Multiphase Interfacial Regulation Based on Hierarchical Porous Molybdenum Selenide to Build Anticorrosive and Multiband Tailorable Absorbers

Electromagnetic wave(EMW)absorbing materials have an irreplaceable position in the field of military stealth as well as in the field of electromagnetic pollution control.And in order to cope with the complex electromagnetic environment,the design of multifunctional and multiband high efficiency EMW absorbers remains a tremendous challenge.In this work,we designed a three-dimensional porous structure via the salt melt synthesis strategy to optimize the impedance matching of the absorber.Also,through interfacial engineering,a molybdenum carbide transition layer was introduced between the molybdenum selenide nanoparticles and the three-dimensional porous carbon matrix to improve the absorption behavior of the absorber.The analysis indicates that the number and components of the heterogeneous interfaces have a significant impact on the EMW absorption performance of the absorber due to mechanisms such as interfacial polarization and conduction loss introduced by interfacial engineering.Wherein,the prepared MoSe_(2)/MoC/PNC composites showed excellent EMW absorption performance in C,X,and Ku bands,especially exhibiting a reflection loss of−59.09 dB and an effective absorption bandwidth of 6.96 GHz at 1.9 mm.The coordination between structure and components endows the absorber with strong absorption,broad bandwidth,thin thickness,and multi-frequency absorption characteristics.Remarkably,it can effectively reinforce the marine anticorrosion property of the epoxy resin coating on Q235 steel substrate.This study contributes to a deeper understanding of the relationship between interfacial engineering and the performance of EMW absorbers,and provides a reference for the design of multifunctional,multiband EMW absorption materials.

Development of Siliconized Epoxy Resins and Their Application as Anticorrosive Coatings

The present work involves the development of siliconized epoxy resin to overcome the drawback of epoxy resin like poor impact strength, high rigidity and moisture absorbing nature because of which they are not applied as corrosion resistant coating. By embedding silicone into the back bone of polymeric resin the above drawback can be reduced to substantial level. For achieving this, siliconised epoxy resins were prepared by reacting amine terminated silicone resin with novolac epoxy resin and meta-phenylenediamine was used as curing agent. The applied films of coating were baked at 150oC. Cured films were evaluated for their thermal, mechanical, chemical and corrosion resistance properties to ascertain the commercial utility of these eco-friendly resin for use in anti corrosive formulations. The siliconized epoxy resins system was found to exhibit good thermal and anticorrosive properties.

Formation of a cerium conversion coating on magnesium alloy using ascorbic acid as additive.Characterisation and anticorrosive properties of the formed films

Cerium-based conversion coatings were formed on AZ91D magnesium alloy by immersion of the substrate in solutions containing Ce(NO_(3))_(3),H_(2)O_(2) and ascorbic acid(HAsc).The characterisation of the films was performed by electrochemical and surface analysis techniques such as SEM,EDS,X-ray diffraction and X-ray photoelectron spectroscopy(XPS).The degree of corrosion protection achieved was evaluated in simulated physiological solution by the open circuit potential monitoring,polarisation techniques and electrochemical impedance spectroscopy(EIS).The presence of HAsc in the conversion solution causes changes in the morphology,adherence and anticorrosive performance of the films.The improvement in the corrosion resistance is closely associated with the corrosion inhibition properties of HAsc.

Effect of Nano Al Pigment on the Anticorrosive Performance of Waterborne Epoxy Coatings

This paper presents the results regarding the effect of nano aluminum powder pigment concentration on the protective properties of waterborne epoxy films in 3.5 wt pct NaCl solution. The anticorrosive performance of the coatings with 0.5, 1, and 3 wt pct pigments and none pigment were investigated using electrochemical impedance spectroscopy （EIS）, scanning electron microscopy （SEM） and Raman spectroscopy techniques. The results show that adding appropriate amount of nano-aluminium powder pigment can enhance the barrier properties of the epoxy coating, which is attributed to the surface effect of nanoparticles and the compatibility of the pigment with the waterborne epoxy coatings.

