聚苯胺防腐蚀涂料研究进展

介绍了聚苯胺防腐涂料的研究进展及不同的防腐机理.综述了聚苯胺掺杂态和本征态的防腐性能,以及不同涂层体系的防腐性能.     

聚苯胺电化学性能的改性研究

改善聚苯胺的电化学性能是聚苯胺研究中的一个重点，介绍了对聚苯胺的取代，共聚，复合和掺杂等几种改性方法，及其对聚苯胺电化学性能和其他性能的影响。     

聚苯胺型防腐涂层制备方法研究进展

聚苯胺涂料具备优异的防腐性能,在金属防腐领域应用前景广阔。本文从聚苯胺的结构和性能出发,综述了聚苯胺型防腐涂层制备方法的发展,指出复合法是聚苯胺防腐涂层制备技术未来发展的主要趋势,最后对聚苯胺型防腐涂层制备技术的研究方向进行了展望。     

电化学活性高聚物材料聚苯胺及其进展

对具有电化学活性的高聚物聚苯胺研究现状和进展进行了概述,着重介绍了聚苯胺的合成方法,结构特征与导电机制,电化学特性及潜在的应用前景。     

不同电化学方法对聚苯胺结构及其防腐性能的影响

采用常规脉冲伏安法和线形扫描伏安法在不锈钢电极表面制备纳米纤维状聚苯胺膜.红外光谱分析表明,不同电化学方法对聚苯胺的化学结构没有明显影响.扫描电子显微镜及X射线衍射分析表明,与采用线形扫描伏安法相比,常规脉冲伏安法制备的聚苯胺膜呈现较为均匀的纳米纤维结构,且结晶度更高.电化学分析表明,不同方法制备的聚苯胺膜都可提高不锈钢表面的防腐性能.     

聚苯胺纳米纤维在电化学电容器中的应用研究

电化学电容器具有高功率、高容量的性能，引起了人们的广泛关注。本研究采用电化学法，在不锈钢电极上沉积聚苯胺纳米纤维。通过扫描电镜（SEM）观测了电极表面聚苯胺的形态。研究了修饰电极的循环伏安特性，并考察了聚合物膜厚度和循环伏安扫描电位范围对修饰电极比电容的影响．     

聚苯胺复合电极的制备及电化学性能研究

以化学法合成导电聚苯胺，研究了氧化剂和掺杂剂以及反应温度和时间对聚苯胺的产率和电导率的影响。在确定的配方和工艺条件下，聚苯胺的合成产率为94％，电导率在5.6S/cm，将合成得到的聚苯胺掺杂导电粉体制备成高分子是合电极材料，在恒电流上进行充放电性能测试。结果表明，开路电位和放电电位较高，在以4mA/cm^2恒电流放电，终止电位为1．2V时，放电时间可持续16.5h，放电容量大。     

聚苯胺导电复合膜电化学制备及其性能

采用电化学氧化聚合法,以硫酸和高氯酸为掺杂剂,制备出聚苯胺（PANI）/聚乙烯醇（PVA）导电复合膜,在此复合膜上再沉积一层很薄的银层,制备出具有高导电性的复合膜。研究了苯胺聚合时间、银沉积电流密度及银沉积时间和拉伸处理对复合膜电导率的影响。采用扫描电镜、X射线衍射对复合膜进行表征,并对复合膜导电机理进行解析。结果表明制备的PVA-PANI复合膜电导率可达4.2S.cm-1,再经沉积薄层银后,其电导可显著提高至1136 S.cm-1。最优条件下制备的PVA-PANI复合膜为纤维状,银在此复合膜上沉积呈针状;PVA-PANI复合膜具有一定的结晶度,经拉伸后,其结晶度增大,复合膜电导得到提高,PVA-PANI复合膜具有良好力学性能。复合膜导电的基本原理是PANI与PVA互穿网络,并与银形成了三维导电网络。     

聚苯胺纳米纤维的制备与电化学性能

以苯胺为单体、樟脑磺酸为掺杂剂,采用水热法制备了聚苯胺纳米纤维。利用红外光谱、X射线衍射、扫描电镜和透射电镜对聚苯胺进行了结构和形貌表征。在1 mol/L H2SO4电解液中,采用循环伏安、恒流充放电及交流阻抗等测试技术,对聚苯胺的电化学性质进行了研究。结果表明,成功合成了直径约为50 nm~80 nm的聚苯胺纤维;当电流密度从0.5 A/g(486 F/g)增大到2 A/g(363 F/g)时,聚苯胺的比电容仍达到363 F/g,比电容保持率为74%,并且表现了出较小的内阻。可见,制备的聚苯胺纳米纤维具有较高的比电容和良好的倍率特性,在电化学电容器中有潜在的应用价值。     

