长输埋地管道聚脲防腐涂层的应用研究

阐述了目前钢质埋地管道防腐涂层的种类和应用现状,分析了各自的优劣性。介绍了新型埋地管道防腐和补口材料用聚脲涂料,针对管道防腐涂层的技术要求,研究了聚脲涂层的力学性能、耐腐蚀性能以及耐老化性能。研究结果表明,聚脲具有优异的施工性能和防腐性能,适用于管道防腐和补口涂装。     

常温固化氟碳涂料防腐涂层配套体系及施工质量控制(一)

常温固化FEVE氟碳涂料以其优异的耐候性能在防腐领域获得越来越广泛的应用.为充分发挥氟碳涂料的耐候性,实现涂层体系的长效防腐,必需进行合理的涂层配套体系设计和严格的施工质量控制.综述了氟碳防腐涂层体系设计的一般原则和施工质量控制.介绍了ISO 12944、JT/T 722等标准在氟碳防腐涂层体系设计中的应用,归纳了不同腐蚀类型下,长寿命防腐氟碳涂层体系的实例及特点.     

天然气长输管道和站场防腐涂层

介绍了天然气长输管道和站场的腐蚀防护,国内长输管道外防腐涂层的种类、性能和应用历史,目前天然气地面长输管道和站场工程中的防腐涂层应用、施工规范和技术要求。     

功能型环氧树脂基防腐涂层的研究进展

环氧树脂涂层因其优异的耐蚀性能、对金属表面良好的附着力而在金属防腐领域得到广泛应用。但涂层固化过程中会形成缺陷和孔洞，腐蚀介质可以直接接触到金属表面。为了开发出具有优良耐久性的防腐涂层，研究人员使用不同的方法和材料制备了多种环氧树脂防腐涂层。该文综述了纳米粒子改性环氧防腐涂层、超疏水型环氧防腐涂层、自修复型环氧防腐涂层、导电聚合物改性环氧防腐涂层及生物基材料改性环氧防腐涂层的制备及性能。但这5种防腐涂层各有局限性，未来应该探究出新的环氧防腐涂层，在提升涂层防腐性能的同时，兼顾其他性能，使环氧树脂基防腐涂层朝着功能化、智能化的方向发展。     

导读

正王军阐述了钢质埋地管道防腐涂层的种类和应用现状,分析了各自的优劣性。介绍了新型埋地管道防腐和补口材料用聚脲涂料,针对管道防腐涂层的技术要求,研究了聚脲涂层的力学性能、耐腐蚀性能以及耐老化性能。研究结果表明,聚脲具有优异的施工性能和防腐性能,适用于管道防腐和补口涂装。宋宇书等使用不同人工加速老化条件去观察有机荧光涂料的变化,了解不同光源下的影响度,进而开发出有机荧光涂料用高效能光稳定剂Eversorb~FC1和FP1。江拥等对碳纳米管如何应用于轨道交通领域的水性防腐涂     

锌铝合金涂层与有机涂层的耐盐雾腐蚀性能对比研究

研究了锌铝合金涂层与有机涂层的耐盐雾性能,在防腐涂层体系中,锌铝合金涂层的耐盐雾防腐性能好于有机涂层;而在防腐防污涂层体系中由于防污漆含有铜,锌铝涂层与铜离子可形成原电池加速腐蚀,锌铝合金涂层的防腐性能差于有机涂层体系。     

锌铝伪合金与氟碳涂料的复合涂层在西安灞河桥上的应用

电弧喷涂锌铝伪合金是一种涂层结合牢固、气孔率低、耐蚀性好的长效防腐工艺;氟碳涂料性能优异,涂层具有良好的耐候性和长效防腐性,两者的复合涂层已在西安灞河桥主桥钢结构防腐中得以成功应用。概述了锌铝伪合金涂层的特点,介绍了灞河桥的基本情况和使用环境,以及主桥钢结构的防腐蚀涂层方案、施工情况和应用成果。     

AZ31镁合金表面防腐胶粘涂层的研制

胶粘涂层法是有效提高镁合金耐腐蚀性能的表面处理技术之一.以E-44环氧树脂、低分子量650#聚酰胺、云母氧化铁等为主要原料,制备了适用于AZ3l镁合金基体的防腐胶粘涂层.研究了填料含量对涂层外观、施工性和耐蚀性能的影响.结果发现,当填料质量分数为60%、涂层厚度为180～220μm时,防腐胶粘涂层具有良好的外观及施工性,附着力为1级,耐盐雾时间168 h.     

