Superhydrophobic aluminum alloy surface with excellent universality,corrosion resistance,and antifouling performance prepared without prepolishing

It is urgently necessary to seek more simple and effective methods to construct superhydrophobic metal surfaces to improve the corrosion resistance and antifouling performance. Herein, a facile method for fabricating superhydrophobic aluminum alloy surface is developed via boiling water treatment and stearic acid modification. It is noteworthy that no prepolishing on aluminum alloy is required and no caustic reagents and typical equipments are used during the preparation procedure. Therefore, the fabrication method is quite a simple and environment-friendly technique. Both micro- and nano-scaled binary structure forms at the resultant aluminum alloy surface while long alkyl chains are grafted onto the rough aluminum alloy surface chemically. Consequently, the resultant aluminum alloy exhibits outstanding superhydrophobicity. More importantly, the superhydrophobicity has excellent universality, diversity, stability, excellent corrosion resistance, and antifouling performance. The facile preparation, excellent superhydrophobic durability, and outstanding performance are quite in favor of the practical application.     

Alternating Multilayer Structural Epoxy Composite Coating for Corrosion Protection of Steel

Epoxy composite coatings filled with fillers have been used extensively as anticorrosion materials. In this study, an alternating multilayer structure is designed to obtain multifunctional epoxy resin composite coating based on stepwise coating method via adding graphene and α‐alumina. Their mechanical properties, thermal conductivity, dielectric and anticorrosion properties are characterized. The toughness and the thermal conductivity clearly increase, while the dielectric properties decrease approximately to zero when the filler mass fraction increases from 0.00% to 0.15%. The whole corrosion process is controlled by electrochemical reaction, and the fillers effectively block the corrosive medium, thus improving the anticorrosion performance of the composite coating.     

Corrosion protection of aluminum alloy by epoxy coatings containing polyaniline modified graphene additives

In the study, polyaniline/reduced‐graphene oxide (PANI‐RGO) composites, fabricated by loading 2, 5, and 8wt% graphene oxide, was prepared by in‐situ emulsion polymerization and reduction. They are characterized by Fourier transform infrared spectroscopy, X‐ray diffraction, and scanning electron microscopy. Epoxy coatings adding PANI and PANI‐RGO composites were coated on the surface of AA5083 Al alloy. The anticorrosion performance of the coatings is measured by electrochemical impedance spectroscopy and potentiodynamic polarization curve in 3.5wt% NaCl solution. The results demonstrate that the epoxy/PANI‐RGO coating exhibits a better protection against AA5083 alloy corrosion compared with the epoxy/PANI coating. Enhancement of the passivation performance of PANI was obtained by the addition of RGO into epoxy/PANI coating system.     

Microencapsulation of oil soluble polyaspartic acid ester and isophorone diisocyanate and their application in self-healing anticorrosive epoxy resin

Isocyanate and amine solution are microencapsulated, respectively, via in situ polymerization to realize the self-healing function in epoxy matrix. First, the isophorone diisocyanate (IPDI) microcapsules prepared with different core/shell ratios, emulsifier dosages and emulsification rates are characterized by field emission scanning electron microscope (FE-SEM). They exhibit integral spherical shape when the core/shell ratio is 3:1 and emulsifier concentration is 2.52 wt %, and the diameter of IPDI microcapsules ranged from 2.66 μm to 11.25 μm is manufactured by adjusting emulsification rate over the range of 3000–9000 rpm. Besides, during the microencapsulation of polyaspartic acid ester (PAE), urea, tung oil, as well as aqueous isocyanate are proposed to improve the stability of PAE emulsion. SEM and FTIR results reveal that aqueous isocyanate can react with partial PAE and form polyurea (PU) layer to take protection effectively. Further, IPDI-PAE dual microcapsules are incorporated into epoxy coatings, the self-healing and anticorrosion performance of coatings with various amounts of microcapsules are investigated systematically. It was found that the degree of repair and anticorrosion are increased with increasing microcapsules loading, and the appropriate amount of microcapsules addition is 15 wt %, which corresponding to 93% repair efficiency. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48478.     

天然气管道输送过程中管道防腐的研究及防腐方法

近几年来,天然气行业得到了很大的发展和提升,针对于天然气的应用,也越来越广泛。而在天然气应用愈加增多的情况下,针对天然气管道的建设越来越多天然气的运输主要依靠于天然气管道,因此天然气管道的安全性极其重要。接下来,本文将结合天然气管道腐蚀的成因,探讨加强天然气管道输送过程中天然气管道防腐工作的方法和措施。     

油田注水管道的腐蚀因素及防腐措施

随着时代以及经济的不断发展,因为油田的注水管道系统运行的好坏会直接关系到油田开发的程度,所以油田注水系统受到了油田工作者的极大重视。但是由于一些地理因素或者是天气的原因,油田注水管道的腐蚀问题依然十分严重,接下来,本文将结合油田注水管道的腐蚀因素,探讨加强油田主水管道防腐工作的方法和措施。     

油气储运中的管道防腐问题研究

如今工业发展迅速,油气储运与人们的生活密切相连,在工业发展中也起到了重要作用。油气储运中的管道设备是储运中的一个重要部分,所以管道的安全十分重要。在运送过程中有很多隐患,受外界因素和油气本身的因素,容易使油气挥发,引发火灾,使管道腐蚀加重。针对这个问题,对于如何解决管道腐蚀和提高油气的运输效率的问题提出了合理解决措施。     

Hydrophobic organic coating based water--solid TENG for water-flow energy collection and self-powered cathodic protection

Water–solid triboelectric nanogenerators (TENGs), as new energy collection devices, have attracted increasing attention in ocean energy harvesting and self-powered sensing. Polyacrylic acid (PAA) coating, usually used on the surface of marine equipment, has the property of anti-aging and anti-wear but limits triboelectrical output when used with TENGs. In this paper, polyacrylic acid coating was modified with fluorinated polyacrylate resin (F-PAA) to increase its triboelectrical output, by 6 times, and also to increase its anti-corrosion property. In addition, the corrosion resistance property can be further enhanced by cathodic protection using the electrical output generated by the water-flow triboelectrical energy transfer process. Given their easy fabrication, water-flow energy harvesting, and corrosion resistance, PAA/F-PAA coating-based TENGs have promising applications in river and ocean energy collection and corrosion protection.     

浅析接地装置防腐及措施

接地装置是接地体和接地总线的总称,保持其良好接地状态是确保人身、设备以及构筑物安全的重要环节。使用过程中,接地装置尤其容易遭受腐蚀破坏,进而会影响其接地防护效果。文章详细分析了接地装置腐蚀的部位、原因和种类;在此基础上,介绍了五类防腐技术措施;此外,对接地装置的施工要点也进行了分析。     

海洋重防腐涂料及涂装体系现状及发展趋势

全面分析了我国船舶涂料、集装箱涂料、海洋资源开发及装备的防腐涂料涂装体系以及沿岸基础设施建设的防腐蚀保护涂料的现状及发展趋势。