基于ZnAl15、Al、AlMg5热喷涂金属涂层为底层、环氧封闭底漆为中间层和丙烯酸面漆为表层的单层、双层和三层复合防腐涂层钢筋与混凝土黏结性能推出试验研究,得到了其对应的位移-应力曲线、黏结强度和破坏特征,结果表明:黏结强度从大到小依次排列为b2>b1>d1>c1>a>c2>d2>b>c>d;ZnAl15+环氧封闭底漆+丙烯酸聚氨酯面漆的黏结强度最大,相对于无涂层提高了8.1％;黏结强度=8 MPa是试样破坏模式发生变化的一个临界值.

为保证钢结构连接与使用的安全可靠,钢结构工程利用其高栓面之间的摩擦力有效控制构件的相对滑动,本文对目前钢结构高栓连接面的增摩涂层技术进行了总结,利用AlMg5合金丝、ZnAl15合金丝或AlMgRe合金丝通过超音速电弧喷涂工艺制备了热喷涂金属涂层的增摩涂层,在保证金属涂层增摩性能的同时,显著提高了整个增摩涂层的防腐效果,结合行业内最新技术研究成果,指出面对钢结构工程市场新的需求,钢结构连接面热喷涂金属涂层增摩技术将成为行业重要的应用与发展方向.

对车站钢结构涂料涂装体系的失效问题进行调研、总结,结合试验研究分析车站钢结构涂料涂装体系失效问题发生的原因,并提出相应的解决措施,为类似车站钢结构工程涂料涂装体系及维修技术设计、施工、质控提供参考.

针对桥梁工程密封涂装存在的相容性问题,根据不同硅烷改性密封胶与面漆的配对试验分析其影响因素,发现面漆中芳香族异氰酸酯固化剂和密封胶中多元醇增塑剂是影响相容性的主要因素.建议优先选用不含异氰酸酯或只含脂肪族异氰酸酯的面漆,以及不含多元醇类增塑剂且中高硬度的硅烷改性密封胶.

设计了不同前处理清洁度等级的钢板,并模拟桥梁工程涂装维修工况,用环氧底漆和低表面处理环氧底漆分别制备了标准试样、模拟锈蚀试样、模拟维修试样及模拟维修时返锈试样,采用划格法及拉开法测试了盐雾试验前与盐雾试验144 h和240 h后涂层的附着力,分析了不同试样的附着力变化情况.结果表明,维修涂装前处理清洁度对涂层的附着力有明显影响.St3级试样的涂层附着力显著优于St2级试样,划格法附着力评级提升1个等级,破坏强度普遍提高30％.在盐雾试验过程中,St3级试样涂层的破坏强度比St2级试样涂层高70％以上,St2级试样涂层的失效速度显著大于St3级试样涂层.

以超支化聚酯CYH-277制备了一种改性无溶剂环氧涂料.经检测,其黏度低,涂层性能良好.用它及现有的环氧清漆、水性环氧地坪底漆、硅烷分别对混凝土试块进行维修涂饰,对比了渗透深度、吸水量比、抗Cl?渗透、抗压强度等性能.结果表明,超支化聚酯改性环氧涂层渗透性好,抗吸水、抗Cl?渗透的能力突出,对混凝土基体有良好的保护作用.由于该双组分涂料活性高,适用期只有8～10 min,因此必须快混快用,优先采用枪外混合喷涂作业模式.

针对硅烷改性密封胶涂装配套工程的悬索桥主缆出现的涂层开裂问题,对市场现有的密封胶与面漆配套性进行分析.研究结果表明:采用芳香族类增塑剂和功能助剂B能改善密封胶与面漆的配套性.通过对改进的MS(硅烷改性聚醚)密封胶样品进行试验测试,其中采用芳香族类增塑剂和功能助剂B的1-3#样品,各项性能都明显优于目前市场上通用的MS密封胶,力学性能指标、耐高温老化指标及涂装配套检测结果完全符合要求,该研究成果可向悬索桥主缆密封防护工程推荐使用.

制备了PVC波纹管,按照JT/T 529—2016测试了其主要性能,并与HDPE波纹管进行了比较;对PVC波纹管进行了热失重试验、浸泡试验和环境模拟加速试验.结果表明:①PVC波纹管的基本性能满足JT/T 529—2016的要求,且优于相同规格、壁厚的HDPE波纹管;②PVC波纹管在210℃以下时热失重<0.5％,性能稳定可靠;③PVC波纹管在40℃去离子水中浸泡90天的过程中无Cl-析出;④5000 h环境模拟加速试验过程中,PVC波纹管内外侧20 mm范围内无Cl-析出.

The protective properties of arc spraying metal coating and composite coating were studied by using the electrochemical resistance, neutral salt spray, hygrothermal and artificial accelerated aging test method. This article provides a reference for the design and application of arc spraying metal composite coating system.

