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Advanced integrative solutions to Corrosion problems beyond micro–scale: towards long-term durability of miniaturized Biomedical, Electronic and Energy systems

Periodic Reporting for period 1 - mCBEEs (Advanced integrative solutions to Corrosion problems beyond micro–scale: towards long-termdurability of miniaturized Biomedical, Electronic and Energy systems)

Reporting period: 2017-10-01 to 2019-09-30

mCBEEs ITN is a joint venture between academy and industry with a primary goal to train young researchers in the field of corrosion and corrosion protection at micro- and nanoscale. The network focuses on the study of corrosion mechanisms beyond microscale of components in miniaturized systems in different environments using localized techniques, and the development of multifunctional protective coatings to increase the long-term durability of such components. Three main strategic application fields where corrosion could seriously compromise the performance of micro- or nanodevices have been identified: biotechnology, electronics and energy technology.
mCBEEs brings together 15 beneficiaries and 4 partners. The Consortium complementarity enables a highlevel, multifaceted educational programme, where specials efforts will be done to bridge fundamental research with industrial applications.
The overall long-term research aim of the mCBEEs project is to study and evaluate corrosion issues in technologically relevant micro- and nanostructured components and to provide effective solutions for the prevention of corrosion. As such, 6 specific research objectives underlie this overall aim:
RO.1. To study the micro- and nanoscale corrosion mechanisms using localized techniques.
RO.2. To model corrosion processes at the microscale.
RO.3. To develop and characterize the protective multifunctional coatings on selected miniaturized systems.
RO.4. To develop corrosion resistant biomedical devices.
RO.5. To develop corrosion resistant micro- and nanoelectronics devices.
RO.6. To develop corrosion resistant electrochemical energy conversion systems.
Recruitment: 15 ESRs have been recruiting after a selection procedure among 475 applications. The recruiting process ended on M18.
Training: 3 training events have been organized so far: 1) Fundamentals of electrochemistry and corrosion mechanisms – TUD 15-20/07/2018, 2) Structural, mechanical and surface analytical techniques – JTH 6-9/11/2018, 3) Fundamentals of corrosion protection and coatings production – JSI 24-29/06/2016.
Research activities:
WP2: The corrosion mechanisms in the three application fields have been studied. In particular, localized electrochemical techniques were used to evaluate: 1) the interactions of bovine serum albumin on the passive film and the corrosion resistance of implantable alloys during immersion in solutions simulating body fluids, 2) the corrosion resistance and corrosion mechanisms of the contact tracks of SD memory cards, 3) the corrosion resistance of PVD coated fuel cells bipolar plates.
WP3: A Dynamic Electrolyte Film Model has been developed which numerically simulates the thickness evolution of a uniform thin electrolyte layer due to condensation/evaporation of moisture. Thin film experiments are carried out to validate this model. Gathering experimental information about pits distribution on aluminium alloys under potentiostatic polarization. These data will be used to develop a mathematically sound deterministic pitting corrosion model.
WP4: Different types of coatings have been developed for different applications in the three application fields. In particular, ALD Al2O3 and HfO2 coatings have been applied on 316L stainless steel and commercially pure Ti, chitosan based coatings have been developed aimed to reduce the corrosion rate of biodegradable Mg alloys, Ni-Sn and Ag coatings have been produced by electrodeposition from ionic liquids and Ce based conversion coatings have been developed and studied to protect aluminium alloys.
WP5: Ferromagnetic-ferroelectric multilayers, CoFe2O4-BaTiO3 (CFO-BTO) on MgO substrate, were deposited using Pulsed Laser Deposition (PLD) technique. Electrolytic anodization has been used in order to create nanotubes arrays on Ti6Al4V implantable alloy to enhance osteointegration and to decrease the microbial risk. Rat organotypic cultures as model of epilepsy have been successfully established in culture.
WP6: The corrosion resistance of intraocular pressure sensors has been evaluated. Integrated multifunctional hinged nanorobots with high biocompatibility has been produced consisting of a magnetic Ni head and a Rh tail connected with a deformable hinge.
WP7: Electrodeposition of Ni-Pt porous film, anodization fo Ni foams in molten salts and template assisted electrodeposition to produce free-standing nanowires are the techniques which have been used in order to obtain high active surface and corrosion resistant electrodes.
Dissemination:
3 peer reviewed published papers and 34 oral and poster presentations to international conferences have been produced. All ESRs participated at EastForum 2019 which was embedded in Electrochem 2019 conference. The mcbees activities were also reported in bulletins of scientific and technical journals of industrial associations and continuously through the web site of the project, on facebook, twitter and linkedin pages.
Within the first 24 months the research activities lead to different scientific advances such as:
-Study of the effect of protein absorption on implantable metal parts with localized techniques.
-Production of ferromagnetic-ferroelectric multilayers, CoFe2O4-BaTiO3 (CFO-BTO) on MgO substrate.
-Study of the degradation of electronic components with localized techniques
-Production of self standing Ni nanowires and mesoporous Ni-Pt films
-Production of multifunctional hinged consisting of a magnetic Ni head and a Rh tail connected with a deformable hinge
-Study of the corrosion resistance of bipolar plates used in fuel cells
-Fabrication of Ni-Sn alloy and Ni-Sn/reduced graphene oxide composite coatings using ionic liquids
-Production of chitosan based composite coating on biodegradable Mg alloys
-Study of the role of intermetallic in Al alloys on the deposition of Ce based conversion coatings
-Deposition of Al2O3 and HfO2 thin film on implantable alloys by ALD
-Combination of ALD deposition and anodization of Ti to coat self-organized nanotubular structures
The expected results till the end of the project are:
-Understand the corrosion mechanism in micro and nanodevices used in the electronic and biomedical field and in energy conversion systems
-Individuate the limitations of the localized techniques to monitor corrosion on real micro- and nanodevices
-Development of a numerical model to study corrosion in systems with decreasing electrolyte layer thickness and implementation and validation of a deterministic pitting corrosion model
-Development of ALD inorganic-organic coatings, chemical or electrochemical treatments for Al and Cu alloys, antibacterial and corrosion resistant surface treatments for implantable metal alloys, coatings on biodegradable Mg alloys which limit the dissolution rate of Mg in the body,
-Production of rolled up three dimensional multiderroic electrode microsystems for neural cell stimulation, micro- and nanoporous metallic films for energy applications
-Long term assessment of nervous tissue response to implantable micro-electrodes and Establishment of brain organotypic cultures as 3D models to test biocompatibility and electrochemical properties of materials and coatings for implantable microelectrodes
-Fabrication of nanowire-based electrodes for supercapacitors
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