty propagation analysis of the model is presented caused by the uncertainty of the input *** Bootstrap method is employed to calculate the statistical moments(*** mean,variance,skewness coefficient and kurtosis coefficient)of the parameters of the ***,the maximum entropy method is used to estimate the probability density function(PDF)and the cumulative density function(CDF),the interval of the parameters of the projectile are also ***,the results obtained are compared to the results calculated by Monte Carlo(MC)method to verify the effectiveness of the presented ***,the rule and the uncertainty propagation model of the projectile-barrel coupling system are given with the variation of the uncertainties of the input parameters.

关键词： Uncertainty propagation Projectile-barrel coupling Bootstrap Maximum entropy Interval

A Universal Reduced Rupture Creep Approach for Failure Behavior of Aged Glass Polymers from the Rupture Creep Compliance by the Unified Master Prediction of Long Term Short Term Test of Curved Extrapolation

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Chinese Journal of Chemical Physics 2012年第5期25卷 552-562,I0003页

作者： guang-jun song Da-ming Wu Wei-yue song Ming-shi song Gui-xian Hu School of Mechanical and Electrical EnEineering Beijing University of Chemical Technology BeLying100029 China Department of Polymeric Material Science and Engineering Beijing Institute of Petrochemical Tech-nology Beijing 102617 China School of Materials Science and Engineering Beijing University of Chemical Technology Beijing100029 China

The prediction of long term failure behaviors and lifetime of aged glass polymers from the short term tests of reduced rupture creep compliance （or strain） is one of difficult problems in polymer science and engineering. A new ＂universal reduced rupture creep approach＂ with exact theoretical analysis and computations is proposed in this work. Failure by creep for polymeric material is an important problem to be addressed in the engineering. A universal equation on reduced extensional failure creep compliance for PMMA has been derived. It is successful in relating the reduced extensional failure creep compliance with aging time, temperature, levels of stress, the average growth dimensional number and the parameter in K-W-W function. Based on the universal equation, a method for the prediction of failure behavior, failure strain criterion, failure time of PMMA has been developed which is named as a universal ＂reduced rupture creep approach＂. The results show that the predicted failure strain and failure time of PMMA at different aging times for different levels of stress are all in agreement with those obtained directly from experiments, and the proposed method is reliable and practical. The dependences of reduced extensional failure creep compliance on the conditions of aging time, failure creep stress, the structure of fluidized-domain constituent chains are discussed. The shifting factor, exponent for time-stress superposition at different levels of stress and the shifting factor, exponent for time-time aging superposition at different aging time are theoretically defined respectively.

关键词： Reduced extensional failure creep compliance Extensional failure Predictionof failure strain and time PMMA Shifting factor Shifting exponent