Nanostructured ceramic coatings engineered for reduction of corrosion, erosion, fouling and viscous drag in industrial pipes and tubes

纳米结构陶瓷涂层旨在减少工业管道中的腐蚀、侵蚀、结垢和粘性阻力

• 批准号: 478987-2015
• 负责人: Shankar, Karthik
• 金额: $ 10.27万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=641882
• 关键词: Nanostructured; ceramic; coatings; engineered; reduction

Steel structures such as reactor vessels, pipelines, boilers and industrial tubing are heavily used in the oil and gas industry, power generation, and in manufacturing for heating & transporting fluids. These structures are often subjected to erosion, corrosion and fouling effects. Erosion and corrosion are degradation mechanisms which result in frequent structural repair and maintenance. Scale formation lowers heat transfer efficiency in boilers & heat exchangers, and increases drag in pipelines. In demanding applications such as acid digestion vessels, polytetrafluoroethylene (PTFE) [a.k.a. TEFLON] coating is used on the inner side of the steel structure. PTFE coating protects tubing due to its chemical inertness, and through its highly amphiphobic (universal liquid repellent) property. The super-amphiphobic characteristic prevents fouling by discouraging the nucleation of organic and inorganic precipitates on PTFE-coated surfaces. The challenges facing the large-scale application of PTFE coatings include its high cost, low wear-resistance (being a soft material), and its poor heat transfer property. We address these challenges with our new idea of Ceramic Teflon coatings. Recently, we published a preliminary study where the super-amphiphobic characteristic of the proposed Ceramic Teflon coating was confirmed. Our idea here consists of using nanostructured Titanium Dioxide (TiO2) in combination with ultrathin conformal coatings of perfluorinated alkanephosphonic acids. TiO2 being a ceramic, is very hard and resists erosion. TiO2 is also chemically resistant to a broad spectrum of acids and bases, being vulnerable only to hydrofluoric acid. The perfluorinated organic thin film makes the overall coating liquid repellent. The nanostructuring of the TiO2 enables liquid-repellent Cassie-Baxter-type wetting states to form. The objectives of this proposal are therefore to build, test and implement Ceramic Teflon coated pipe structures in order to demonstrate and quantify their abilities to resist erosion, corrosion, fouling and reduce viscous drag. Thus, our application has a strong fundamental research component while also being of immediate commercial significance.

钢结构，如反应堆容器，管道，锅炉和工业管道大量用于石油和天然气工业，发电，以及用于加热和输送流体的制造。这些结构经常受到侵蚀、腐蚀和污垢的影响。侵蚀和腐蚀是导致结构频繁维修和维护的退化机制。结垢降低了锅炉和热交换器的传热效率，增加了管道的阻力。在要求苛刻的应用中，如酸消化容器，聚四氟乙烯（PTFE）[又称聚四氟乙烯。钢结构内侧采用聚四氟乙烯涂层。聚四氟乙烯涂层保护管由于其化学惰性，并通过其高度双疏性（通用液体排斥）的性质。超双疏特性通过抑制ptfe涂层表面上有机和无机沉淀的成核来防止污染。PTFE涂层大规模应用面临的挑战包括成本高、耐磨性低（作为软材料）和传热性能差。我们用陶瓷聚四氟乙烯涂料的新理念来解决这些挑战。最近，我们发表了一项初步研究，证实了所提出的陶瓷聚四氟乙烯涂层的超双疏性。我们的想法包括使用纳米结构的二氧化钛（TiO2）与全氟烷膦酸的超薄保形涂层相结合。二氧化钛是一种陶瓷，非常坚硬，耐腐蚀。二氧化钛在化学上也耐广泛的酸和碱，只对氢氟酸敏感。全氟有机薄膜使整体涂层具有防液性。二氧化钛的纳米结构使液体驱避cassie - baxter型润湿状态得以形成。因此，本提案的目标是构建、测试和实施陶瓷特氟龙涂层管道结构，以证明和量化其抵抗侵蚀、腐蚀、结垢和减少粘性阻力的能力。因此，我们的应用具有很强的基础研究成分，同时也具有直接的商业意义。