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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

Understanding the role of alloyed Ni and Cu on improving corrosion resistance of low alloy steel in the simulated Beishan groundwater

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Journal of Materials Science & Technology 2022年第35期130卷 124-135页

作者： Yupeng Sun Xin Wei Junhua Dong Nan Chen Hanyu Zhao qiying ren Wei Ke School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China 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

The corrosion behavior of NiCu low alloy steel and Q235 low carbon steel as the candidate materials for geological disposal containers of high-level radioactive waste in the simulated Beishan groundwater was comparatively studied by weight loss test,electrochemical measurements,scanning electron microscope(SEM),electron probe microanalysis(EPMA),X-ray diffraction(XRD),Raman spectrum and X-ray photoelectron spectroscopy(XPS).The electrochemical results showed that the corrosion potential of NiCu steel and Q235 steel gradually increased with the immersion ***,the cathodic process transited from hydrogen evolution reaction(HER) control to the rust reduction control,while the anodic process was always dominated by the active dissolution of *** comparison,both the cathodic resistance and the anodic dissolution resistance of NiCu steel corrosion were apparently higher than that of Q235 *** results of rust layer characterization indicated that Ni and Cu elements could be enriched in the inner rust layer of NiCu steel and the rust layer was more *** the main corrosion products,the content of α-FeOOH in the rust layer of NiCu steel was obviously increased more than that of Q235 ***_(6)(OH)_(12)SO_(4)stably existed in the corrosion products of NiCu steel because Ni(Ⅱ) or Cu(Ⅱ)could substitute Fe(Ⅱ) of Fe_(6)(OH)_(12)SO_(4)and increased its oxidation resistance,Moreover,Ni and Cu could also make Fe3O4ionic selective by *** the long-term immersion,the corrosion mass loss of NiCu steel was significantly lower than Q235 steel,which further confirmed the benefits of Ni and Cu alloying on improving the steel corrosion resistance.

关键词： Deep geological disposal Container material Groundwater Corrosion behavior Electrochemical measurement

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)

Effects of bentonite content on the corrosion evolution of low carbon steel in simulated geological disposal environment

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Journal of Materials Science & Technology 2021年第7期66卷 46-56页

作者： Xin Weia Junhua Dong Nan Chen Amar Prasad Yadav qiying ren Jie Wei Changgang Wang Rongyao Ma Wei Ke Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Environmental Corrosion Centre of Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Central Department of Chemistry Tribhuvan UniversityKathmanduNepal

The effects of bentonite content on the corrosion behavior of low carbon steel in 5 mM NaHCO3+ 1 mM NaCl + 1 mM Na2SO4 solution were investigated by electrochemical measurements combined with X-ray diffraction(XRD) and scanning electron microscopy(SEM). In the initial immersion stage, the cathodic process of low carbon steel corrosion was dominated by the reduction of dissolved oxygen, while it transformed to the reduction of ferric corrosion products with the immersion time. The presence of bentonite colloids could suppress the cathodic reduction of oxygen due to their barrier effect on the diffusion of oxygen. However, the barrier performance of bentonite layer was gradually deteriorated due to the coagulation and separation of bentonite colloids caused by the charge neutralization of iron corrosion products dissolved from the steel substrate. More bentonite colloids could maintain the barrier effect for a long time before it was deteriorated by the accumulation of corrosion products. Conversely,it could lose the performance completely, and the corrosion behavior of low carbon steel reverted to the same as that in the blank solution.

