Corrosion mapping using point-by-point manual UT measurement is slow, coverage-limited, and dependent on operator consistency. It produces a grid of discrete readings across an area that may contain thousands of square millimetres of uninspected surface between each measurement point. Robotic arm UT corrosion mapping replaces the grid with continuous encoded coverage — scanning every square millimetre of the nominated inspection area at defined index pitch, producing 2D C-scan and 3D wall thickness maps that reveal the full spatial distribution of metal loss.
100% Area Coverage at Defined Scan Pitch
The robotic arm executes a programmed scan path across the inspection
area — maintaining consistent probe contact, controlled scan pitch, and
continuous data acquisition at every point. No areas are missed. Coverage is
confirmed from encoder position data, not assumed from operator pass count.
2D C-Scan
and 3D Thickness Visualisation
Scan data is processed to produce colour-coded 2D C-scan images of wall
thickness across the entire scanned area — identifying minimum thickness zones,
corrosion distribution patterns, and remaining wall gradients that are
invisible in point measurement reports. 3D surface models can be generated from
the same dataset for engineering review and FFS input.
Repeatable Between Inspection Intervals
Robotic scan programmes are reproducible — the same programme can be
re-executed at successive inspection intervals, producing directly comparable
datasets for corrosion rate determination, growth trend analysis, and remaining
life calculation from measured data rather than estimated averages.
Multiple UT Modes
Conventional pulse-echo UT, PAUT, and TOFD
corrosion mapping configurations are all deployable on the robotic arm platform
— enabling wall thickness mapping, lamination screening, and active crack
detection in a single or combined deployment.
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Pressure vessel shell and head corrosion mapping
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Storage tank shell wall thickness mapping
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Heat exchanger shell-side corrosion assessment
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Pipe
elbow and fitting corrosion characterisation
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Structural steelwork and deck plate corrosion mapping
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Corrosion growth trending between planned inspection
intervals
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Fitness-for-service corrosion assessment input — API
579 / ASME FFS-1
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Post-CUI removal surface condition mapping
Reports include colour-coded 2D C-scan thickness maps, 3D visualisation
of wall thickness distribution, minimum thickness identification, area-averaged
and point minimum thickness statistics, and remaining life estimates where
corrosion rate data is available from previous inspection intervals. All
outputs are referenced to the component nominal geometry and formatted for FFS
assessment and integrity management records.