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  • 1.
    Gidlund, Henrik
    et al.
    Trafikverket, Sweden.
    Lindgren, Mikael
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Muzet, Valerie
    CEREMA, France.
    Rossi, Giuseppe
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Iacomussi, Paola
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Road surface photometric characterisation and its impact on energy savings2019In: Coatings, ISSN 2079-6412, Vol. 9, no 5, article id 286Article in journal (Refereed)
    Abstract [en]

    How road surfaces reflect light in space is a physical characteristic that plays a key role in the design of road lighting installations: by European Standards the average luminance is the target quantity to assure the required safety conditions of the motorized road traffic. Lighting systems are designed (luminous flux installed per kilometre) to comply with the above requirement, starting from reference values of road surfaces reflection published in an old scientific document. These data are obsolete and not representative of current road surfaces, but they are still used to design current LED lighting systems. European Community funded a SURFACE project to provide to EU standard organization new traceable reference data, representative of current road surfaces used in EU. The paper presents the data collections and the impact on road lighting of using available old reference data versus SURFACE collected data of current road surfaces. Results highlight advantages in using bright pavements as well the need for introducing systems for flux control in road lighting installation to compensate for the discrepancies between current reference data and actual road surface data.

  • 2.
    Nazarov, A
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Petrunin, M.
    Russian Academy of Sciences, Russia.
    Maksaeva, L.
    Russian Academy of Sciences, Russia.
    Yurasova, T.
    Russian Academy of Sciences, Russia.
    Traverso, P.
    CNR-IAS, Italy.
    Marshakov, A.
    Russian Academy of Sciences, Russia.
    Vapour phase deposition of thin siloxane coatings on the iron surface. The impact of the layer structure and oxygen adsorption on corrosion stability2021In: Coatings, ISSN 2079-6412, Vol. 11, no 10, article id 1217Article in journal (Refereed)
    Abstract [en]

    The mechanism of iron corrosion protection by thin siloxane films was clarified. Quartz crystal microbalance technique (QCM) was applied to control the vapour phase deposition of alkoxysilanes and the formation of thin siloxane films. It was shown that the addition of water vapour increased the thickness of the grafted siloxane films. Crystal-like films spontaneously grow to 10–16 monolayers at 100% RH of Ar flow due to the catalytic effect of the surface. X-ray photoelectron (XPS) and Auger spectroscopies analysed the thin siloxane films and Scanning Kelvin Probe (SKP) showed the formation of iron-siloxane bonds passivating the iron surface. The films showed high hydrophobicity and corrosion inhibition in humid air contaminated by sulphur dioxide. Thick films were less ordered, hydrophilic and accelerated the corrosion of iron. For corrosion protection, the presence of oxygen in the atmosphere is extremely important. In a wet Ar atmosphere, contaminated by sulphur dioxide, the surfaces are not stable and quickly corroded. Oxygen adsorption stabilizes the surface oxide film that correspondingly preserves the anchoring iron-siloxane bonds and enables corrosion protection by the coating. © 2021 by the authors. 

  • 3.
    Peltier, Fabienne
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Thierry, Dominique
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Review of Cr-Free Coatings for the Corrosion Protection of Aluminum Aerospace Alloys2022In: Coatings, ISSN 2079-6412, Vol. 12, no 4, article id 518Article in journal (Refereed)
    Abstract [en]

    Aluminum alloys are known to have many advantages (e.g., light weight and low cost) but they are not immune to corrosion. So, it is important to assess their corrosion behavior, in particular under atmospheric conditions. To protect aluminum alloys against corrosion, paints are generally applied onto the materials. Corrosion protection in the aerospace industry consists of a conversion or anodized coating, an inhibited primer, and a top-coat. Chromate conversion coating (CCC) and primers containing chromate pigments have been widely used in the aerospace industry over the last decades. However, new environmental regulations have led to major changes for aluminum corrosion protection. By limiting or prohibiting some chemicals, for instance Cr(VI), the European regulation REACH (Regulation on Registration Evaluation, Authorization and Restriction of Chemicals) has induced major changes to some of the finishing processes of aluminum alloys (e.g., chromate conversion, chromic acid anodizing, and chromate sealing). Interesting results have been obtained while seeking replacements for Cr(VI), for example, with the incorporation of cerium, lithium salt, or nanocontainers loaded with corrosion inhibitors in organic coatings. For several years, hybrid sol–gel coatings able to replace the pre-treatment and primer steps have been under development, showing interesting results. New prospects for the future involve the use of photo-polymerization to reduce the energy-intensive heat treatment needed in sol–gel technology. It will also be necessary to test these new technologies in service conditions or in accelerated corrosion tests before being able to conclude on the real effectiveness of these coatings. This review summarizes the recent developments in Cr-free coatings for aluminum alloys. Their advantages and draw-backs are also discussed. 