关键词： Low carbon steel Bentonite Electrochemical measurements Corrosion products Corrosion evolution

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浅谈小学数学教学中的有效“纠错”

天津教育 2021年第36期 24-25页

作者：任启英山东省济南市莱芜区莲河学校

小学时期学生的数学思维与解题计算能力都处于发展阶段,加之缺乏丰富的解题经验,在学习和解题中出现失误是很常见的现象。教师作为教学活动的设计者与组织者,要帮助学生建立正确的态度以应对错题,引导学生从纠错过程中发现自己的短板与... 详细信息

小学时期学生的数学思维与解题计算能力都处于发展阶段,加之缺乏丰富的解题经验,在学习和解题中出现失误是很常见的现象。教师作为教学活动的设计者与组织者,要帮助学生建立正确的态度以应对错题,引导学生从纠错过程中发现自己的短板与优势,进而解决问题,形成良好的纠错意识,从根本上寻找学生出错的原因,提升学生的数学能力。

关键词：小学数学有效纠错

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实验室开放管理的新工科人才培养探索

实验室研究与探索 2019年第6期38卷 231-234页

作者：王文成侯崇升吴小进杜德任启迎潍坊学院信息与控制工程系山东潍坊261061 北京新大陆时代教育科技有限公司北京100044

新工科人才培养的需求对传统实验教学模式提出了挑战,如何主动加快工程教育创新已成为高校实验室改革的重要内容。针对传统的实验教学和实验室管理中存在问题,分析了新形势下工科专业建立开放性实验室的必要性,明确了实验室开放和管理... 详细信息

新工科人才培养的需求对传统实验教学模式提出了挑战,如何主动加快工程教育创新已成为高校实验室改革的重要内容。针对传统的实验教学和实验室管理中存在问题,分析了新形势下工科专业建立开放性实验室的必要性,明确了实验室开放和管理的基本原则,从建立网络化信息管理体系、引导学生参与实践活动和完善实验室管理政策三个方面详细阐述了开放实验室建设的具体实施措施和建议。该模式不但能够充分调动学生进行实践创新的主动性,而且可以减轻实验室管理人员的工作强度,为培养高素质工科人才探索出一条新的途径。

关键词：开放实验室管理体系人才培养模式创新实践型

定期清洗锅炉换热管壁是提高锅炉热效率和延长锅炉使用寿命的有效途径

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黑龙江电力 2005年第3期27卷 215-217页

作者：过伟权李清均任起赢王显章哈尔滨市顺天锅炉清洗有限公司黑龙江哈尔滨150016 黑龙江省人民政府国资委员会黑龙江哈尔滨150001 南宁化工股份有限公司广西南宁530020 黑龙江省电力科学研究院黑龙江哈尔滨150030

阐述了锅炉换热管外壁(如省煤器、空气预热器、水冷壁、过热器等)积灰和结焦对锅炉运行造成的危害,通过广西南宁某电厂BG-39/35-450-M2型锅炉的清洗实例,表明对锅炉换热管壁定期进行清洗,会大大减少换热管表面腐蚀和磨损,增大热交换面积... 详细信息

阐述了锅炉换热管外壁(如省煤器、空气预热器、水冷壁、过热器等)积灰和结焦对锅炉运行造成的危害,通过广西南宁某电厂BG-39/35-450-M2型锅炉的清洗实例,表明对锅炉换热管壁定期进行清洗,会大大减少换热管表面腐蚀和磨损,增大热交换面积,减少烟气排放阻力,降低排烟温度,提高锅炉热效率,延长锅炉的使用寿命。

关键词：积灰结焦清洗

A Bounded Commitment in Vertical Collaborations of New Product Development

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Journal of Systems Science and Information 2021年第2期9卷 154-174页

作者： Zehui GE Zhengkun ren qiying HU Yiheng JIA School of Economics and Management University of Science and Technology BeijingBeijing 100083China School of Management Fudan UniversityShanghai 200433China

