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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

Civil engineering, surveying & building --- Mechanical engineering & materials --- organic coatings --- corrosion protection --- pigments --- nanotechnology --- environmentally friendly --- organic coatings --- corrosion protection --- pigments --- nanotechnology --- environmentally friendly

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This volume illustrates some of the most innovative aspects of organic coatings designed not only to protect against corrosion but also to obtain smart coatings. Both modification of the composition of organic coatings and performance evaluation techniques are presented.

Technology: general issues --- History of engineering & technology --- Materials science --- ATH --- organic powder coatings --- polymer matrix --- pearlescent pigments --- powder coatings --- durability --- ageing treatments --- low VOC --- powder coating --- high-solid coating --- marine atmosphere --- offshore applications --- FBE --- rusted steel --- rust converter --- graphene oxide --- corrosion resistance --- colloidal silver --- cataphoretic deposition process --- salt spray chamber --- electrochemical impedance spectroscopy --- UV-B exposure test --- scanning electrochemical microscopy --- corrosion protection --- coating degradation --- corrosion inhibitor films --- electrochemical activity --- microelectrode --- graphene --- aluminum trihydrate --- electrochemical tests --- laboratory accelerated test --- ATH --- organic powder coatings --- polymer matrix --- pearlescent pigments --- powder coatings --- durability --- ageing treatments --- low VOC --- powder coating --- high-solid coating --- marine atmosphere --- offshore applications --- FBE --- rusted steel --- rust converter --- graphene oxide --- corrosion resistance --- colloidal silver --- cataphoretic deposition process --- salt spray chamber --- electrochemical impedance spectroscopy --- UV-B exposure test --- scanning electrochemical microscopy --- corrosion protection --- coating degradation --- corrosion inhibitor films --- electrochemical activity --- microelectrode --- graphene --- aluminum trihydrate --- electrochemical tests --- laboratory accelerated test

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This volume illustrates some of the most innovative aspects of organic coatings designed not only to protect against corrosion but also to obtain smart coatings. Both modification of the composition of organic coatings and performance evaluation techniques are presented.

ATH --- organic powder coatings --- polymer matrix --- pearlescent pigments --- powder coatings --- durability --- ageing treatments --- low VOC --- powder coating --- high-solid coating --- marine atmosphere --- offshore applications --- FBE --- rusted steel --- rust converter --- graphene oxide --- corrosion resistance --- colloidal silver --- cataphoretic deposition process --- salt spray chamber --- electrochemical impedance spectroscopy --- UV-B exposure test --- scanning electrochemical microscopy --- corrosion protection --- coating degradation --- corrosion inhibitor films --- electrochemical activity --- microelectrode --- graphene --- aluminum trihydrate --- electrochemical tests --- laboratory accelerated test

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Marine corrosion is a very ancient topic, as humankind has, since antiquity, struggled with the corrosiveness of seawater to exploit the countless and essential natural resources of the sea. It is also a broad topic because it combines chemical, biological, and mechanical factors. Among the numerous materials used for marine applications, iron-based alloys (i.e., steels) are essential in various industrial domains such as (of course) the naval industry (ships, submarines, etc.), the energy industry (pipelines, offshore platforms, renewable energy devices, etc.), and buildings (seaport structures, bridges, steel reinforcement in concrete, etc.). Marine corrosion is still an issue to this day, and the recent and necessary development of marine renewable energy devices has motivated innovative research. Currently, complete mastery of corrosion issues is a key aspect in the profitability of produced energy. Simultaneously, the requirements for environmentally friendly anticorrosion methods and processes are clearly expressed. Numerous fundamental and recent advances in marine corrosion and protection of steels, including carbon steel, low alloy steel, and stainless steel, can then be noted. This Special Issue is necessary to acknowledge the recent and sudden increase in the understanding of steel corrosion processes in marine environments and the associated optimization of anticorrosion methods. Last but not least, a large part of our cultural heritage lies at the bottom of seas and oceans, and it will definitely be lost if scientific research does not include current and historical concerns as well.

Technology: general issues --- Chemical engineering --- carbon steel --- seawater --- localized corrosion --- magnetite --- green rust --- iron sulfide --- marine corrosion --- magnesium --- X-ray diffraction --- reinforcement --- corrosion --- chlorides --- progression --- alkalinity --- cracking --- metabarcoding --- MIC --- multispecies --- SRB --- marine --- composites --- electrodeposition --- superhydrophobic coatings --- zinc and zinc-alloys --- electroplating --- aerospace --- epoxy marine coatings --- accelerated ageing tests --- thermal cycling --- EIS --- corrosion degree --- steel --- microbiologically influenced corrosion --- biofilm --- bacterial activity --- mooring chain --- SEM --- corrosion fatigue --- twin wire arc spraying --- machine hammer peening --- ZnAl4 coating --- marine application --- corrosion protection --- cathodic protection --- calcareous deposit --- marine renewable energy

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Active (also called “smart”) coatings and thin films are defined as those that are capable of sensing their environment and appropriately responding to that external stimulus. This Special Issue “Active Organic and Organic-Inorganic Hybrid Coatings and Thin Films: Challenges, Developments, Perspectives” collected a series of papers that outline the current frontiers in the development of smart coatings and thin films for corrosion and other types of materials applications. The first four papers focus on novel discoveries on coatings with corrosion protection properties. These include environmentally-friendly polyurethane loaded with cerium nitrate corrosion inhibitor for mild steel protection, hot-pressed organic polymer coatings for the protection of pre-treated aluminum alloy surfaces exposed to NaCl aqueous solutions, functional epoxy coating with modified functional TiO2 for steel substrates protection, and hybrid composites against the thermo-oxidative corrosion of the metal parts of the internal combustion engines, turbines, and heaters. The next paper explores the potential of organic polymer/ceramic composite coatings to enhance the scratch resistance of typical floor laminates. The next three papers highlight other types of smart coatings and thin films, including low-temperature curable hybrid dielectric materials for field-effect transistors, bilayer antireflective coatings for optoelectronic devices, and organic polymers as the thin-film component for enthalpy exchanger systems in air conditioning applications. The final two papers focus on important research specific to coatings that serve as protection and preservation cultural heritage materials.

Research & information: general --- high-temperature coatings --- corrosion protection --- powder coatings --- scale inhibition --- anti-corrosion --- mesoporous TiO2 whiskers --- organic coatings --- mild steel --- waterborne polyurethane --- corrosion --- cerium nitrate --- coating --- HVAC --- SPEEK --- cross-linking --- INCA method --- thin membranes --- high DS --- refractive index --- deposition angle --- wavelength --- antireflective --- omnidirectional --- nanostructures --- thermal stability --- high pressure laminates (HPL) --- overlay --- alumina --- functionalization --- silane coupling agent --- scratch resistance --- scratch visibility --- scratch hardness --- organic thin-film transistors --- dielectric --- organosilicate --- copolymer --- poly(phenylene methylene), aluminum alloy --- AA2024 --- coatings by hot pressing --- additives --- fluorescence --- waterborne coatings --- batch miniemulsion --- weathering --- stone preservation --- coatings --- nanosilica --- nano-TiO2 --- nano-clay --- stone conservation --- wood protection