  • 4.
    Pélissier, Krystel
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Diler, Erwan
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Dossot, Manuel
    Université de Lorraine, France.
    Carteret, Cédric
    Université de Lorraine, France.
    Vittonato, Jean
    TotalEnergies OneTech, France.
    Castillon, François
    Téréga, France.
    Fontaine, Sylvain
    GRTgaz, France.
    Kerzerho, Thierry
    GRTgaz, France.
    Larché, Nicolas
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Lucas, Patrice
    BS Coatings, France.
    Effects and Consequences of an Alkali-Induced Cathodic Environment on Coating Aging2023In: Coatings, ISSN 2079-6412, Vol. 13, no 11, article id 1949Article in journal (Refereed)
    Abstract [en]

    The use of organic coatings in conjunction with cathodic protection (CP) for buried structures is the usual method for protecting steel against corrosion. When the organic coating loses its protective ability, regardless of the reason, the CP becomes the active protection, leading to a specific local environment. This environment can be characterized by high alkalinity, which can be detrimental for the coated structure, either by weakening the steel–coating interface or by the chemical aging of the coating. Thus, the coating must be compatible with CP and able to sustain aging under an alkaline environment. In this study, the susceptibility to alkaline aging and its consequences in regards to coating performance have been investigated for two commercial coatings used for buried structures—fusion bonded epoxy (FBE) and liquid epoxy (LE)—in free membrane and coated steel configurations. The results showed a clear impact of alkaline aging on the studied LE, leading to a significant reduction in coating resistance and ultimately, failure of the steel–coating interface, whereas the studied FBE remained stable. The presented results relate to a precise formulation of LE and FBE; however, the proposed chemical method appears to be relevant and shows the necessity of considering such specific aging results for coating specifications and improvements.

  • 5.
    Pélissier, Krystel
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Le Bozec, Nathalie
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Thierry, Dominique
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Larché, Nicolas
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Evaluation of the Long-Term Performance of Marine and Offshore Coatings System Exposed on a Traditional Stationary Site and an Operating Ship and Its Correlation to Accelerated Test2022In: Coatings, ISSN 2079-6412, Vol. 12, no 11Article in journal (Refereed)
    Abstract [en]

    Anticorrosive coatings are widely used to protect steel against corrosion. Different standards exist to access the corrosion performance of anticorrosive paints. Among them, the so-called neutral salt spray test (NSST-ISO 9227) or cycling corrosion tests ISO 12944-6, ISO 12944-9, NACE TM0304, or NACE TM0404 can be named. It is well-known that some accelerated corrosion tests are not fully representative of the field exposure results. However, a lack in the literature exists correlating accelerated tests to field exposure, especially when long-term durations are considered. In this study, 11 different organic coatings have been investigated in terms of coating resistance to corrosion creep in two types of field exposure sites, namely a stationary site and an operating ship, and their performance was compared to two accelerated tests (ISO 12944-9 and modified ASTM D5894 standard). The results showed differences in the sites’ corrosivity and the coating systems’ performance as a function of the exposure sites. A lack of correlation exists between the ISO 12944-9 standard and the stationary site, due to the latter’s high corrosivity, while, to the contrary, a satisfying correlation with the operating ship was demonstrated; whereas, the modified ASTM D5894 standard showed a satisfying correlation with both types of sites.

  • 6.
    Pélissier, Krystel
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Thierry, Dominique
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Multiscale and multi-technical approach to characterize the hot-dip galvanized steel surface and its consequence(S) on paint adhesion and tendency to blistering2021In: Coatings, ISSN 2079-6412, Vol. 11, no 6, article id 704Article in journal (Refereed)
    Abstract [en]

    It is well known that the surface state (cleanliness, composition) of galvanized steel prior to the application of an organic coating is an important parameter. The surface state will affect the adhesion properties of the complete system and therefore will also impact its corrosion resistance and its tendency to blistering. Before the application of a pretreatment layer, galvanized steel strips are normally alkaline cleaned. This step is known to remove the native oxide film formed on hot dip galvanized steel after processing and appears as one of the most important steps to study the impact of the surface properties on the performance of painted systems. This study focused on making use of the cleaning step to input a variability on the surface composition (mainly surface concentration of aluminum) and evaluate its consequence(s) on the performance of a complete paint system. The results showed that, a variability in terms of surface aluminum concentration could be achieved by the cleaning step and that signs of performance improvement in terms of adhesion and tendency to blistering were spotted with a low content of aluminum at the surface.

