You wish to perform an impedance measurement of your materials
What is the impedance measurement?
Electrochemical impedance measurement (EIS) is a non-destructive, extremely sensitive analysis method that allows the characterization of the electrochemical properties of a material or a system as a function of the excitation frequency. It aims to detect defects in protective coatings, evaluate the homogeneity of the layers and study surface corrosion phenomena.
Electrochemical characterization and impedance measurement can be applied to many industrial sectors, from aeronautics to cosmetics, including energy and medical devices.
Why perform an electrochemical impedance measurement?
Evaluate the corrosion resistance of a metal or an alloy
Test the effectiveness of an anticorrosive coating or a paint
Characterize passive films on metal surfaces
Control the degradation of electrolytes, batteries or sensors
Study diffusive, capacitive or resistive behaviors in a system
The FILAB laboratory supports you in the impedance measurement of your materials
Why choose FILAB for impedance measurement?
FILAB, a laboratory made up of experts in metallurgy and steelmaking analysis, provides its knowledge and expertise to carry out impedance measurement and electrochemical characterization of your metal parts.
To support you in the best conditions, the FILAB laboratory is approved Research Tax Credit (CIR) and accredited COFRAC ISO 17025.
ANALYTICAL TECHNIQUE
Electrochemical impedance is a non-destructive method that analyzes the properties of interfaces between a material and its electrochemical environment. By applying an alternating signal, it measures the resistance and ability of a system to conduct loads. This technique is essential for evaluating the stability of protective coatings and the durability of biomaterials, such as medical implants, by providing valuable information on long-term mechanisms.
Why perform an impedance measurement?
Performing an impedance measurement – electrochemical analysis on materials allows meeting industrial challenges:
Impedance measurement identifies degradation mechanisms, such as corrosion, and allows for the selection or improvement of materials to better withstand specific conditions.
This measure also allows the development of more efficient materials (conductivity, resistance, protection) and to prevent failures, thus reducing costs related to maintenance, replacement, and business interruptions.
Thanks to a better understanding of electrochemical reactions, industrialists can design innovative solutions (alloys, coatings) while ensuring that products comply with current standards.
our analysis services
Measurement of the free potential (OCV) to evaluate the spontaneous electrochemical behavior of a metal in a given medium (water)
Study of galvanic coupling in order to analyze the interactions between two metallic materials to identify differential corrosion risks (ex: Zinc vs Steel)
Characterization of protective properties: barrier properties, porosity, water permeability, delamination, filamentary corrosion... ,
Determination of the corrosion rate (LSV) in order to know the corrosion rate (mm/year) in various environments (salt water, pure water, inhibitor presence)
Measurement of corrosion potential (polarization curves)
Development of specific electrochemical tests (cathodic delamination, ACET, corrosion at the edges ...)
FAQ
The impedance measurement applies to:
- Bare or treated metals (steel, stainless steel, aluminium, copper, titanium, etc.)
- Organic coatings (paints, varnishes, polymers)
- Surface treatments (anodisation, passivation, phosphatization, etc.)
- Composites or functional materials (batteries, electrodes, sensors...)
Unlike destructive tests like salt spray, the EIS is non-destructive, fast and more sensitive. It allows for:
- Detect the first signs of degradation before they are visible
- Compare systems or formulations without waiting several weeks of testing
- Follow the evolution of a material over time
Depending on the sector, several standards can frame the trial:
- ISO 16773: for organic coatings on metals
- ASTM G106 / G200: for corrosion by EIS
- Client internal standards or specific R&D protocols
