钢筋混凝土腐蚀损伤检测的电测法及其尺寸效应

介绍了一种通过电阻率测量来对钢筋混凝土结构腐蚀损伤进行检测的新无损检测方法--电阻率测量的四探针法.讨论了这种方法在实际测量中的截面尺寸效应对电阻率的影响,从理论上推得了这种尺寸效应的修正公式.其计算结果与实验数据能较好吻合.     

锌锰干电池的一种代汞缓蚀剂

通过实验，筛选出一种新型缓蚀剂，这种缓蚀剂用于锌锰干电池中.完全可以代替汞（盐）。将这种缓蚀剂加入浆糊层中代替汞（盐），并制作了R20S电池，通过测量电池各项电性能，均达到或超过GB7112-86国家标准.贮存一年后放电容量保持新电池的94％。     

燃油锅炉高温粘结灰分析

本文分析了洞庭氮肥厂燃油锅炉产生严重高温粘结灰的原因和条件,提出了提高油的雾化质量,改善燃烧,以防止严重高温粘结灰的方案,并论证其方案的可行性。     

Models for Dependent Extremes Using Stable Mixtures

Abstract.  This paper unifies and extends results on a class of multivariate extreme value (EV) models studied by Hougaard, Crowder and Tawn. In these models, both unconditional and conditional distributions are themselves EV distributions, and all lower-dimensional marginals and maxima belong to the class. One interpretation of the models is as size mixtures of EV distributions, where the mixing is by positive stable distributions. A second interpretation is as exponential-stable location mixtures (for Gumbel) or as power-stable scale mixtures (for non-Gumbel EV distributions). A third interpretation is through a peaks over thresholds model with a positive stable intensity. The mixing variables are used as a modelling tool and for better understanding and model checking. We study EV analogues of components of variance models, and new time series, spatial and continuous parameter models for extreme values. The results are applied to data from a pitting corrosion investigation.     

火电厂循环冷却水中铵态氮对铜设备的腐蚀研究

火电厂常通过提高循环冷却水的浓缩倍率达到节水的目的，一些机组凝汽器铜管因此产生了腐蚀问题。通过实验，分析了陕西某电厂循环冷却水中的铵态氮对凝汽器铜管的腐蚀影响。实验表明，为较好地控制腐蚀速率，应使铵态氮浓度控制在6mg／L以下。     

Total System Performance Assessment for Waste Disposal Using a Logic Tree Approach

The Electric Power Research Institute (EPRI) has sponsored the development of a model to assess the long-term, overall performance of the candidate spent fuel and high-level radioactive waste (HLW) disposal facility at Yucca Mountain, Nevada. The model simulates the processes that lead to HLW container corrosion, HLW mobilization from the spent fuel, and transport by groundwater, and contaminated groundwater usage by future hypothetical individuals leading to radiation doses to those individuals. The model must incorporate a multitude of complex, coupled processes across a variety of technical disciplines. Furthermore, because of the very long time frames involved in the modeling effort (10⁴ years), the relative lack of directly applicable data, and many uncertainties and variabilities in those data, a probabilistic approach to model development was necessary. The developers of the model chose a logic tree approach to represent uncertainties in both conceptual models and model parameter values. The developers felt the logic tree approach was the most appropriate. This paper discusses the value and use of logic trees applied to assessing the uncertainties in HLW disposal, the components of the model, and a few of the results of that model. The paper concludes with a comparison of logic trees and Monte Carlo approaches.     

普通碳钢材料表面镍铜合金化

运用金属材料表面合金化的方法,对普通碳钢表层进行镍铜合金粉末热渗镀处理的试验原理,工艺及碳钢然材选择作了研究,并对采用此方法处理后的材料进行了耐氢氟酸腐蚀的实验,达到了预期效果。     

次亚磷酸钠体系电沉积Fe-Ni-P非晶态合金的研究

在次亚磷酸钠体系Ｆｅ－Ｎｉ－Ｐ合金电沉积新工艺中引进抗坏血酸和添加剂，得到了光亮的Ｆｅ－Ｎｉ－Ｐ合金，解决了槽液存在的不稳定因素．经能量色散谱和Ｘ－射线衍射分析证实得到了Ｆｅ－Ｎｉ－Ｐ非晶态合金；稳定电位测定表明，Ｆｅ－Ｎｉ－Ｐ合金耐蚀能力不亚于Ｎｉ－Ｐ合金，并高于光亮镀Ｎｉ层     

0Cr19Ni9涂层及涂层开裂处抗蚀行为研究

本文研究了电弧喷涂0Cr19Ni9涂层的抗蚀行为及涂层开裂后对涂层抗蚀效果的影响．研究结果表明．0Cr19Ni9涂层具有良好的抗蚀效果．涂层开裂将显著增加试样的腐蚀增重和腐蚀速度．通过运用一系列先进的分析手段如扫描电镜、能谱分析及X-ray等分析可知涂层抗蚀效果良好的主要原因是涂层表面致密的氧化铬阻止了腐蚀的进一步深入．涂层开裂导致抗腐蚀效果下降的主要原因是在开裂处形成了疏松的氧化铁．