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Journal of Iron and steel Research International 2024年第2期31卷 501-518页

作者： Bao-sheng Liu Peng-fei Xu Shao-hua Zhang Yan-rui Li Li-ming Mou Jia-li Li Yue-zhong Zhang Pei-mao Fu Fa-cai Shi College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina College of Chemical and Biological Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina Technical Center Taiyuan Iron and Steel(Group)Co.Ltd.Taiyuan030003ShanxiChina

The corrosion mechanism of 510L low alloy steel treated by acid-cleaned surface(ACS)and eco-pickled surface(EPS)techniques in three simulated solutions(S0:atmospheric environment;S1:soil environment;S2:industrial environment)and the influence of interaction between different corrosive anions on corrosion were *** results show that the total corrosion rates of samples in three simulated solutions were in order of S2>S0>S1,which is simultaneously correlated with initial corrosion dissolution processes as well as after the formation of corrosion ***3−will inhibit the initial corrosion owing to the formation of films,whereas HSO3−will accelerate the dissolutions of the matrix based on the synergistic action of HSO3−and Cl−.On the other hand,there is no significant difference in corrosion rates between the samples treated by ACS and EPS *** EPS technique that is safe,reusable and environmentally friendly can be further widely used in future work.

关键词： Corrosion mechanism low alloy steel Simulated solution Surface technique Immersion time

Effects of Aerobic and Anoxic Conditions on the Corrosion Behavior of NiCu low alloy steel in the Simulated Groundwater Solutions

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Acta Metallurgica Sinica(English Letters) 2023年第5期36卷 745-757页

作者： Xin Wei Yupeng Sun Junhua Dong Nan Chen Qiying Ren Wei Ke Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China Environmental Corrosion Centre of Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

The present work focused on investigating the corrosion behavior of NiCu low alloy steel in 0.05 M NaHCO_(3) solutions with different Cl−concentrations under the aerobic–anoxic *** results showed that NiCu steel tended to be pseudo-passivated in the solutions of 0.05 M NaHCO_(3) and 0.05 M NaHCO_(3)+0.01 M NaCl exposed to *** cathodic process transformed from oxygen reduction to the common reduction of oxygen andα-FeOOH,while the anodic process was the iron *** Cl^(−)increased to 0.1 M,the steel tended to be activity *** to the blocking effect of rust layer on the oxygen,the cathodic process transformed to the reduction ofα-*** the solutions were deoxidized,the cathodic process was controlled by only rust ***,both the cathodic process and anodic process of NiCu steel corrosion were significantly *** the whole aerobic–anoxic immersion,the corrosion rate of NiCu steel increased with Cl^(−)*** was not only related to the promotion of Cl^(−)on the anodic dissolution of steel,but also related to the cathodic reduction of moreα-FeOOH generated,which could accelerate the cathodic process.

关键词： low alloy steel Aerobic-anoxic condition Corrosion behavior Corrosion products Electrochemical measurements

Predicting the martensite transformation start-temperature of low alloy steel based on fuzzy identification

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Journal of University of Science and Technology Beijing 2004年第5期11卷 462-468页

作者： YueJiang ZhongdaYin PengchaoKang YongLiu SchoolofMaterialsScienceandEngineering HarbinInstituteofTechnologyHarbin150001China

A method of fuzzy identification based on T-S fuzzy model was proposed for predicting temperature Ms from chemical composition, austenitizing temperature and time for low alloy steel. The degree of membership of each sample was calculated with fuzzy clustering algorithm. Kalman filtering was used to identify the consequent parameters. Compared with the results obtained by empirical models based on the same data, the results by the fuzzy method showed good precision. The accuracy of the fuzzy model is almost 6 times higher than that of the best empirical model. The influence of alloying elements, austenitizing temperature and time on Ms was analyzed quantitatively by using the fuzzy model. It is shown that there exists a nonlinear relationship between the contents of alloying elements in steels and their Ms, and the effects of austenitizing temperature and time on Ms temperature cannot be neglected.