Uncertainty is a main source of opportunistic behaviors in research and development cooperations,which challenges strategic decisions ranging from investments to *** avoid opportunism arising in cooperations,commitments(either formal contracts or informal communications)are generally made in advance by members of an ***,how does a commitment encourage R&D investments and ultimately enhance the total performance,without loss of flexibility in ex post operations?This study attempts to answer this by investigating a bounded commitment in the context of vertical collaborations in a supply *** this exploratory study,a 3-stage game model is used(by backward induction)to examine a two-echelon supply chain under a bounded commitment in *** analysis shows that upstream R&D investment is stimulated more and that both members are better off under the bounded *** the same time,when the relative bargaining power between the supplier and the manufacturer falls into an appropriate area,it is possible to reach a bounded commitment,and the manufacturer is more sensitive to this ***,the bounded commitment restrains opportunistic behaviors,but there is no strong sign that an increase in the ratio of the order outside the chain to the inside one can make firms better.

关键词： new product development R&D cooperation supply chain management commitment opportunistic behavior

对外直接投资、制度环境与绿色全要素生产率——基于广义分位数与动态门限面板模型的实证研究

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国际商务（对外经济贸易大学学报） 2019年第3期 83-96页

作者：任思雨吴海涛冉启英新疆大学经济与管理学院新疆乌鲁木齐830047 新疆大学创新管理研究中心新疆乌鲁木齐830047

基于SBM-DDF的Luenberger生产率指数测算了我国30个省市2006～2016年的绿色全要素生产率;构建广义分位数模型和动态门限回归模型考察了地区腐败、市场化进程和知识产权保护外生制度环境下对外直接投资对我国绿色全要素生产率的结构突变... 详细信息

基于SBM-DDF的Luenberger生产率指数测算了我国30个省市2006～2016年的绿色全要素生产率;构建广义分位数模型和动态门限回归模型考察了地区腐败、市场化进程和知识产权保护外生制度环境下对外直接投资对我国绿色全要素生产率的结构突变和动态门限效应。研究发现,对外直接投资对我国绿色全要素生产率影响的边际效应发生了结构变化;随着地区腐败程度的加深,我国绿色全要素生产率逐渐降低;以市场化进程和知识产权保护作为门限变量,跨越门限点后对外直接投资对我国绿色全要素生产率的拉动作用依次增强。东、中、西三大区域对外直接投资逆向技术溢出效应表明,东部、中部地区对外直接投资显著地促进了我国绿色全要素生产率的提升,西部地区则不显著。

关键词：绿色全要素生产率制度环境广义分位数动态门限模型

OFDI逆向技术溢出、制度质量与区域创新能力——基于两步差分GMM门槛面板模型的实证分析

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科技进步与对策 2019年第7期36卷 40-47页

作者：冉启英任思雨吴海涛新疆大学创新管理研究中心新疆大学经济与管理学院新疆乌鲁木齐830047

基于2005—2016年我国省际面板数据,首先通过OLS、DIFF-GMM、SYS-GMM3种基准线性回归方法论证了OFDI逆向技术溢出对我国区域创新能力的促进作用。以OFDI为核心解释变量,分别构建以地区腐败、市场化程度和知识产权保护为门槛变量的动态... 详细信息

基于2005—2016年我国省际面板数据,首先通过OLS、DIFF-GMM、SYS-GMM3种基准线性回归方法论证了OFDI逆向技术溢出对我国区域创新能力的促进作用。以OFDI为核心解释变量,分别构建以地区腐败、市场化程度和知识产权保护为门槛变量的动态门槛回归模型。结果发现:随着地区腐败程度加深,我国区域创新能力逐渐减弱;以市场化程度、知识产权保护为门槛变量,跨越门槛点后OFDI对我国区域创新能力的拉动作用依次增强。最后,结合面板向量自回归模型进一步研究对外直接投资过程中地区腐败、市场化程度和知识产权保护对区域创新能力的动态即期冲击。结果显示:市场化程度单位变动对区域创新能力的影响呈现正向冲击且持续性较强,知识产权保护对区域创新能力的拉动最为迅速但后期持续性较弱,地区腐败对区域创新能力产生负向冲击作用。

关键词：制度质量区域创新能力 OFDI逆向技术溢出