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Wärnheim A, Edvinsson C, Sundell PE, Heydari G, Deltin T, Persson D. Depth-Resolved FTIR-ATR Imaging Studies of Coating Degradation during Accelerated and Natural Weathering-Influence of Biobased Reactive Diluents in Polyester Melamine Coil Coating. ACS OMEGA 2022; 7:23842-23850. [PMID: 35847300 PMCID: PMC9280932 DOI: 10.1021/acsomega.2c02523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Improved methods to assess the degradation of coil coatings to approximate lifetime have been an area of academic and industrial interest for decades. This work aims to elucidate the differences in the degradation behavior of two coil coating systems: one standard commercial formulation and one formulation with a significant addition of biorenewable reactive diluents. Depth-resolved degradation behavior of samples exposed to accelerated and natural field weathering is assessed. Focal plane array attenuated total reflection-Fourier transform infrared spectroscopy was used to acquire high-resolution chemical data from a sloping cross section. The results agreed with conventional photoacoustic spectroscopy. Degradation profiles for the two coatings were significantly different, with the biobased samples showing a more durable behavior. This study provides a method for detailed assessment of coating degradation, giving a good estimation of its durability. This is both a way to compare the performance of coating systems and to improve the understanding of the impact of exposure conditions, paving the way for the development of more sustainable coil coatings.
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Affiliation(s)
- Alexander Wärnheim
- Division
of Materials and Production, Department of Corrosion, Research Institutes of Sweden, Isafjordsgatan 28A, Kista 16407, Sweden
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Department
of Chemistry, Division of Surface and Corrosion Science, KTH Royal Institute of Technology, Stockholm 10044, Sweden
| | - Camilla Edvinsson
- Division
of Materials and Production, Department of Corrosion, Research Institutes of Sweden, Isafjordsgatan 28A, Kista 16407, Sweden
| | | | | | - Tomas Deltin
- Nordic
United Coatings, Cindersgatan
16, Helsingborg 25225, Sweden
| | - Dan Persson
- Division
of Materials and Production, Department of Corrosion, Research Institutes of Sweden, Isafjordsgatan 28A, Kista 16407, Sweden
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Liu CB, Cheng L, Qian B, Cui LY, Zeng RC. Corrosion self-warning and repair tracking of polymeric coatings based on stimulus responsive nanosensors. NANOSCALE 2022; 14:8429-8440. [PMID: 35642496 DOI: 10.1039/d2nr01406h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Smart polymeric coatings with early corrosion self-warning and damage self-repairing characteristics have garnered tremendous interest due to their ability to sense corrosion reactions and repair coating defects. However, tracking the repair process and its underlying protection mechanism is highly challenging. Herein, we report the construction of a novel composite coating by incorporating multifunctional nanosensors (graphene oxide-zeolitic imidazole frameworks loaded with 1,10-phenanthroline) into a thermo-responsive polyurethane. Under damaging events, the localized acidity derived from metal corrosion stimulates the decomposition of the nanosensors to produce 1,10-phenanthroline and benzimidazole. The generated ferrous ions are rapidly sensed by the released 1,10-phenanthroline to produce a conspicuous red color, which warns of the corrosion occurrence. In profiting from the photothermal effect of graphene oxide, the composite coating exhibits efficient crack closure behavior under near-infrared light irradiation. Morphology observation indicates that a coating scratch (about 30 μm wide) almost closed with 20 s of irradiation. The photothermally activated crack closure combined with benzimidazole inhibition endows the prepared coating with superior self-repairing performance. Interestingly, the change in color intensity around the coating defect can assist in tracking the repair process. Therefore, this work provides a novel strategy to visualize microscopic behaviors during damage and repair processes.
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Affiliation(s)
- Cheng-Bao Liu
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Li Cheng
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Bei Qian
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Lan-Yue Cui
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Rong-Chang Zeng
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
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Ji X, Yang J, Zhao N, Wang F, Xiao F. Synthesis of ethylene carbonate by alcoholysis of urea over Zn-Zr mixed oxides. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.109061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Theerasilp M, Crespy D. Halochromic Polymer Nanosensors for Simple Visual Detection of Local pH in Coatings. NANO LETTERS 2021; 21:3604-3610. [PMID: 33818088 DOI: 10.1021/acs.nanolett.1c00620] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Replacing metallic structures before critical damage is beneficial for safety and for saving energy and resources. One simple approach consists in visually monitoring the early stage of corrosion, and related change of pH, of coated metals. We prepare smart nanoparticle additives for coatings which act as a pH sensor. The nanoparticles are formed with a terpolymer containing two dyes as side chains, acting as donor and acceptor for a FRET process. Real time monitoring of the extent of localized corrosion on metallic structures is then carried out with a smartphone camera. Colored pH mapping can be then manually retrieved by an operator or automatically recorded by a surveillance camera.
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Affiliation(s)
- Man Theerasilp
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
| | - Daniel Crespy
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
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The Influence of the Roll-Laminating Process on the Bonding Quality of Polymer-Coated Steel Interface. COATINGS 2021. [DOI: 10.3390/coatings11040472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Polymer-coated steel (PCS) is a new type of metal packaging material under development, which has better performance in saving resources, energy, and environmental protection. The lamination process has an important influence on the bonding quality of the PCS interface. PCS samples under different lamination temperatures and lamination speeds were prepared through experiments. A binding rate is defined to represent the real bonding area of the PCS interface. The micro-scratch tester and scanner are used to study the influence of the lamination process on the bonding rate and bonding strength of the PCS interface. It is proposed that the bonding rate and bonding strength of the PCS interface increases with the increase of lamination temperature and increases with the decrease of lamination speed. The PCS interface bonding rate and bonding strength are positively correlated. SEM and DSC experiments revealed the cause of bubbles on the PCS surface. It is proposed that controlling the uniformity of the TFS surface temperature can reduce the quality defects of PCS surface bubbles. Relevant research results bring guiding significance for the formation of enterprises.
