U-CROSS · Project

Smart Sensors That Catch Aircraft Corrosion Before It Becomes Dangerous

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Imagine your car rusting under the paint — you only notice when it's already bad. Aircraft have the same problem with corrosion hiding inside aluminum parts, and today's inspections only catch it once real damage has started. U-CROSS built special ultrasonic sensors that listen for the very first signs of corrosion starting and track how it spreads over time. They also created prediction software so maintenance teams can forecast when damage will become critical, instead of waiting for costly surprises.

By the numbers

corrosion mechanisms detected (pitting, intergranular, exfoliation, filiform, corrosion-fatigue, SCC)

consortium partners

countries involved (Spain, France)

total deliverables produced

NADCAP-accredited SME testing partner

The business problem

What needed solving

Aircraft operators currently cannot detect corrosion until it has already caused visible damage like cracks or material loss, because existing NDT methods cannot identify corrosion initiation or distinguish between different corrosion mechanisms. This means maintenance is reactive and expensive — parts get replaced too late or too early, both costing significant money and risking safety.

The solution

What was built

The project built ultrasonic corrosion sensors combining acoustic emission (passive listening) and pulse echo testing (active scanning), along with calibrated model witness blocks for sensor setup and a wizard-type software tool that lets end-users design sensor configurations and predict cycles before critical damage occurs. Demo systems with coatings and initial defects were produced for validation testing.

Audience

Who needs this

Airline MRO departments managing aging aluminum fleetsAerospace component manufacturers needing corrosion qualification testingNDT service companies expanding into continuous structural health monitoringMilitary aircraft maintenance organizations with long-service airframesAircraft leasing companies assessing airframe condition for asset valuation

Business applications

Who can put this to work

Aerospace MRO (Maintenance, Repair, Overhaul)

enterprise

Target: Aircraft maintenance companies and airline MRO divisions

If you are an MRO provider dealing with undetected corrosion in aluminum airframes — this project developed ultrasonic corrosion sensors combining acoustic emission and pulse echo testing that detect corrosion at its earliest stages. Instead of only catching damage once cracks or material loss appear, these sensors enable real-time monitoring and a prediction software tool that forecasts how many cycles remain before critical damage occurs.

Aerospace Component Manufacturing

mid-size

Target: Manufacturers of aluminum aircraft structures and panels

If you are a manufacturer of aircraft aluminum components dealing with corrosion qualification testing — this project developed calibrated 'model witness blocks' and test systems with coatings and initial defects. These allow you to validate corrosion resistance of your parts under real conditions using both indoor and outdoor test rigs, with sensor data tracking 6 different corrosion mechanisms including pitting, intergranular, and exfoliation.

NDT Equipment and Services

any

Target: Non-destructive testing companies and sensor manufacturers

If you are an NDT service provider looking to expand into continuous corrosion monitoring — this project validated ultrasonic corrosion sensors for real-time detection and created a wizard-type software tool that helps end-users design sensor setups and predict damage progression. The consortium includes a European leader in ultrasonic sensor manufacturing, meaning the technology path to commercial products is already mapped out.

Frequently asked

Quick answers

What would this sensor system cost compared to current inspection methods?

Based on available project data, specific pricing is not disclosed. However, the system is designed to reduce costs by catching corrosion at initiation rather than after structural damage occurs, which typically requires expensive repairs or part replacement. The wizard-type software tool is designed for end-users to configure sensors themselves, reducing dependence on specialist consultants.

Can this scale to monitor entire aircraft fleets?

The project validated sensors on indoor and outdoor test rigs with systems including coatings and initial defects. The technology combines passive monitoring (acoustic emission — always listening) with active inspection (pulse echo — on-demand scanning), making it suitable for both permanent installation and periodic checks across fleet assets. The consortium's 1 NADCAP-accredited SME partner provides a pathway to certified aerospace deployment.

Who owns the IP and how can companies license this technology?

The consortium of 6 partners across Spain and France jointly developed the technology. FUNDACION CIDETEC in Spain coordinated the project. Licensing and commercialization inquiries should be directed to the consortium — the objective explicitly states that the partnership was structured to 'guarantee the future commercialization of the result.'

Is this technology certified for use on real aircraft?

The project completed validation on test rigs with realistic conditions including coated systems with initial defects. Full aerospace certification (e.g., EASA approval) would require additional qualification steps beyond the project scope, but the involvement of a NADCAP-accredited testing partner signals alignment with aerospace quality standards.

How long does it take to install and get useful data?

Based on available project data, the sensors provide both cumulative monitoring and real-time data. The project developed calibrated model witness blocks for sensor setup, and the wizard-type software tool guides end-users through sensor design and configuration. Specific installation timelines are not disclosed in the project data.

Does this work with existing aircraft inspection workflows?

The system uses established NDT principles — acoustic emission and pulse echo ultrasonic testing — which are already standard in aerospace inspection. The innovation is combining them into continuous corrosion-specific monitoring with predictive capability, making integration with existing maintenance schedules a natural fit.

What types of corrosion can it actually detect?

The project explicitly targets 6 corrosion mechanisms: pitting, intergranular, exfoliation, filiform, corrosion-fatigue, and stress corrosion cracking (SCC). The calibration strategy accounts for the intrinsic features of each mechanism, meaning the sensors are tuned to distinguish between different damage types — something current NDT methods cannot do.

Consortium

Who built it

The U-CROSS consortium brings together 6 partners from Spain and France, with a balanced mix of 3 universities, 2 industry players, and 1 research organization. For a business considering this technology, two consortium members stand out: a NADCAP-accredited SME specializing in testing painted parts (critical for aerospace certification credibility) and a European leader in ultrasonic sensor manufacturing (meaning there is already an established production capability). The 33% industry ratio and the coordinator being FUNDACION CIDETEC — a well-known applied research center in Spain — suggest the project was designed with commercialization in mind, not just academic output.

FUNDACION CIDETECCoordinator · ES
UNIVERSITE DIJON BOURGOGNEthirdparty · FR
INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE LYONparticipant · FR
COMMUNAUTE D' UNIVERSITES ET ETABLISSEMENTS UNIVERSITE BOURGOGNE - FRANCHE - COMTEparticipant · FR
TITANIA, ENSAYOS Y PROYECTOS INDUSTRIALES SLparticipant · ES

How to reach the team

FUNDACION CIDETEC, Spain — applied research foundation specializing in surface engineering and materials

Order a report on this consortium See FUNDACION CIDETEC profile →

Next steps

Talk to the team behind this work.

Want to explore licensing U-CROSS sensor technology or integrating it into your MRO workflow? SciTransfer can connect you directly with the development team.

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