A Fitbit for aging bridge foundations.
DeltaX combines a long-term marine corrosion simulation with an experimental hardware monitor. Explore how published corrosion rates affect wall thickness across decades, then view ESP32-C3 / VL53L0X surface-distance readings when hardware is connected.
Underwater steel is checked periodically. Corrosion continues between inspections.
A few readings during a dive inspection can miss how loss varies from one location to another. DeltaX makes those assumptions and readings easier to explore.
The regular maximum interval for underwater bridge inspections is 60 months. Some qualifying bridges may use up to 72 months under specified conditions.1
A 2002 FHWA report estimated this annual direct cost for U.S. highway bridges using 1998-era data. User delay and productivity costs were estimated separately.2
SCI P422 temperate marine design means, per exposed steel face. Localized accelerated low-water corrosion can be much faster.3
Explore the model. Inspect the prototype.
The simulator and hardware monitor show different kinds of information, clearly labeled for what they are.
Model corrosion over time
The simulation applies published marine corrosion baselines to illustrative bridge locations. Histories are generated scenarios, not real inspection records.
Compare loss by location
Review remaining thickness, absolute loss, and percentage loss across starting wall thicknesses and exposure zones.
View hardware readings
When connected, the monitor displays raw and filtered VL53L0X surface distance—not validated thickness measurements.
Default simulator scenario · generated readings, not field data