钢顶管工程外防腐技术的研究与应用

钢顶管外防腐因顶进过程涂层摩擦、难以修补而具有独特要求,该文综合比较环氧煤沥青涂层、环氧玻璃鳞片涂层和熔结环氧粉末涂层这三种涂层的性能,价格,施工要求等因素,选用熔结环氧粉末涂层作为南汇支线钢顶管外防腐涂层;经过工程的验证,此材料的选用可以提高钢顶管防腐涂层的质量和适用性,保障工程的安全运行。     

环氧——聚氨酯防腐涂料和涂层施工技术成功应用

大港油田承担的中国石油股份公司科研项目“快速固化防腐涂层应用研究”，通过专家验收评定。专家组认定，该产品质量性能达到国际同类产品标准，填补了国内防腐涂料领域的一项空白。据中国环氧树脂行业协会专家介绍，该项目的主要内容是研究和开发100％固体含量刚性环氧树脂一聚氨酯防腐涂料及其涂层施工技术，具有无毒无公害、施工工艺方法简便快捷、涂层防腐性能优异等特点，并具备多种防腐涂层的技术优势。     

常温固化环氧改性有机硅耐高温涂料的研制

用环氧树脂E-20和有机硅低聚物（PS）合成了一种环氧树脂改性有机硅树脂,采用红外光谱（IR）、热失重分析（TGA）等方法对产物进行了表征和分析。探讨了有机硅含量对涂料耐热性能的影响,优选了综合性能优良的固化剂和颜填料制得了耐高温涂料,同时对涂膜性能进行了测试。结果表明,当m（E-20）：m（PS）=2：8时,改性有机硅树脂的综合性能得到了明显改善。采用改性芳香胺固化剂,硅烷偶联剂KH550以及适当的颜填料制备的涂料具有良好的耐热防腐性能,可常温固化,能在500℃环境下长期使用。     

Development and characterization of silicone/phosphorus modified epoxy materials and their application as anticorrosion and antifouling coatings

Epoxy resin is chosen for our present study owing to its exceptional combination of properties such as easy processing, high safety, excellent solvent and chemical resistance, toughness, low shrinkage on cure, good electrical, mechanical and corrosion resistance with excellent adhesion to many substrates. This versatility in formulation made epoxy resins widely applied for surface coatings, adhesives, laminates, composites, potting, painting materials, encapsulant for semiconductor and insulating material for electric devices. There are numerous paint/coating systems based on epoxy resin available for corrosion and fouling prevention. They however are not completely satisfactory in field applications, where high corrosion, fouling and flame resistance are required. The demand for epoxy resin as corrosion/fouling resistant coatings is restricted mainly due to its inferior characteristics like poor impact strength, high rigidity, and moisture absorbing nature besides inadequate flame retardant properties. It is for this reason that silicones and phosphorus-based compounds are used as modifier in this work by intercrosslinking network mechanism (ICN) to obtain epoxy resin with desired properties ideally suitable for field applications for preventing corrosion and fouling with flame retardantancy. The present work involves the development of solvent free silicone/phosphorus modified epoxy coating systems, since solvent free coating systems are widely used for numerous applications due to their lower cost per unit film thickness, freedom from fire and pollution hazard and ability to provide better performance. For the development of coating systems, epoxy resin (X) serves as base material, hydroxyl terminated polydimethylsiloxane (HTPDMS) as modifier, γ-aminopropyltriethoxysilane (γ-APS) as crosslinking agent and dibutyltindilaurate (DBTDL) as catalyst. Polyamidoamine (A), aromatic amine adducts (B) and phosphorus-containing diamine (C) were used as curing agents. The study also describes the evaluation of corrosion resistant behaviour of unmodified epoxy and siliconized epoxy coatings by potentiodynamic polarization method, electrochemical impedance spectroscopy (EIS), salt-spray and antifouling tests. The results are discussed.     

