一种海水缓蚀剂缓蚀行为的研究

利用电化学方法和表面分析测试技术，研究了有机膦酸醇酯类缓蚀剂(YKI-05)对于907A钢在天然海水中的缓蚀行为．实验表明，在静态海水中，浓度为300mg／L的YKI-05缓蚀剂能在907A钢表面形成稳定的缓蚀膜层，是一负催化阴极型缓蚀剂，在实验周期内其对907A钢的缓蚀效率较高；并用原子力显微镜(AFM)和俄歇电子能谱(AES)对该缓蚀膜的表面形貌和成分进行分析．     

基于三维有限元动态模拟圆柱形表面腐蚀缺陷漏磁场

根据电磁场有限元分析的基础理论，对储罐底板圆柱形表面腐蚀缺陷，应用ANSYS三维有限元静态分析了圆柱形表面腐蚀缺陷漏磁场，得到了圆柱形表面腐蚀缺陷漏磁场的空间分布。在一定条件下，静态模拟的缺陷漏磁场受励磁结构中永磁铁磁场的影响较大，造成在永磁铁附近漏磁场分布的畸变。而动态模拟下得到的漏磁场只在缺陷附近有明显的变化，缺陷漏磁场受励磁结构中永磁铁磁场的影响很小，有利于对腐蚀缺陷的分析。     

表面扩渗Al,Zn处理对ZM5镁合金性能的影响

通过铝锌(Al,Zn)混合粉对ZM5镁合金进行了表面固态扩渗铝锌(Al,Zn)处理,在衬底形成了Mg-Al-Zn合金层.研究结果表明:Mg-Al-Zn合金层主要由Mg-Al-Zn固溶体和Mg-Al-Zn金属间化合物(Al6Mg10Zn,Al5MgllZn4)组成,该合金层不仅使ZM5镁合金表面合金层显微硬度显著提高,而且在盐水浸泡腐蚀过程中,在衬底与腐蚀介质之间起到了良好的屏障作用,从而赋予试样良好的腐蚀性能.     

CSP线Q235变形规律及微观组织实验研究

借助Gleeble-1500热模拟机,研究了Q235钢不同温度、不同变形量及不同变形速率等参数对变形抗力及组织的影响规律,为生产实践提供了参考。     

金属表面硅烷化防护处理及其研究现状

综述了一种新型的金属表面防护处理技术--硅烷化处理的研究现状.对硅烷膜的制备工艺、表征及膜覆盖电极的性能进行了详细介绍.文中也同时探讨了硅烷溶液的水解与失效问题,这两个基础问题的研究有助于了解金属表面硅烷膜的形成,并对制备工艺的优化起到决定性作用.最后还介绍了更具发展潜力的电沉积制备硅烷膜技术并提出了展望.     

热化学反应法镁合金陶瓷涂层的制备及性能的影响

采用热化学反应法在镁合金基体上制备陶瓷涂层,并对涂层进行耐磨、耐蚀等性能分析.通过XRD物相分析,涂层中有新相生成.且涂层相对基体耐磨、耐蚀性能均有所提高.     

Effect of the marine environment on reinforced concrete durability in Iberoamerican countries: DURACON project/CYTED

This work presents some of the results from the project: “Effect of the environment on reinforcement durability” (DURACON) in its first two-years period, which investigates the influence of urban and marine meteorochemical parameters on the performance of reinforced concrete structures. The results presented in this investigation are from 21 marine test sites only (no urban environments are included), distributed among 11 countries (Argentina, Bolivia, Brazil, Chile, Colombia, Costa Rica, Mexico, Spain, Uruguay, Portugal and Venezuela). The environment was evaluated using ISO Standard 9223 and the concrete was characterized by measuring compressive strength, elastic modulus, total and effective porosity, chloride permeability according to ASTM standards, as well as the effective porosity and resistance to water absorption using the Fagerlund method. To that effect, concrete specimens (with and without reinforcement) were prepared for electrochemical and physical/mechanical/chemical tests using the existing materials in each participating country, following strict procedures which enabled the preparation of similar concrete samples. Two water/cement (w/c) ratios (0.45 and 0.65) were selected, where the concrete with 0.45 w/c ratio had to have a minimum cement content of 400 kg/m³ and the one with 0.65 w/c ratio a compressive strength of 210 kg/cm². Type I Portland cement, siliceous sand, and crushed rock as coarse aggregates (13-mm maximum nominal size) were used. After a one-year exposure, the results of the corrosion potentiality and probability analysis of the reinforcement in the different test stations showed that, for marine atmospheres, the most aggressive environment to induce steel corrosion was at Portugal’s Cabo Raso station, and the least aggressive one was at Chile’s Valparaíso station. These results are comparable with the ones found using electrochemical measurements, after a two-year exposure.     

精密逆变电阻点焊的应用

首先介绍了精密逆变电阻点焊机系统，包括系统的组成，特点，然后介绍几种典型工件的焊接工艺，结果表明，这种焊机在精密零件 的电阻点焊中有其独持的工艺优势，有很好的推广应用价值。     

工业缝纫机梭床耐磨性研究

分析了缝纫机梭床磨损失效原因。论述了Ni-P化学镀表面技术应用于缝纫机梭床上的可行性。借助扫描电镜、能谱仪、磨损试验机、显微硬度计等设备对化学镀层的表面状态、组织结构及性能进行综合分析。结果表明，Ni-P化学镀层的硬度、耐磨性远远高于碳氮共渗层。其中Ni-P-SiC化学复合镀层的性能最好。同时对化学镀层的高硬度、高耐磨性进行了分析说明。     

铸件表面合金化层性能研究

针对采用水玻璃、树脂等作为粘结剂进行铸件表面合金化时，合金层中容易产生气孔、夹渣缺陷的问题，研究了一种铸件表面合金化新工艺，即加入一种YB成型剂将合金粉末压制成块的方法进行表面合金化，在铸钢ZG65Mn本体表面得到高含Cr、W等元素的合金化层。结果表明，通过消失模铸造工艺，使用YB成型剂较好地消除了水玻璃等粘结剂造成的气孔、夹渣，合金化层和本体之间实现了冶金结合；合金化层具有较好的耐磨性和耐热性能，加入WC后耐磨性可达本体材料的4．82倍，抗氧化性能提高50％左右，且合金化粉末压块放置操作简便、可靠。