关键词： fuzzy identification prediction model martensite transformation start-temperature Ms alloying element low alloy steel

pH-dependent corrosion initiation behavior induced by inclusions of low alloy steel in simulated marine environments

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Journal of Iron and steel Research International 2023年第10期30卷 2067-2079页

作者： Heng Ma Zhong-xue Wang Yue Liu Yue-xiang Wang Teng-fei Wang Qing-pu Zhang Zhong-yu Cui Yinshan Section steel Corporation of Laiwu steel Group Ltd. Jinan 271104ShandongChina School of Materials Science and Engineering Ocean University of ChinaQingdao 266100ShandongChina

The initial pitting corrosion behavior triggered by inclusions in S420 low alloy steel in acidic artificial seawater(ASW)and weak-alkaline ASW was *** geometric data of the corrosion pits formed in the ASW with different pH were *** pH of the ASW has an obvious influence on the pit *** pits in acidic ASW exhibit a funnel shape,while those in weak-alkaline ASW present a cone shape with a larger pit *** reason for the difference in the morphology and size of the corrosion pits induced by inclusion is that it is easier to trigger micro-galvanic corrosion in different structures and different areas of the pits in the acidic environment.

关键词： low alloy steel Inclusion Pitting corrosion Micro-galvanic corrosion

Influence of Deteriorated Bentonite Sediments on the Corrosion Behavior of NiCu low alloy steel

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Acta Metallurgica Sinica(English Letters) 2022年第6期35卷 1011-1022页

作者： Xin Wei Junhua Dong Yupeng Sun Nan Chen Qiying Ren Madhusudan Dhakal Xiaofang Li Wei Ke Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Environmental Corrosion Centre of Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

The corrosion evolution of steel disposal container largely depends on the evolution of surrounding bentonite environment in the long-term geological disposal of high-level radioactive wastes. This study focused on the influence of the deteriorated bentonite sediments on the corrosion behavior of NiCu low alloy steel in the top supernatant and bottom slurry formed by Gaomiaozi bentonite and 0.05 M NaHCO_(3) + 0.1 M NaCl + 0.1 M Na_(2)SO_(4) solution. In the top supernatant, the cathodic process of the steel corrosion was transformed from the reduction in oxygen to the reduction in ferric corrosion products with time as same as that in the blank solution. While in the bottom bentonite slurry, the cathodic process always maintained as the hydrogen evolution reaction due to the coverage of more bentonite sediments. Meanwhile, the corrosion rate of NiCu steel was obviously decreased. In addition, the localized corrosion tendency of the steel could also be reduced by the large amount of deteriorated bentonite sediments.

关键词： low alloy steel Bentonite Corrosion behavior Corrosion products Electrochemical impedance spectroscopy(EIS)

The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater

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Journal of Materials Science & Technology 2020年第19期54卷 119-131页

作者： Yong Li Zhiyong Liu Endian Fan Zhongyu Cui Jinbin Zhao Corrosion and Protection Center University of Science and Technology BeijingBeijing 100083China Shandong Key Laboratory of Corrosion Science Institute of OceanologyChinese Academy of SciencesQingdao 266071China School of Materials Science and Engineering Ocean University of Chin1Qingdao 266100China Jiangsu Key Laboratory for Premium steel Material Nanjing Iron&Steel United Co.Ltd.Nanjing 210035China

The environment at crack tip and its effect on the crack growth behaviour of low alloy steel-E690 steel were studied at cathodic potentials in artificial *** results showed that the micro environment at crack tip and crack growth behaviour were related to the electrochemical reactions at crack tip,which were affected by the stress state and applied *** crack tip environment was acidified under cyclic loading,resulting from the crack tip anodic dissolution reaction and corresponding hydrolysis *** of the hydrogen evolution and the inhibited anodic dissolution inside the crack,the crack tip p H increases as the cathodic potential *** effect of cathodic potentials on the electrochemical reactions caused the variation of the hydrogen content,which influenced the crack growth rate because the crack growth behaviour was controlled by hydrogen embrittlement *** resulted in a fact that with the negative decrease of potential,the crack growth rate first decreased and then increased,with the minimum rate at-0.75 *** the crack growth path exhibited transgranular fracture.

