Functional coatings

Nanocomposite functional coatings

Nazwa programu i projektu: Program operacyjny Polska Wschodnia, „Nanokompozytowe powłoki funkcjonalne na osnowie metaliczne”

Nazwa beneficjenta: coat-it sp. z o.o.  Wartość projektu: 1 156 512 pln  Wartość dofinansowania: 904 170,50 pln  Okres realizacji: 2020-2022

Projekt współfinansowany przez Unię Europejską ze środków Europejskiego Funduszu Rozwoju Regionalnego w ramach programu Polska Wschodnia, oś priorytetowa 1 Przedsiębiorcza Polska Wschodnia, działanie 1.1 Platformy startowe dla nowych pomysłów, poddziałanie 1.1.2 Rozwój startupów w Polsce Wschodniej.


Nanoadditives  for coatings

Nanoadditives for the preparation of metallic coatings

Program and project: Support for research and development projects in the preseed phase by proof of concept funds – BRIdge Alfa, Bridge Alfa by YouNick Mint – COAT-IT “Nanoadditives based on cerium, zirconium and silica for the preparation of metallic coatings”

Beneficiary: coat-it sp. z o.o.    Project cost: 1 000 000 pln    Funds: 800 000 pln   Time: 2020-2022

Project is co-financed by the European Union from the European Regional Development Fund under the Smart Growth program. Project developed as a part of the National Center for Research and Development competition: Support for research and development projects in the preseed phase by proof of concept funds – BRIdge Alfa.


Nazwa programu i projektu: Wsparcie Projektów badawczo-rozwojowych w fazie preseed przez fundusze typu proof of concept –  BRIdge Alfa, Bridge Alfa by YouNick Mint – COAT-IT „Nanododatki na bazie związków ceru, cyrkonu i krzemu do otrzymywania metalicznych powłok specjalistycznych”

Nazwa beneficjenta: coat-it sp. z o.o.  Wartość projektu: 1 000 000 pln  Wartość dofinansowania: 800 000 pln  Okres realizacji: 2020-2022

Projekt współfinansowany przez Unię Europejską ze środków Europejskiego Funduszu Rozwoju Regionalnego w ramach programu Inteligentny Rozwój. Projekt realizowany w ramach konkursu Narodowego Centrum Badań i Rozwoju: Wsparcie Projektów badawczo-rozwojowych w fazie preseed przez fundusze typu proof of concept – BRIdge Alfa.

Ni–P–ZrO2 composite coatings

Electroless deposition of Ni–P–nano-ZrO2 composite coatings in the presence of various types of surfactants

Ni–P–nano-ZrO2 coatings were produced using the electroless deposition technique. To prevent agglomeration of zirconia nanoparticles in the plating bath, various surfactant additives (anionic, cationic, and nonionic) were used. The most stable bath was obtained with the addition of dodecyltrimethylammonium bromide (DTAB). The impact of this surfactant on the deposition rate, coating composition, and topography, as well as f potential of particles, was examined. Surface morphology and composition of the Ni–P–nano-ZrO2 composite coatings was analyzed by various techniques including scanning electron microscopy (SEM) equipped with in situ energy-dispersive X-ray (EDX) spectroscopy. Coatings with a clearly greater amount of zirconia (21.88–22.10 wt.%) were obtained from baths containing DTAB in concentrations equal to or above its critical micelle concentration (cmc). For these surfactant concentrations, the reduction of Ni and P content was observed.

Inhibitor carriers for self-healing coatings

Gelatin microgels as a potential corrosion inhibitor carriers for self-healing coatings: Preparation and codeposition

Ni–P–nano-Co-deposition of a coating with capsules containing a corrosion inhibitor is one of the methods to protect the material surface against corrosion. This generation of coatings can be regenerated in response to mechanical or chemical damage. The paper presents a method for preparing gelatin microgels that can be eco-friendly corrosion inhibitor reservoir. The influence of temperature, stirring rate, an addition of surfactants (ionic and non-ionic) on microgel quality has been studied. It has been found that the microgels obtained at 80 8C from the solution containing non-ionic surfactant at concentration below its critical micelle concentration are the most stable and less polydisperse one. As a proof of concept, a Ni-P\gelatin microgels hybrid coating has been obtained by electroless method.

