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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 648-664页

作者： Zhaochen Yu Kaixuan Feng Shuyun Deng Yang Chen Hong Yan honggun song Chao Luo Zhi Hu School of Advanced Manufacturing Nanchang UniversityNanchang330031China Institute for Advanced Study Nanchang UniversityNanchang330031China

The phosphate protective film and micro-galvanic corrosion of biological Mg-3Zn-xNd (x = 0, 0.6, 1.2) alloys were investigated by scanning and transmission electron microscopy, quasi-in-situ observation, scanning Kelvin probe force microscopy (SKPFM) and electrochemical tests. The results revealed the Mg-Zn-Nd phases formed in Mg-3Zn alloy contained with Nd. Adding Nd resulted in a significant decline in the cracks of the phosphate protective film and micro-galvanic corrosion of alloys, which were recorded by quasi-in-situ observation. In addition, the Volta potential difference of Mg-Zn-Nd/α-Mg (~ 188 mV) was lower than MgZn/α-Mg (~ 419 mV) and Zn-rich/α-Mg (~ 260 mV), and the corrosion rates of alloys markedly decreased after the addition of 0.6 wt% Nd. The improvement in corrosion resistance of Nd-containing alloys was mainly attributed to the following: (i) the addition of Nd reduced the Volta potential difference (second phases/α-Mg);(ii) the phosphate protective film containing Nd_(2)O_(3) deposited on the surface of the alloys, effectively preventing the penetration of harmful anions.

关键词： Magnesium alloys Quasi-in-situ observation Phosphate protective film Scanning Kelvin probe force microscopy(SKPFM) Micro-galvanic corrosion

Sodium dodecyl sulfate (SDS) as an effective corrosion inhibitor for Mg-8Li-3Al alloy in aqueous NaCl: A combined experimental and theoretical investigation

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Journal of Magnesium and Alloys 2023年第1期11卷 287-300页

作者： honggun song Zhidong Xu Lahouari Benabou Zheng Yin Hongyu Guan Hong Yan Luo Chao Zhi Hu Xudong Wang Department of Mechanical and Electrical Engineering Nanchang UniversityNanchang330031China UniversitéParis-Saclay UVSQLISV78124Vélizy-VillacoublayFrance Institute for Advanced Study Nanchang UniversityNanchang330031China

The corrosion inhibition behavior of Mg-8Li-3Al alloy in NaCl solution with sodium dodecyl sulfate(SDS)was investigated by hydrogen analysis,scanning electron microscopy(SEM),electrochemical test,scanning Kelvin probe force microscopy(SKPFM)and computational *** showed that the corrosion resistance of Mg-8Li-3Al alloy in NaCl solution was effectively improved with *** SEM and SKPFM results confirmed a dense,200 nm-thick SDS-adsorbed layer had formed on the alloy *** separation energy ΔE_(gap) and adsorption energy E_(ads) of SDS on the Mg surface were calculated by density functional theory and molecular dynamics simulations,*** the corrosion inhibition mechanism was hypothesized and described.

关键词： Mg-Li alloy Corrosion Sodium dodecyl sulfate Scanning kelvin probe force microscopy Density functional theory Molecular dynamics

In-situ AFM and quasi-in-situ studies for localized corrosion in Mg-9Al-1Fe-(Gd) alloys under 3.5 wt.% NaCl environment

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Journal of Magnesium and Alloys 2024年第3期12卷 1170-1185页

作者： Junping Shen Tao Lai Zheng Yin Yang Chen Kun Wang Hong Yan honggun song Ruiliang Liu Chao Luo Zhi Hu School of Advanced Manufacturing Nanchang UniversityNanchang 330031China Institute for Advanced Study Nanchang UniversityNanchang 330031China Singapore Centre for Environmental Life Sciences Engineering Nanyang Technological University60 Nanyang Drive 637751Singapore

Revealing the localized corrosion process of Mg alloy is considered as one of the most significant ways for improving its corrosion *** reliable monitor should be high distinguishability and real-time in liquid ***,Mg-9Al-1Fe and Mg-9Al-1Fe-1Gd alloys were designed to highlight the impact of intermetallic on the corrosion ***-situ AFM with a special electrolyte circulation system and quasi-in-situ SEM observation were used to monitor the corrosion process of the designed ***-EDS and TEM-SAED were applied to identify the intermetallic in the designed alloys,and their volta potentials were measured by *** to the real-time and real-space in-situ AFM monitor,the corrosion process consisted of dissolution of anodicα-Mg phase,accumulation of corrosion products around cathodic phase and shedding of some fine cathodic ***,the localized corrosion process of Mg alloy was revealed combined with the results of the monitor of corrosion process and Volta potential difference.