导电聚苯胺在化学及电化学传感器中的应用

本文扼要综述了聚苯胺在化学传感器 (气敏电极 )及电化学传感器 (离子检测和生物传感器 )领域的主要应用。     

Zn2+掺杂对电化学合成聚苯胺膜耐蚀性能的影响

为提高聚苯胺（PANI）膜的耐蚀性,在苯胺-硫酸电解液体系中,采用电化学恒电流法在不锈钢表面合成了PANI膜,利用电化学测试技术、SEM和XRD研究了Zn²⁺掺杂对电化学合成PANI膜耐蚀性能的影响。结果表明：Zn²⁺的掺杂使PANI膜微观形貌由不规则片状转变为规则的纤维状形貌;掺杂改性后PANI膜的交流阻抗明显增大,腐蚀电位向正方向移动,腐蚀电流减小;掺杂Zn²⁺的PANI膜经质量分数为10% 的HCl点滴实验测试,腐蚀时间达320 s;经中性盐雾实验48 h后,PANI膜未见锈蚀。     

乙二醇在制冷系统中的腐蚀及防护研究

介绍乙二醇的物理化学性质,以及作为载冷剂在制冷系统中的应用情况,举例说明乙二醇溶液在制冷系统中的腐蚀现象,对其形成原因进行深入分析,提出添加缓蚀剂等防护措施。     

Double corrosion protection mechanism of molybdate-doped polypyrrole/montmorillonite nanocomposites

Nanocomposites based on polypyrrole (PPy) doped with molybdate (PPy(MoO₄)) and montmorillonite (MMT) were prepared by chemical polymerisation. The morphology of nanocomposite particles was studied by scanning electron microscopy. The chemical structure of conducting polymers (CPs) in nanocomposites was characterised by Raman spectroscopy. The thermal analysis showed that all CPs in the nanocomposites were stable for more than 500°C. Energy diffraction X-ray showed that the amount of Mo in element the PPy(MoO₄)/MMT nanocomposite was 5.55%. The corrosion protection mechanism of the nanocomposites was investigated by electrochemical methods, showing that MMT acted as a barrier layer in nanocomposite and molybdate as an inhibitor for corrosion protection of metal.     

不锈钢表面电化学合成导电聚苯胺膜的研究

在酸性电解液中分别用电化学恒电位法和恒电流法在不锈钢基材上成功制备了导电聚苯胺膜，该膜在空气中呈绿色，稳定、完整致密，为结晶态结构，与基体的结合情况较好。在氯化钠溶液中测定试样的阳极极化曲线后发现，表面覆盖聚苯胺膜后的不锈钢，其点蚀电位比无膜时升高1000mV左右，表明导电聚苯胺膜可显著提高不锈钢的抗点蚀性能，具有良好的点腐蚀防护效果。     

极地钢铁材料的腐蚀与防护面临新挑战

随着极地的开发和利用,其所需的极地钢铁材料的腐蚀与防护问题越来越受到研究者的关注。本文以传统海洋环境腐蚀分区为参照,对极地特色的腐蚀环境进行了系统的分析,并将其归纳整理为极地大气区、极地冰水磨蚀区、极地海洋全浸区、极地海底泥土区等4个腐蚀区域。在对极地钢铁材料腐蚀与防护的研究进展进行梳理的基础上,从合金化、涂层技术和阴极保护技术3个方面介绍了极地钢铁材料的防护技术,并指出了极地钢铁材料未来研究的方向。     

用于腐蚀与防护的导电聚苯胺研究新进展

介绍了聚苯胺作为一种镀覆物用于金属防腐蚀的国内外按期研究成果,比较了聚苯胺涂层在不同环境中的性能。     

Fabrication of superhydrophobic surfaces for corrosion protection: a review

ABSTRACT

Steel, aluminium and magnesium are important engineering materials owing to their excellent mechanical properties. However, their applications are limited due to inadequate corrosion resistance. Various coatings and improvement technologies are used to enhance the corrosion resistance in industry and consumer products. Fabrication of hydrophobic surfaces is a very interesting approach to anticorrosion in that it is derived from the superhydrophobicity found in nature. This paper is a general review of the methods to construct a superhydrophobic surface, i.e. a thin coating layer, on various metallic materials surfaces to enhance their anticorrosion property, providing an introduction of the superhydrophobicity, including theory, properties and fabricating methods. Different methods including spray technique, laser ablation, electrochemical deposition, micro-arc oxidation and etching routes were discussed.     

Trends in corrosion protection of materials

The rapid advances in technologies in various fields have also recorded significant progresses in the field of newer materials as the reliability and effective performance of industrial equipment as well as the associated components mostly depend upon their integrity over specified period. Though the basic methods of protection of materials like use of corrosion-resistant alloys, application of surface coatings, modification of the environment and application of cathodic protection have largely remained the same, the approaches and techniques adopted in each of these fields have been so advanced that one could today advocate appropriate protection systems with high reliability and performance. The author presents some of his contributions along with his colleagues in the fields of cathodic protection of vital structures, development of newer coatings for specific applications and new approaches to corrosion monitoring techniques, besides highlighting the corrosion behaviour of some of the heat-treated alloys which are specifically used in such strategic areas as space and defence. The presentation would also cover briefly some of the techniques that have been employed by the author for better understanding of corrosion and passivation of metals and alloys.