渗入固结型混凝土防腐涂料的研究

混凝土具有多孔结构,水和离子可通过混凝土的孔隙渗入于混凝土内部,对混凝土造成腐蚀。以环氧树脂和糠醛/丙酮制备了渗入固结型混凝土防腐涂料 (PSEp),其中糠醛/丙酮混合物为反应性溶剂。制得的涂料具有优异的润湿性能,能够渗入砂浆固结体(水灰比为0.5)的孔隙中并原位交联 (渗入深度可达4.0 mm),从而对混凝土孔隙进行封闭。该涂料渗入混凝土后与之形成复合增强层,其粘附力(拉拔强度)比混凝土提高130%。同时,混凝土表面抗离子渗入能力提高,其电通量从3 400 C下降至130 C。因此,该涂料可有效用于混凝土防腐。     

石墨烯涂料在岛礁环境车辆上的应用研究

通过石墨烯重防腐涂料的配方设计、石墨烯分散工艺技术研究以及性能研究,对石墨烯重防腐涂层进行了设计并对其应用进行了评价,分析了石墨烯重防腐涂料相较传统富锌防腐涂料的特性与优势。从石墨烯重防腐涂料的结构特点出发,探讨了石墨烯重防腐涂料的腐蚀防护机理,并针对车辆在岛礁使用环境特点提出了新型重防腐涂料体系配套方案。对配套方案的腐蚀防护性能进行评估,结果表明以石墨烯为基础的重防腐涂层体系腐蚀防护性能远优于以传统环氧富锌涂料为基础的重防腐涂层体系。新型石墨烯重防腐涂料体系满足岛礁车辆腐蚀防护的需要。     

海洋环境钢筋混凝土腐蚀机理和防腐涂料研究进展

海洋钢筋混凝土防腐涂料可以延缓海洋环境中的盐害、中性化和冻害对钢筋混凝土的腐蚀,成为海洋混凝土防腐工程中最有效、最经济的措施.系统阐述了海洋环境钢筋混凝土腐蚀机理、钢筋混凝土表面涂层防腐措施与其他防护措施的比较,以及钢筋混凝土表面涂料的国内外发展状况.     

石墨烯基自修复防腐涂层的研究进展

表面涂覆防腐涂层是延缓基材腐蚀的有效措施，但由于外部因素和内部因素的综合作用，涂层表面难免会出现磨损、划痕和微裂纹等。涂层的微裂纹容易加速基材腐蚀，进而导致涂层的大面积失效，大大缩短涂层的保护寿命。自修复防腐涂层因能主动修复微裂纹，延长涂层的保护寿命，受到业界广泛关注。本文简要概述了二维石墨烯材料在自修复防腐涂层领域的应用，总结了外援型自修复防腐涂层和本征型自修复防腐涂层在防腐领域的优缺点，并详细介绍了各类自修复涂层的组成和自修复机理。针对当前石墨烯基自修复防腐涂料存在的问题展望了其发展方向。     

金属防腐自修复涂料的发展

金属表面涂覆防腐涂层是目前普遍采取的用于保护金属制品腐蚀的有效措施。防腐涂层表面有时会出现一些细小的肉眼看不到的微裂纹,这些微裂纹会降低涂层的保护寿命。因此,具有一定自修复能力的智能型涂料得到了学术界以及工业界的广泛关注。文中阐述了金属防腐自修复涂料的重要性、发展现状、涂料种类以及未来发展方向。重点对微胶囊型自修复涂料、高聚物型自修复涂料和负载缓蚀剂型自修复防腐涂料的自修复机理进行了探讨,并指出自修复智能防腐涂料的发展方向。     

新型聚苯胺防腐涂料的研究进展

综述了近年来聚苯胺(PANI)防腐涂料的研究进展,包括单一PANI防腐涂料、PANI叠层防腐涂层和PANI与树脂共混防腐涂料。介绍了无机纳米粒子、有机酸等对PANI的改性,分析讨论了PANI涂料的防腐机理,展望了PANI防腐涂料的发展方向。     

海洋防腐涂料的研究进展

介绍了海洋腐蚀的特点和海洋防腐的机理以及海洋防腐涂料的种类。综述了国内外海洋防腐涂料的发展状况和发展趋势。     

军事装备腐蚀现状及对策

简述了军事装备腐蚀及防腐蚀的现状，并论述了大气腐蚀、海水腐蚀和联合腐蚀的特点。着重介绍了高速电弧喷涂长效防蚀技术、纳米电刷镀防腐耐磨涂层技术，非晶态合金化学镀层防腐技术、纳米固体薄膜减摩防腐技术和纳米防腐涂料及涂装技术。提出了腐蚀防护工作重点，介绍了国家对腐蚀防护的策略。     

油气井CO_2腐蚀主控因素及对策分析

高温高压高浓度CO_2介质下油气井管具腐蚀问题日趋严重,针对此问题,本文重点分析了CO_2腐蚀的主控因素及防腐对策。基于CO_2腐蚀环境主控因素、腐蚀类型,腐蚀机理及腐蚀评价方法,总结认为,CO_2分压、温度、流速是CO_2腐蚀的主要影响因素,且在有水的下,CO_2分压对腐蚀速率的影响最大,其次是温度,流速影响最小。防腐主要需通过缓蚀剂防护、涂层防护、化学镀层等措施来实现,咪唑啉类缓蚀剂、噻唑类缓蚀剂和硫脲类缓蚀剂具有很好的缓蚀效果,涂层防护主要包括环氧树脂防腐涂料、聚氨酯防腐涂料、聚苯胺防腐涂料、高固体分防腐涂料四种,也可以采用镍磷合金镀管或双层镀管的方法进行防护。     