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Liu C, Qian B, Hou P, Song Z. Stimulus Responsive Zeolitic Imidazolate Framework to Achieve Corrosion Sensing and Active Protecting in Polymeric Coatings. ACS APPLIED MATERIALS & INTERFACES 2021; 13:4429-4441. [PMID: 33442971 DOI: 10.1021/acsami.0c22642] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Metal substrates beneath polymeric coatings are susceptible to localized corrosion, which could result in lifetime reduction and catastrophic failure without timely repair treatment. In situ detection of corrosion and repair coating defects are in high demand yet challenging to fulfill so far. Herein, we report a smart polymeric coating by integrating nanosensors into the coating matrix, which is capable of efficient corrosion sensing and active anticorrosion protecting. The nanosensors were constructed by zeolitic imidazolate framework encapsulated with the polyethylene glycol-tannic acid complex. The morphology, chemical constitution, and stimulus responsiveness of nanosensors were systematically analyzed. The generation of local corrosion beneath coating can be promptly sensed and reported by a conspicuous purple color derived from tannic-iron ion coordinates. Meanwhile, local electrochemical impedance spectroscopy results proved that the metal degradation process at the defected interface can be largely inhibited, exhibiting active anticorrosion property. Furthermore, the constructed smart coating possessed superior impermeability and long-term protective performance under simulated seawater and harsh salts spray conditions. This feasible and effective strategy based on simple nanosensors to engineer smart coatings paves a new way to develop high environmental adaptability protective materials with protecting, corrosion sensing, and self-healing functions.
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Affiliation(s)
- Chengbao Liu
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Bei Qian
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Peimin Hou
- State Key Laboratory of Marine Coatings, Marine Chemical Research Institute, Qingdao 266071, P. R. China
| | - Zuwei Song
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, P. R. China
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The Bonding Mechanism of the Micro-Interface of Polymer Coated Steel. Polymers (Basel) 2020; 12:polym12123052. [PMID: 33352798 PMCID: PMC7767149 DOI: 10.3390/polym12123052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/09/2020] [Accepted: 12/15/2020] [Indexed: 11/17/2022] Open
Abstract
As food and beverages require more and more green and safe packaging products, the emergence of polymer coated steel (PCS) has been promoted. PCS is a layered composite strip made of metal and polymer. To probe the bonding mechanism of PCS micro-interface, the substrate tin-free steel (TFS) was physically characterized by SEM and XPS, and cladding polyethylene terephthalate (PET) was simulated by first-principles methods of quantum mechanics (QM). We used COMPASS force field for molecular dynamics (MD) simulation. XPS pointed out that the element composition of TFS surface coating is Cr(OH)3, Cr2O3 and CrO3. The calculation results of MD and QM indicate that the chromium oxide and PET molecules compound in the form of acid-base interaction. The binding energies of Cr2O3 (110), (200), and (211) with PET molecules are -13.07 eV, -2.74 eV, and -2.37 eV, respectively. We established a Cr2O3 (200) model with different hydroxyl concentrations. It is proposed that the oxygen atom in C=O in the PET molecule combines with -OH on the surface of TFS to form a hydrogen bond. The binding energy of the PCS interface increases with the increase of the surface hydroxyl concentration of the TFS. It provides theoretical guidance and reference significance for the research on the bonding mechanism of PCS.
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Wang M, Zhang D, Yang Z, Yang C, Tian Y, Liu X. A Contrastive Investigation on the Anticorrosive Performance of Stearic Acid and Fluoroalkylsilane-Modified Superhydrophobic Surface in Salt, Alkali, and Acid Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10279-10292. [PMID: 32787017 DOI: 10.1021/acs.langmuir.0c02080] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Stearic acid and fluoroalkylsilane are widely used in chemical modification to fabricate superhydrophobic surfaces in corrosion-resistant exploration. However, extensive works have just explored their anticorrosive performance in salt solution. Very rare work has focused on comparing their corrosion-resistant performance in corrosive solution (salt, alkali, and acid) systematically. In this study, two kinds of superhydrophobic surfaces were obtained on laser-processed rough IN304 surface after the stearic acid and FAS modification processes, respectively. The investigation and comparison of anticorrosion performance in salt, alkali, and acid electrolyte were carried out via potentiodynamic polarization and electrochemical impedance spectroscopy measurements. The promotion mechanism or impairing mechanism was further proposed based on the results of surface wettability, surface morphology, and X-ray photoelectron spectroscopy. Besides, the long-term anticorrosion performance and the stability of surface wettability were also investigated. It is hoped that these research findings could provide an explicit guidance of suitable anticorrosion methods selection for metals in different kinds of corrosive solution (salt, alkali, and acid), which will further raise the promising prospect of functional surfaces for practical applications in industry.
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Affiliation(s)
- Meng Wang
- School of Mechanical Engineering, Tianjin University, Tianjin 300054, China
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin 300072, China
| | - Dawei Zhang
- School of Mechanical Engineering, Tianjin University, Tianjin 300054, China
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin 300072, China
| | - Zhen Yang
- School of Mechanical Engineering, Tianjin University, Tianjin 300054, China
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin 300072, China
- School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Chengjuan Yang
- School of Mechanical Engineering, Tianjin University, Tianjin 300054, China
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin 300072, China
| | - Yanling Tian
- School of Mechanical Engineering, Tianjin University, Tianjin 300054, China
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin 300072, China
- School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Xianping Liu
- School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
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