电弧喷涂Zn,Al及其合金涂层应用广泛,但不同喷涂层体系防腐蚀性能的优劣一直争议不断,有必要对各喷涂层的防腐蚀性能进行更加细致的分析.采用电弧喷涂技术在Q235钢表面喷涂了Al,ZnAl15,AlMg5及Zn+ Al双丝涂层.研究了4种喷涂层在3.5％NaCl(质量分数)溶液中的耐浸泡腐蚀性能及电化学行为,用扫描电镜和X射线衍射仪分析了喷涂层表面组织形貌及腐蚀产物的形貌及相结构.结果表明:Al,ZnAl15,AlMg5喷涂层中各成分分布较均匀;Zn+ Al双丝伪合金喷涂层中有纯Zn、纯Al和Zn-Al合金微区,各微区成分不均匀易导致选择性腐蚀或形成微电池;阳极金属涂层阴极保护作用由高到低依次为ZnAl15＞Zn+Al＞AlMg5＞Al,耐蚀性优劣依次为ZnAl15＞AlMg5＞ Al＞ Zn+ Al.

It is inexhaustible of the marine green energy,however,the anti-corrosion is the key to make sure the offshore projects have a long-term operation,especially in the harsh marine environments.The classification and the using form of the marine renewable energy was stated in this article,and also the the advantage of the offshore wind power was introduced.The importance of the marine environment corrosion phenomenon and the importance of anti-corrosion was expounded.and the five kinds of common marine engineering anticorrosion methods were introduced.

硅烷涂装各种环境中的混凝土表面能显著提高混凝土结构的使用寿命.总结了混凝土硅烷涂装防护技术的应用现状,针对目前存在的碳化加深、裂缝防护不成熟、耐老化不理想等问题进行了分析并提出了改进意见,指出今后应进行一步加深硅烷浸渍+涂料涂层复合涂装的机理及应用研究.

This article has analysis the arc spraying coating, corrosion potential, corrosion current by electrochemical measurement method, and then compare them to the matrix metal sacrificial anode protection and corrosion performance,the reference will be provide for design of long-lasting anti-corrosion composite coating on steel structure.

This paper introduces the research and application of wet cured coatings.The existing problems are discussed and some suggestions are proposed for wet cured coatings as well.Wet cured protection technology applied on reinforced concrete surfaces in tidal zones has broad prospects.

The addition of rare earths as trace elements in aluminum and aluminum alloys does not only refine the grains but also purifies the melt,reduces the gas and inclusions contents in them so as to improve the comprehensive properties of aluminum and aluminum alloys.The mechanism of RE in aluminum and aluminum alloys was discussed,the current situation of development and application of RE in this area was expounded,and the future development of RE aluminum alloys was prospected.

This article introduced the design of silane impregnation & wet surface curing complex coating program used in tidal range area concrete coating protecting based on investigate and survey and experiment, and better protective effect were got in the field test. The painting matching design program of reinforced concrete works in Jiashao Bridge was formed on this foundation.

Al-Mg and Re-Al-Mg coatings are prepared on Q235 steel surface by arc spraying technology.The corrosion resistance of Al-Mg and Re-Al-Mg coatings was studied respectively.The neutral salt spray test and electrochemical test have been used to study the corrosion resistance of the two coatings,and the microstructure of Al and Re-Al-Mg coatings before and after corrosion were analyzed by scanning electronic microscope.Then,the structure and anticorrosive mechanism are analyzed.The results show that there is a clear passive phenomenon of two kinds of coatings in the polarization process,and a layer of oxide film on the coating surface in the process of corrosion is generated,it is a physical shield which can delay the corrosion rate of coating,but the corrosion resistance performance of Re-Al-Mg coating is better than Al-Mg coating obviously,it's because by the rare earth elements added,it reduces the porosity of the coating,increasing the hardness of the coating and the bond strength with substrate,resulting in a coating with good corrosion resistance.

Main cables are the chief bearing components of suspension bridges. In order to ensure the safe service life of the suspension bridges, the cables must be specially painted. This paper deals with experiments and application of painting technology for main cables of suspension bridges.

In the past half century,China has developed and formed system of Ni-based superalloys for power,transportation,aviation and aero-space industries,especially,the development of Ni-based superalloys has made the significant contribution to improving the properties of aeronautical engines greatly for our country.The development process of Ni-based superalloys is simply introduced,then the research progress about the Ni-based superalloys is summarized,and finally the application and development trend of Ni-based superalloys are discussed.

The durability test method,inspection and evaluation method,and research development of the metal thermal spraying coating were introduced.The existing research application results,the existence controversy were summarized and analyzed,the existence question of detection technology were discussed and expect to achieve new technology progress.