  • 7.
    Pélissier, Krystel
    et al.
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Thierry, Dominique
    RISE Research Institutes of Sweden, Materials and Production, Corrosion.
    Powder and high-solid coatings as anticorrosive solutions for marine and offshore applications?: A review2020In: Coatings, ISSN 2079-6412, Vol. 10, no 10, article id 16Article in journal (Refereed)
    Abstract [en]

    The constant change in coating technology and environmental regulations has led to the development of low-solvent to solvent-free organic coatings, such as powder and high-solid coatings. These two technologies are well developed, but are still not the preferred choice when considering anticorrosive coating for marine and offshore applications. This mostly arise from a lack of perspective in their long-term behavior and from the difficulty in their applications. This review's principal aim is to describe powder and high-solid technologies from their formulation and application to their use in marine and offshore applications while recalling and giving key notions needed when the field of anticorrosive coatings is considered. First, the requirement for coatings to be called anticorrosive will be given alongside with their protection and failure mechanisms. The formulation and application for high-solid and powder coatings will be exposed followed by the description of the type of coating chemistry used in harsh environment. Finally, high-solid and powder coatings behavior in these types of environment will be discussed. © 2020 by the authors.

  • 8.
    Rollini, Manuela
    et al.
    University of Milan, Italy.
    Nielsen, Tim
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience.
    Musatti, Alida
    University of Milan, Italy.
    Limbo, Sara
    University of Milan, Italy.
    Piergiovanni, Luciano
    University of Milan, Italy.
    Hernandez Munoz, Pilar
    Packaging Lab, Spain.
    Gavara, Rafael
    Packaging Lab, Spain.
    Antimicrobial Performance of Two Different Packaging Materials on the Microbiological Quality of Fresh Salmon2016In: Coatings, ISSN 2079-6412, Vol. 6, no 1, article id 6Article in journal (Refereed)
    Abstract [en]

    In the present research the antimicrobial activity of two active packaging materials on the spoilage microbiota of fresh salmon fillets was tested. A PET-coated film (PET: Polyethylene Terephthalate) containing lysozyme and lactoferrin was tested in parallel with a carvacrol-coextruded multilayer film. Salmon fillet samples were stored up to four days at 0 and 5 °C, comparatively. The carvacrol multilayer film was found effective in preventing mesophiles and psychrotrophs at shorter storage time and at lower temperature (4.0 compared to 5.0 log CFU/g in the control sample—CFU: Colony Forming Units). Lysozyme/lactoferrin-coated PET was instead efficient in decreasing H2S-producing bacteria at longer storage time and higher temperature (2.7 instead of 4.7 log CFU/g in the control sample). Even if is not intended as a way to “clean” a contaminated food product, an active package solution can indeed contribute to reducing the microbial population in food items, thus lowering the risk of food-related diseases.

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  • 9.
    Rusu, Caterina
    et al.
    NTNU, Norway.
    Brodin, Malin
    RISE - Research Institutes of Sweden (2017-2019), Bioeconomy, PFI.
    Hausvik, Tor Inge
    Berry Alloc, Norway.
    Hindersland, Leif Kåre
    Berry Alloc, Norway.
    Chinga-Carrasco, Gary
    RISE - Research Institutes of Sweden (2017-2019), Bioeconomy, PFI.
    Einarsrud, Mary Anne
    NTNU, Norway.
    Lein, Hilde
    NTNU, Norway.
    The potential of functionalized ceramic particles in coatings for improved scratch resistance2018In: Coatings, ISSN 2079-6412, Vol. 8, no 6, article id 224Article in journal (Refereed)
    Abstract [en]

    The top layer of a typical high pressure floor laminate (HPL) consists of a melamine formaldehyde (MF) impregnated special wear layer (overlay) with alumina particles. This top layer plays a crucial role in determining the mechanical properties of the laminate. For HPLs, scratch resistance and scratch visibility are particularly important properties. This study aimed to improve the mechanical properties, particularly the scratch resistance, by adjusting the composition of the overlay. Laminates containing alumina particles were prepared and tested. These alumina particles were additionally functionalized with a silane coupling agent to ensure better adhesion between the particles and the resin. The functionalized particles led to enhanced scratch resistance of the laminates as well as improved dispersion of the particles within the resin. Micro scratch testing revealed that by using functionalized particles, the scratch surface damage was reduced and the recovery characteristics of the surface layer were improved. Higher scratch resistance and scratch hardness were thus obtained, along with a reduced scratch visibility.

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1 - 9 of 9
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