Furan resins as replacement of phenolic protective coatings: Structural,mechanical and functional characterization

Phenolic coatings are usually a convenient and economical way to protect metallic materials against wear and corrosion. Furan resins are analogous to phenolics, as they are obtained by replacing formaldehyde by furfural in their formulation. In this work, a furan resin based on furfural and phenol was synthesized and used as an aluminum coating. Thus, toxic emissions of formaldehyde were avoided, while a biobased derivative was used instead. The performance of the proposed resin was compared with the one of a traditional phenolic resin. Physicochemical characteristics including chemical structure, surface polarity and glass transition temperature were evaluated by means of Fourier transform infrared spectroscopy, contact angle measurements and dynamic–mechanical analysis, respectively. Nanomechanical and nanotribological properties were assessed by depth sensing indentation techniques. As well, the corrosion resistance of the furan coating was determined by potentiodynamic polarization tests. The obtained results validate the furan resin as a feasible alternative to phenolics to protect aluminum.     

Positive effect of the addition of polyaniline on the anticorrosive property of polyethersulfone two-layer composite coating

In order to prepare a coating with better corrosion resistance, the double-layer coatings are designed to work together in this article. The double-layer coatings are made of polyethersulfone and epoxy resin as the matrix resin. Polyaniline (PANI) of different contents was added to the matrix resin by weight to form the primer coats, which was named as d-0, d-20, d-40, d-60. And polytetrafluoroethylene was introduced into the matrix resin to prepare the surface coats. A two-layer coating was prepared by coating the surface layer on the primer layer, named as S-0, S-20, S-40, S-60. The surface morphology of the primer coatings and the cross section morphology of the two-layer coatings were determined by field emission scanning electron microscopy. The anticorrosion property of the coatings was studied by water absorption, adhesion, salt spray corrosion acceleration test and electrochemical impedance test. The results indicate that the 40 wt% PANI composite coating shows the best corrosion resistance.     

Anticorrosion epoxy coating enriched with hybrid nanozinc dust and halloysite nanotubes

In this study, the performance of an epoxy coating with hybrid nanozinc dust and halloysite nanotube (HNT) fillers on the corrosion protection of a carbon steel substrate was investigated. The epoxy resin was mixed with a constant amount of nanozinc dust (1%) and different contents of HNTs (0, 0.5, 1, and 1.5%) with a high speed mixer. Fourier transform infrared spectroscopy and thermogravimetric analysis were used to analyze the interactions between the components in the coating material and the thermal stability of the epoxy coating, respectively. Open‐circuit potential, salt spray testing, and microscopy were also used to assess the corrosion resistance of the carbon steel substrate coated with these coating materials. The incorporation of nanozinc in the epoxy coating enhanced the corrosion protection of the carbon steel substrate compared with the pure coating. Furthermore, HNTs further enhanced the corrosion protection. The best protection was achieved when 1% nanozinc and 1% HNT were used. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 955‐960, 2013     

Fabrication of poly(vinylidene fluoride)-based composite powder coating with enhanced adhesion performance

Given the environmental benefits, poly(vinylidene fluoride) (PVDF)-based composite powder coating was developed without using any harmful solvent. However, it still remains poor adhesion to substrates and low compatibility to acrylic resin issues. To address these challenges, PVDF was grafted with glycidyl methacrylate (GMA) through a facile and scalable reactive extrusion method. The resulting product, PVDF-g-GMA, was then mixed with different contents of polymethyl methacrylate (PMMA), and the mixing was sprayed onto aluminum substrates. The PVDF-g-GMA/PMMA powder coating shows the excellent adhesion and corrosion resistance, particularly when the PMMA content is 30 wt%, owning to the good compatibility of PVDF-g-GMA and PMMA. This work opens up a new possibilities for the development of advanced composite powder coatings with improved performance characteristics.     