关键词： low alloy steel Stress state Cathodic potential Crack tip environment Crack growth behaviour

ISOCHRONOUS STRESS-STRAIN CURVES OF low alloy steel CROSS-WELD-SPECIMEN AT HIGH TEMPERATURE

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Acta Metallurgica Sinica(English Letters) 2004年第4期17卷 612-617页

作者： C.W.Ma F.Z.Xuan Z.D.Wang S.T.Tu East China University of Science and Technology Shanghai 200237 ChinaEast China University of Science and Technology Shanghai 200237 ChinaEast China University of Science and Technology Shanghai 200237 ChinaEast China University of Science and Technology Shanghai 200237 China Nanjing University of Technology Nanjing 210009 China

In this work, a parametric approach is presented and utilized to determine the creep properties of weldments; then the model of creep strain for cross weld specimen is given. On the basis of the experimental results, attempt has been made to establish equations of the isochronous stress-strain for weld joint that can predict the function of loading and service time in use of the creep data of base metal and weld metal.

关键词： isochronous stress-strain curve creep deformation high temperature welded joint low alloy steel

Effect of Small Content of Chromium on Wet–Dry Acid Corrosion Behavior of low alloy steel

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Acta Metallurgica Sinica(English Letters) 2017年第2期30卷 164-175页

作者： Qing-He Zhao Wei Liu Yi-Chun Zhu Bin-Li Zhang Shuan-Zhu Li Min-Xu Lu Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China

Effect of small content of chromium（Cr） on wet–dry acid corrosion behavior of low alloy steels has been *** results show that the corrosion resistance of the steels increased with increasing Cr content from 0.10 to0.50 wt%.Higher content of Cr promotes initial corrosion and accelerates the formation of dense and protective rust in long-term *** enhanced protectiveness of the rust is closely related to its *** content of Cr increases the content of amorphous phases and decreases the content of c-Fe OOH in the rust,resulting in the high compactness of the rust and low electrochemical activity in acid *** dopes in rust and depresses the transformation from amorphous phases to a-Fe OOH,as well as the growth process of Fe OOH particles,which is responsible for the enhanced compactness of rust in long-term corrosion.

关键词： low alloy steel Chromium Corrosion EIS TEM

Progress in corrosion-resistant coatings on surface of low alloy steel

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Journal of Iron and steel Research International 2023年第2期30卷 193-215页

作者： Bao-sheng Liu Jia-li Li Wen-jie Guo Peng-fei Xu Shao-hua Zhang Yue-zhong Zhang College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina College of Chemical Engineering and Technology Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina

low alloy steels are widely used in bridges,construction,chemical and various equipment and metal components due to their low cost and excellent mechanical *** in the literature related to the preparation,advantages and disadvantages,and applications along with research progress of various types of protective coatings suitable for low-alloy steel surfaces is reviewed,while a conclusive and comparative analysis is also afforded to the numerous factors influencing the protective ability of *** characteristics of coatings drawn from the latest published literature are discussed and suggest that the modification of traditional metal coatings and the development of new organic coatings under the consideration of environmental protection,low cost,simplicity and large-scale industrial application are simultaneously proceeding,which holds promise for improving the understanding of corrosion protection in related fields and helps to address some of the limitations identified with more conventional coating techniques.

关键词： low alloy steel Corrosion-resistant coating Metal coating Composite coating Diffusion coating Organic coating

Characterization of Rust Layer Formed on low alloy steel Exposed in Marine Atmosphere

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Journal of Materials Science & Technology 2002年第5期18卷 455-458页

作者： QuanchengZHANG JianshengWU WenlongZHENG JianjunWANG JiaguangCHEN XiaofangYANG AibaiLi Lab. for High Temp. Mat. Shanghai Jiaotong Univ. Shanghai 200030 China Shanghai Inst. of Mat. Sci. Shanghai 200379 China Baosteel Group of Shanghai Shanghai 200961 China

The iron rust phases formed on low alloy steels containing different quantities of Cr element have been characterized using EPMA, Raman spectroscopy, TEM, optical microscopy etc. The ion selective properties of synthesized rust films with the same phase constituent as the atmospheric corrosion products were investigated using self-made apparatus. The results showed that corrosion loss of steels exposed in marine atmosphere decreased rapidly as the Cr content of the steel was increased. Cr-containing steels were covered by a uniform compacted rust layer composed of fine particles with an average diameter of several nanometers. Inner rust layer of Cr-containing steel (2 mass fraction) was composed of a-CrxFe1-xOOH, with Cr content of about 5 mass fraction. Such rust layer showed cation selective property, and could depress the penetration of Cl- to contact substrate steel directly.

关键词： Corrosion Marine atmosphere low alloy steel Iron oxyhydroxide