Anticorrosive and antibacterial smart integrated strategy for biomedical magnesium

Biomedical magnesium is an ideal material for hard tissue repair and replacement.However,its rapid degradation and infection after implantation significantly hindersclinical applications.To overcome these two critical drawbacks,we describe an integrated strategybased on the changes in pH and Mg^(2+)triggered by magnesiumdegradation.This system can simultaneously offer anticorrosion and antibacterial activity.First,nanoengineered peptide-grafted hyperbranched polymers(NPGHPs)with excellent antibacterial activity were introduced to sodium alginate(SA)to construct a sensitive NPGHPs/SA hydrogel.The swelling degree,responsiveness,and antibacterial activity were then investigated,indicating that the system can perform dual stimulation of pH and Mg^(2+)with controllable antimicrobial properties.Furthermore,an intelligent platform was constructed by coating hydrogels on magnesium with polydopamine as the transition layer.The alkaline environment generated by the corrosion of magnesium reduces the swelling degree of the coatingso that the liquid is unfavorable for contacting the substrate,thus exhibiting superior corrosion resistance.Antibacterial testing shows that the material can effectively fight against bacteria,while hemolytic and cytotoxicity testing suggest that it is highly biocompatible.Thus,this work realizes the smart integration of anticorrosion and antibacterial properties of biomedical magnesium,thereby providing broader prospects for the use of magnesium.

Development of Hexachloroiridic Acid Anticorrosive Coating

A technology of preparing hexachloroiridic acid by melting oxidation chemistry is introduced, the content of Ir 4+ can reach 99% and the total impurities content is less than 0.1% in this hexachloroiridic acid anticorosive coating.

Application and Development of Anticorrosive Wood in Environmental Art

In view of development of anticorrosive wood and its application in environmental art,problems in anticorrosive wood application and countermeasures were explored to improve the application of anticorrosive wood,increase the application amount and range.

The anti-Temperature-vibration properties of viscoelastic anticorrosive tape

Viscoelastic anticorrosive tape is extensively used for repairing anticorrosive layers on compressor outlet pipelines in the oil and gas industry.However,there is no relevant research on the coupling effect of temperature and vibration on the performance of viscoelastic anticorrosive tape.In this paper,acceleration tests of temperature and vibration coupling conditions were conducted to investigate the performance of viscoelastic anticorrosive tape.After temperature and vibration treatment,the specimens showed wide variance in thickness,and the adhesion and chemical soaking resistance of the tape was reduced.However,the viscoelastic anticorrosive tape still showed high adhesion.According to theoretical calculations,the tested viscoelastic body can repair pipes with a maximum diameter of 903 mm.Therefore,this viscoelastic anticorrosive tape is suitable for the compressor outlets of buried pipelines with diameters smaller than 903 mm.The research in this paper provides a method and basis for the selection of repairing materials for the anticorrosion coatings of compressor outlet pipelines.

The Selection and Application of Anticorrosive Materials for Flue Gas Desulfurization (FGD) System in Cement Plant

This paper combined with the actual case of flue gas desulfurization (FGD) system in cement Plant, analyzes the corrosion environment in each area of the FGD system, and selects appropriate anticorrosive materials for different corrosion environment, so as to provide operating experience and reference for the safe, stable and efficient operation of the FGD system.

Anticorrosive Coatings Based on Few-Layer Graphene

In this paper the anticorrosive properties of the few-layer graphene nanostructures were investigated. On the surface ofcopper and nickel plates the few-layer graphene nanostructures were formed using the CVD （chemical vapor deposition） method.After that, these plates were exposed to the temperature in the air atmosphere. The results of elemental analysis, performed by theEDS （energy dispersive spectroscopy） method showed that the few-layer graphene coated metal plates proved to be more resistant tooxidation than bare metal plates. In addition, we presented computer models and theoretical calculations of the studied systems,performed by the DFT （density functional theory） and MD （molecular dynamics） methods. These results combined with experimentaldata show the high effectiveness of the protective action of the few-layer graphene against metal corrosion.