Advanced anticorrosion coatings prepared from polybenzoxazine/siloxane-containing epoxy resin

In this study, a new type of coating comprising benzoxazine and siloxane-containing epoxy (SiEP) resin was prepared by the thermal curing method. The FTIR (Fourier transform infrared) analysis not only confirmed the complete reaction between polybenzoxaine and SiEP resin after heat curing, but also found the hydrogen-bonding interactions between them. The addition of SiEP resin significantly enhanced the hydrophobicity and adhesion ability of the coating and greatly improved the water contact angles of the blend coatings (>108°), compared to that of the pristine PBa coating, which attributed to the introduction of a Si O Si network structure in the matrix. In addition, the corrosion resistance of the coating was tested though a series of electrochemical experiment. According to the results, the corrosion current values of the blend coatings decreased by about four orders of magnitude compared to that of the pristine carbon steel, and the corrosion protection efficiency of the blend coatings were >99%, indicating good application prospect of these blend coatings.     

咪唑啉季铵盐缓蚀剂改性蒙脱土/水性环氧纳米复合涂料

以油酸、二乙烯三胺和氯化苄为原料,合成了咪唑啉季铵盐缓蚀剂。通过FT-IR、₁^H-NMR对季铵盐结构进行了表征。并将其离子交换至钠基蒙脱土(DK0)层间,制备缓蚀剂改性有机蒙脱土QACDK0。通过XRD,TGA和UV-Vis对QACDK0的结构、组成及层间缓蚀剂释放性能进行了表征,结果表明季铵盐缓蚀剂的插入使蒙脱土层间距由12.8 ?扩大到39.8 ?,蒙脱土中缓蚀剂负载量约为39.0 wt%。为研究在同种基质中使用不同纳米粘土对水性环氧涂层防腐性能的影响,将缓蚀剂改性有机蒙脱土、无机蒙脱土及市售普通有机改性蒙脱土加入到环氧树脂E-51中,通过相反转法制备了水性环氧树脂/蒙脱土纳米复合乳液。利用DLS和Zeta电位对环氧乳液的稳定性进行表征,其中咪唑啉季铵盐缓蚀剂改性蒙脱土/环氧乳液Zeta电位为-27.8 mV,稳定性最高。电化学阻抗谱(EIS)测试表明,在腐蚀介质中浸泡30天后,基于QACDK0制备的防腐清漆漆膜阻抗模值仍保持最高,具有2.29×10₈ ^Ohm.cm₂^的高阻抗值,表明季铵盐缓蚀剂的释放使涂层具有更好的主动防腐性能。在耐中性盐雾测试中,QACDK0对应的防腐色漆耐盐雾时间更长,验证了该涂层具有良好的耐盐雾性能。此外,该涂层表面平整致密,具有良好的阻隔性能。     

Effect of nano-sized mesoporous silica MCM-41 and MMT on corrosion properties of epoxy coating

This study investigated the effect of co-incorporation of two different kinds of nano materials with different forms, layers (Na-MMT) and mesoporous silica particles (MCM-41), into the polymer matrix on the corrosion performance of epoxy resin. Correspondingly corrosion performance of the coatings was studied by electrochemical impedance spectroscopy (EIS) in 3.5% NaCl aqueous solution and salt spray test. The X-ray diffraction (XRD) measurement showed that the Na-MMT layers were exfoliated and the hexagonal framework structure of MCM-41 was retained during and after the composite preparation. The co-incorporation of Na-montmorillonite (Na-MMT) and MCM-41 into the epoxy coating possessed the best corrosion resistance than incorporating either Na-MMT or MCM-41 particles separately due to different interfacial structures between the fillers and the matrix.     

环氧钢筋涂层的研制

分析了混凝土中钢筋的腐蚀环境及机理,介绍了一种针对性强的液体水工混凝土结构钢筋防腐涂料.以环氧树脂为基料,加入玻璃鳞片、颜料、助剂等,进行配方设计和性能分析.