关键词： Magnesium Localized corrosion In-situ AFM SKPFM Corrosion behaviour.

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多质量特性涡旋盘计算机辅助选择装配

计算机集成制造系统 2017年第12期23卷 2640-2646页

作者：宋红滚刘国平刘建胜杨娟南昌大学机电工程学院江西南昌330031

涡旋动盘与静盘是涡旋压缩机的关键零件,其装配涉及多项质量参数,是整机装配中的关键和难点。首先对涡旋动静盘的装配特征进行分析,建立了基于方差模式的径向和轴向间隙波动最小及不匹配率最低的多目标装配质量综合评定函数,以进一步减... 详细信息

涡旋动盘与静盘是涡旋压缩机的关键零件,其装配涉及多项质量参数,是整机装配中的关键和难点。首先对涡旋动静盘的装配特征进行分析,建立了基于方差模式的径向和轴向间隙波动最小及不匹配率最低的多目标装配质量综合评定函数,以进一步减少波动对装配质量的影响;然后设计了采用遗传算法的计算机辅助选择装配方法,实验结果与互换法进行了比较,验证了该方法能够解决涡旋动静盘多质量参数的装配,并有效实现了径向间隙和轴向间隙的波动最小,使不匹配率最低。

关键词：涡旋压缩机计算机辅助选择装配多质量特性遗传算法

数显千分表在涡旋压缩机型面距离检测中的应用

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制造技术与机床 2012年第3期 100-103页

作者：胡瑢华罗伟刘国平宋红滚南昌大学机电工程学院江西南昌330031

用数显千分表进行涡旋压缩机型面距离检测的方法,以PLC、触摸屏为平台设计了调整垫片厚度检测系统,包括机架检测装置与动盘检测装置。该测量方法针对性强,能够满足零部件的精度要求。

关键词：涡旋压缩机垫片选配型面检测数显千分表

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基于点集拓扑学涡旋曲面轮廓度误差评定

现代制造工程 2017年第12期 133-138,145页

作者：宋红滚刘国平刘建胜王轮南昌大学机电工程学院南昌330031

对自由曲面的轮廓度误差进行评定是精密测量中的一个难点。在涡旋压缩机制造过程中,检测方面亟待解决涡旋齿曲面轮廓度误差评定问题。点集拓扑学运用于曲面轮廓的表述,具有原理清晰、数据处理简洁的特点,据此建立曲面轮廓度评定数学模型... 详细信息

对自由曲面的轮廓度误差进行评定是精密测量中的一个难点。在涡旋压缩机制造过程中,检测方面亟待解决涡旋齿曲面轮廓度误差评定问题。点集拓扑学运用于曲面轮廓的表述,具有原理清晰、数据处理简洁的特点,据此建立曲面轮廓度评定数学模型,结合涡旋齿曲面型线特征的分析,通过从空间坐标系的建立、点到曲面距离的计算、曲面平动与旋转等方面构建适用于涡旋齿曲面的最小二乘轮廓度误差评定算法。实例研究中,采用德国卡尔蔡司三坐标UMC550采集的点位数据应用到评定算法中计算轮廓度值,实验验证了基于点集拓扑原理构建涡旋曲面轮廓度误差评定模型算法的有效性及高精度,为自主开发涡旋型线检测专机中涡旋轮廓度评定软件提出了一种解决办法,具有较高的应用参考价值。

关键词：曲面轮廓度数学模型误差评定

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对称腔非同步排气涡旋空气压缩机热力学研究

中国机械工程 2014年第20期25卷 2715-2718页

作者：王俊亭刘国平余廷芳肖根福宋红滚南昌大学南昌330031

为了研究对称腔非同步排气涡旋空气压缩机的热力学特性,结合其几何特点对热力学过程进行了计算。计算过程分为两排气腔压力不等和相等两个阶段,分别建立了热力学拓扑结构,避免了排气腔容积较小时引起的热力学计算误差放大。给出了与计... 详细信息

为了研究对称腔非同步排气涡旋空气压缩机的热力学特性,结合其几何特点对热力学过程进行了计算。计算过程分为两排气腔压力不等和相等两个阶段,分别建立了热力学拓扑结构,避免了排气腔容积较小时引起的热力学计算误差放大。给出了与计算过程相适应的排气量、温度计算方法。热力学计算结果与实验结果相一致。对一个压缩过程中的压力和温度曲线进行了详细分析。

关键词：涡旋空气压缩机非同步排气温度压力热力学计算