Effect of low curing temperature on the anticorrosion performance of composite coatings reinforced with modified Fe_(3)O_(4)

In this manuscript,the neat epoxy(EP)and functionalized Fe_(3)O_(4)(G-Fe_(3)O_(4))reinforced epoxy(G-Fe_(3)O_(4)/EP)coatings were cured under different temperatures,and the effect of the low curing temperature on the anticorrosion performance was investigated.The experimental results show that the epoxy-amine ring-open addition reaction mainly exists in the curing process,and the activation energies of the reaction for the two coatings are 55.84 and 53.29 kJ/mol,respectively.For the coatings cured at the low temperature,almost no pores could be detected on the fracture surface,but the presentence of the rough regions reflects the poor curing state.As compared with the samples cured at the high temperature,the anticorrosion performance of the coatings with the low curing temperature is worse,and the decrease rate of the anticorrosion performance is slower,because of the poor curing state and low adhesion obtained at the low temperature.

Analyze the Performance of Electroactive Anticorrosion Coating of Medical Magnesium Alloy Using Deep Learning

Electroactive anticorrosion coatings are specialized surface treatments that prevent or minimize corrosion. Thestudy employs strategic thermodynamic equilibriumcalculations to pioneer a novel factor in corrosion protection.A first-time proposal, the total acidity (TA) potential of the hydrogen (pH) concept significantly shapes medicalmagnesium alloys. These coatings are meticulously designed for robust corrosion resistance, blending theoreticalinsights and practical applications to enhance our grasp of corrosion prevention mechanisms and establisha systematic approach to coating design. The groundbreaking significance of this study lies in its innovativeintegration of the TA/pH concept,which encompasses the TA/pH ratio of the chemical environment. This approachsurpasses convention by acknowledging the intricate interplay between the acidity and pH levels within thecoating formulation, thereby optimizing metal-phosphate-based conversion coatings and transforming corrosionmitigation strategies. To authenticate the TA/pH concept, the study comprehensively compares its findings withexisting research, rigorously validating the theoretical framework and reinforcing the correlates among TA/pHvalues and observed corrosion resistance in the coatings. The influence of mutations that occur naturally inthe detergent solution on persistent phosphorus changes is shown by empirical confirmation, which improvescorrosion resistance. This realization advances the field ofmaterials and the field’s knowledge of coated generation,particularly anticorrosion converter layers.

氮杂环类碳钢缓蚀剂的研究进展及在涂层中的应用

碳钢防腐是当前社会广泛关注的问题。有机缓蚀剂作为一种高效、便捷和低成本的防腐技术广泛应用于涂层中。氮杂环类缓蚀剂因结构可设计性强,缓蚀性能佳的优点成为近年来有机缓蚀剂领域研究的重点。文中主要分析了氮杂环类缓蚀剂的改性方法以及含咪唑啉环、三唑环、吡啶环和嘧啶环结构缓蚀剂的研究进展,阐述了结构改性对缓蚀剂缓蚀性能的影响规律以及缓蚀剂在涂层中的应用,最后展望了缓蚀剂涂层的发展趋势。

基于聚硅氮烷疏水改性涂层的研究进展

聚硅氮烷是一种以Si-N键为主链的硅基聚合物,结构中含有Si-H、N-H等具有反应活性的化学键,既有利于其与基材的紧密结合,也可用来接入各类功能性基团以获得不同特性,使其在疏水涂层方面具有重大的应用前景。文章主要聚焦于聚硅氮烷在疏水涂层领域的研究与应用,综述了聚硅氮烷疏水涂层的改性方法及其在防冻疏冰、自清洁、防腐等领域的应用进展。提出通过自修复或添加填料可改善目前聚硅氮烷疏水涂层普遍存在的机械耐久性较差等问题,展望了聚硅氮烷疏水涂层在更多领域的应用,为其后续研究提供了思路。

