共查询到20条相似文献,搜索用时 109 毫秒
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中原油田所用的阿根廷套管大量不合格,对其进行无损探伤和解剖分析后发现,主要缺陷是折叠和大型非金属夹杂物。 相似文献
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分析了影响管材涡流检测可靠性的主要原因,介绍了探伤仪器、穿过式探头及装置所采取的技术改进措施及其在涡流自动检测系统中的应用情况以及检测效果。 相似文献
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介绍了影响钢管尺寸精度的主要因素及近年来国外开发的γ射线在线无损检测钢管外径和壁厚的检测与控制技术。比较了不同钢管生产方法壁厚控制的特点。不管采用何种钢管生产方法,都可通过优化模具设计和工艺制度,提高钢管的尺寸精度。 相似文献
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有机涂层性能评价技术研究进展 总被引:4,自引:0,他引:4
一系列用于有机涂层性能评价的技术及其特点,并将其划分成化学测量技术和物理测量技术.其中,化学测量技术包括交流阻抗技术、电化学噪声、Kelvin探头技术等;物理测量技术有红外光谱技术,电子自旋共振谱,正电子湮灭寿命谱等.综述了这些技术的开发与应用,并展望了涂层性能评价技术的未来.
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Miguel A.G. Aranda 《Crystallography Reviews》2016,22(3):150-196
The portfolio of available synchrotron radiation techniques is increasing notably for cements and pastes. Furthermore, sometimes the terminology is confusing and an overall picture highlighting similarities and differences of related techniques was lacking. Therefore, the main objective of this work is to review recent advances in synchrotron techniques providing a comprehensive overview. This work is not intended to gather all publications in cement chemistry but to give a unified picture through selected examples. Crystallographic techniques are used for structure determination, quantitative phase analyses and microstructure characterization. These studies are not only carried out in standard conditions but synchrotron techniques are especially suited to non-ambient conditions: high temperatures and pressures, hydration, etc., and combinations. Related crystallographic techniques, like Pair Distribution Function, are being used for the analysis of ill-crystalline phase(s). Furthermore, crystallographic tools are also employed in imaging techniques including scanning diffraction microscopy and tomography and coherent diffraction imaging. Other synchrotron techniques are also reviewed including X-rays absorption spectroscopy for local structure and speciation characterizations; small angle X-ray scattering for microstructure analysis and several imaging techniques for microstructure quantification: full-field soft and hard X-ray nano-tomographies; scanning infrared spectro-microscopy; scanning transmission and fluorescence X-ray tomographies. Finally, a personal outlook is provided. 相似文献
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This paper presents a review of the application of electrochemical techniques in studying the microbially influenced corrosion (MIC) process of metals and their alloys. Some electrochemical techniques used in microbiology and biofilm study are discussed as well as some classic electrochemical techniques, such as corrosion potential, redox potential, polarization curves, electrochemical impedance spectroscopy, electrochemical noise and microelectrode techniques. Electrochemical quartz crystal microbalance (EQCM) which is seldom used in MIC study is also discussed. 相似文献
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综述了近年来微区电化学测试系统的各项技术设备原理及应用的发展概况,分别探讨了扫描振动参比电极技术(SVET)、扫描开尔文探针(SKP)、局部电化学交流阻抗谱(LEIS)和扫描电化学显微镜(SECM)等微区电化学测量系统在腐蚀理论研究与防护技术领域的应用;并指出在发展更加精密、可靠和满足快速的SVET、SKP、LEIS和SECM等微区电化学测量系统的同时,将以上技术用于金属各种局部腐蚀的机理和相组织腐蚀电化学的研究中,不但可以积累以上技术关于腐蚀电化学研究中的基础数据与规律,还可以加快这些技术的发展。 相似文献
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应用机械设计原理、计算机测控技术和安全防护技术,使大口径枪弹分解作业实现了遥控隔离操作、现场监视、自动计数和自动供弹等功能,攻克了在瞬爆弹、燃烧弹拔弹过程时,发生意外爆燃时安全防护的技术难题,为报废弹药处理中的安全防护提供了全新的技术手段. 相似文献