Nanogels at the air/water interface

Smart nanogels at the air/water interface: structural studies by neutron reflectivity

The development of effective transdermal drug delivery systems based on nanosized polymers requires a better understanding of the behaviour of such nanomaterials at interfaces. N-isopropylacrylamide-based nanogels synthesized with different percentages of N,N′-methylenebisacrylamide as cross-linker, ranging from 10 to 30%, were characterized at physiological temperature at the air/water interface, using neutron reflectivity (NR), with isotopic contrast variation, and surface tension measurements; this allowed us to resolve the adsorbed amount and the volume fraction of nanogels at the interface. A large conformational change for the nanogels results in strong deformations at the interface. As the percentage of cross-linker incorporated in the nanogels becomes higher, more rigid matrices are obtained, although less deformed, and the amount of adsorbed nanogels is increased. The data provide the first experimental evidence of structural changes of nanogels as a function of the degree of cross-linking at the air/water interface.

Evaluation of corrosion resistance

Corrosion resistance evaluation of Ni‐P\nano‐ZrO2 composite coatings by electrochemical impedance spectroscopy and machine vision method

Ni‐P\nano‐ZrO2 composite coatings were obtained on the AISI 304 steel substrate by the electroless method from a bath containing dodecyltrimethylammonium bromide (DTAB). This cationic surfactant prevents ZrO2 agglomeration in the bath and affects the ZrO2 content in the coating, hence it alters functional properties of the coatings. It has been found in this study that corrosion resistance of the composite coatings depends on the surfactant concentration in the bath. The estimation of corrosion resistance was carried out by electrochemical impedance spectroscopy. The degree of the sample surface coverage with corrosion products was determined by the machine vision method. The coating obtained from the 0.88 g/dm3 DTAB solution showed the best protective properties. The machine vision method was shown to be an effective complementary tool to evaluate protective properties of the coatings.

Self-healing coatings for corrosion protection

Development of self-healing coatings for corrosion protection on metallic structures

Inspired by biological systems, artificial self-healing materials are designed for repairing local damage caused by external factors. The rapidly expanding field of self-healing systems contains, among others, materials with well-defined surface properties. Undoubtedly, enhancing surface functionalisation, by applying smart coatings, enjoys an extensive interest. The self-healing ability is particularly essential property for corrosion protection strategies, especially when the use of one of the most effective corrosion systems, based on chromium(VI) compounds, is now banned by the current registration, evaluation, authorisation and restriction of chemicals legislation. Self-healing protective coatings are produced using macromolecular compounds, ceramics, metals and composites. Considering the wide range of available materials, the number of potential combinations seems to be unlimited. The self-healing action of such coatings is activated by appropriate stimuli: temperature changes, radiation, pH changes, pressure changes and mechanical action. In this paper, the research and practical implications of the various approaches to achieving self-healing functionality of protective coatings, as well as potential developments in this area, are explored.

Electroless self-healing Ni-P coatings

Surface functionalisation by the introduction of self-healing properties into electroless Ni-P coatings

Ni-P/alginate microgels coatings, as potential metallic protective coatings with self-healing properties, were deposited by the electroless method. The alginate microgels contained nickel chloride and sodium hypophosphite. It was proven that the reduction of nickel ions released from the microgels is possible on the steel and Ni-P coating surface. The self-healing effect of this system was studied by X-ray fluorescence (XRF), chronoamperometry and scanning vibrating electrode technique (SVET). An improved corrosion protection observed here is attributed to the reduction of nickel ions to metallic nickel on the tested surfaces. Differences in the surface concentration of nickel and phosphorous species in the corrosion tested coatings with and without microgels, as evaluated using X-ray Photoelectron Spectroscopy (XPS), provided substantial evidence for the formation of a Ni-P coating from the compounds included in the microgels.