碳量子点纳米材料在金属防腐中的应用现状

碳量子点纳米材料作为新型零维碳纳米材料,具备水溶性好、低毒及易于改性等诸多优点,在金属防腐领域得到了广泛的应用研究。综述了碳量子点纳米材料在缓蚀剂和防腐涂层两个方向上的研究进展,分别介绍了其在缓蚀剂和防腐涂层领域的制备方法、作用机理和具体性能,研究者认为通过制备不同前驱体碳量子点纳米材料加以不同官能团修饰,可以有效提高缓蚀剂缓蚀性能;碳量子点在改性后作为纳米填料可以有效改善涂料防腐性能。指出碳量子点的功能化改性、碳量子点荧光特性的拓展应用以及碳量子点的规模化制备是其未来在金属防腐领域的重要研究方向。

氧化石墨烯增强硅烷丙烯酸复合防腐涂料的制备及性能

[目的]水性丙烯酸乳液涂层在力学性能、耐久性和附着力方面有待提高。[方法]将改性后的硅氧烷基丙烯酸乳液与氧化石墨烯等功能性填料进行混合,制备出一种具有高力学性能、高耐久性和良好附着力的常温固化型硅烷复合丙烯酸涂料。选用镀锌钢板作为基材,对涂料进行施工,并对其性能进行了测试。[结果]添加氧化石墨烯后,丙烯酸涂料的附着力达到0级,铅笔硬度达到6H,并且在耐水性、耐碱性、耐盐雾性等方面均有显著提升。[结论]该涂料满足了接地引下线与接地体之间腐蚀防护的技术要求。

掺杂纳米Al_(2)O_(3)与改性植酸的复合环氧涂层的制备及其性能研究

为了提高环氧树脂涂层的防腐性能并赋予其自修复性,在四丁基溴化铵的催化下,将植酸接枝到乙二醇二缩水甘油醚上,并与纳米Al_(2)O_(3)混合掺入到环氧树脂中,制备了一种新型复合环氧树脂涂层。探究了纳米Al_(2)O_(3)质量分数对涂层防腐性的影响,并且对其表面形貌、光泽、力学性能、自修复性和防腐性进行了测试。结果表明:改性植酸和纳米Al_(2)O_(3)的加入显著提高了环氧涂层的表面平整度、光泽和硬度。当改性植酸的含量控制在5%,纳米Al_(2)O_(3)的含量达到5%时,复合涂层的硬度达到H,腐蚀电流密度达到7.85×10^(-8)A/cm^(2),腐蚀电位为−0.805 V。除此之外,复合涂层还具有良好的自修复性。改性植酸和纳米Al_(2)O_(3)的引入显著提高了环氧树脂涂层的防腐性能、自修复性能和耐久性。

一种环氧有机硅耐热漆层在飞机发动机尾气相连接零件上的应用

介绍了一种H61-1铝粉环氧有机硅耐热面漆和配套的H61-83环氧有机硅耐热底漆在与飞机发动机尾气相连接的某零件上的应用。通过加热法、划格法以及冲击法对该漆层进行了耐热性、结合力和冲击强度的测试。结果表明,这种漆层具有良好的耐热性、结合力和耐冲击性能。将这种漆层应用于与飞机发动机尾气相连接的零件上,零件可长时间承受发动机尾气对漆层的影响,避免漆层的老化、脱落,使零件的防腐能力和使用寿命得到提高。

图像识别技术在防腐涂层中的研究进展

防腐涂层是防止金属腐蚀及其加剧的一种有效方式,但其防护性能的无损检测是目前研究的难点。图像识别技术作为无损检测的一种,有望成为防腐涂层防护性能智能检测的方法。本研究综述了图像识别技术的种类和步骤,介绍了传统图像识别技术在防腐涂层失效行为方面的评估结果、深度学习图像识别技术在防腐涂层缺陷分析的应用以及图像识别技术在涂层电化学阻抗谱中的应用,展望了图像识别技术在防腐涂层中的发展方向。

乘用车车身防腐工艺设计要点研究

随着汽车技术的发展,乘用车车身的腐蚀问题已成为消费者日益关注的质量问题之一。本研究从影响车身防腐性能的工艺设计方面出发,阐述了乘用车车身防腐工艺设计要点及工艺技术要求,重点对乘用车车身防腐性能的工艺设计、材料选型、生产制造、过程质量控制等因素进行详细叙述,从而为车身防腐工艺设计提供一定的参考依据。