水性防腐涂料研究进展

综述了近年来水性环氧树脂(WEP)防腐涂料、水性聚氨酯(WPU)防腐涂料和水性丙烯酸酯防腐涂料等新型水性防腐涂料的研究进展。介绍了树脂、聚苯胺(PANI)以及纳米粒子等对水性防腐涂料的改性方法,改性剂通过增强涂层的交联密度,减少腐蚀性离子的渗入,提供屏障保护,从而提高涂层防腐性,其中纳米粒子的改性和多种树脂的复合改性还可以提高涂层的机械性能、热稳定性、耐水性等综合性能;总结了水性防腐涂料目前存在的问题,展望了水性防腐涂料的发展方向。     

钢筋混凝土结构的腐蚀与涂层防护

分析了钢筋混凝土结构腐蚀的原因，介绍了防止钢筋混凝土结构腐蚀的涂料涂装，阐明了采用涂层防护对提高混凝土结构寿命的重要意义。     

埋地钢管外防腐复合涂层的生产工艺

介绍了三层聚丙烯外防腐,描述了其施工工艺和涂覆技术;在炎热地带或输送介质温度较高时,三层聚丙烯外防腐是理想的首选涂层体系,具有较广泛的应用前景。     

工业卷钉用防腐蚀涂料及其在涂装线中的应用

介绍了工业卷钉的生产工艺流程及其表面处理的涂装线。研究了工业卷钉用防腐蚀涂料的无芳香烃稀释剂的配方设计及其在涂装线中的应用     

在役甲醛储罐的涂装

阐述了目前国内外耐候防腐涂料的应用情况，结合工程实例着重介绍了在役甲醛储罐外壁用的耐候防腐涂料体系，并列举了涂料配方。使用结果表明，该配套涂料体系具有良好的防腐性能。     

Preparation of polyvinylpyrrolidone/graphene oxide/epoxy resin composite coatings and the study on their anticorrosion performance

Waterborne epoxy resin (EP) is often used as anticorrosive coating in the industrial field. However, small holes and gaps can be formed during the curing process. The corrosive medium easily penetrates the anticorrosive coating and corrodes the metal matrix. Herein, polyvinylpyrrolidone (PVP) and graphene oxide (GO) were doped into EP to improve the shielding and resistance to corrosive media. The composite coatings were prepared successfully by solution blending method. In the PVP/GO composite materials, original spatial structure of GO was changed and the composite was mainly combined by covalent bonding. The surface morphology of hybrid filler was flat and uniform, and the structural defects of GO was reduced. Compared with single-layer anticorrosive coating, the corrosion potential of PVP/GO/EP coating moved forward and the corrosion current density decreased. The ideal corrosion resistance of PVP/GO/EP composite coatings was mainly because agglomeration of GO sheet was obviously avoided after it was modified by PVP. Furthermore, the hybrid filler can be uniformly dispersed in the aqueous EP. It blocked the gaps and holes inside the coatings, which could contribute to form anticorrosive coatings.     

水性漆在汽车铝合金零部件上的应用研究

介绍了一种适用于汽车铝合金零部件的水性涂料,通过耐盐雾测试对比了不同涂料体系在铝合金上的防腐蚀性,同时探讨了膜厚、固化温度、助剂的选择对涂料耐腐蚀性能的影响。试验证明,新开发的水性双组分环氧涂料性能完全达到或超过现有溶剂型PU涂料。     

Aliphatic polyurethane–montmorillonite nanocomposite coatings: Preparation,characterization, and anticorrosive properties

Polyurethane (PU)–clay nanocomposite coatings were prepared by a sonication method. The stability and morphology of these coatings was characterized by turbidometry, X‐ray diffraction, and transmission electron microscopy. The anticorrosive properties of these coatings were investigated by salt‐spray and electrochemical impedance spectroscopy methods. According to the results, dispersed nanoclay layers in the matrix of the nanocomposite coating compositions led to superior anticorrosive characteristics compared to those of pure PU coatings. The best results were obtained with coatings containing about 5 wt % clay. The resistance of the coating containing 5% clay was about 9.002 GΩ after 225 days of immersion in a 3.5 wt % NaCl solution, whereas it was only 97 kΩ for the pure PU coating. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

混凝土用防腐涂料检测中常见问题的探讨

结合笔者多年检测经验,阐述了常见的混凝土用防腐涂料,重点围绕JTJ275-2000《海港工程混凝土结构防腐蚀技术规范》,探讨相关防腐涂料在检测过程中的常见问题,以供实践参考。     

Anticorrosion reinforcement of waterborne polyacrylate coating with nano-TiO2 loaded graphene

Photocathodic protection coatings have been widely applied in various areas such as ship and architectural protection, or chemical industry. In this work, a composite of titanium dioxide loaded with reduced graphene oxide (RGO/TiO₂) was prepared and used as filler on waterborne polyacrylate (PA) coating to reinforce the metal protection against corrosion. Compared with the current filler of zinc phosphate used for anticorrosive coating, the photoelectrochemical properties of RGO/TiO₂-PA coating exhibit improved photocathodic protection under visible light illumination since RGO/TiO₂ composite has significant superiority in enhancing metal protection due to its dispersion, micropore blocking ability, and photoelectrochemical conversion performance. The mechanism of anticorrosion reinforcement of RGO/TiO₂-PA coating was hypothesized that graphene provides an extrabarrier layer to obstruct corrosive in dark condition and photocathodic protection under lighting. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48733.