Corrosion Engineer Notes on iPhone: Inspection Findings, CP Readings & Failure Analysis

Corrosion engineering is the discipline of managing material degradation across systems where failure consequences range from operational disruption to catastrophic release. A pipeline that looks sound above grade may have significant wall-loss that a field inspection note — with photo, reading, and location — can catch before it becomes an incident. Nemos gives corrosion engineers a place to capture that evidence as they work, not after they're back at the office.

Why Corrosion Engineers Need Structured Field Notes

Corrosion assessment involves overlapping data streams: visual inspection, wall thickness measurements, coating condition surveys, cathodic protection readings, and corrosion coupon analysis. The challenge isn't collecting the data — it's maintaining the context that makes data interpretable: - Which section of pipeline had the anomalous UT reading - What the surface preparation looked like before coating was applied - What the CP potential was before and after rectifier adjustment

Without contextual notes, data points are hard to correlate. With them, patterns emerge.

What to Capture in Nemos

Visual Inspection Observations Document conditions at each inspection point: - Location reference (GPS coordinate, chainage, facility identifier) - Corrosion type observed (pitting, crevice, galvanic, MIC, erosion-corrosion) - Extent and distribution estimate - Pit depth assessment (if measurable in field) - Any evidence of active corrosion vs. historic damage - Adjacent conditions contributing to corrosion (standing water, insulation condition, soil contact)

Attach photos to each inspection note — visual documentation of corrosion morphology is irreplaceable.

Coating Inspection Notes For coated structures and equipment: - Coating type and estimated age - Holiday detection results (wet sponge, high-voltage, percentage defect area) - Adhesion assessment (pull-off test value if measured) - Any mechanical damage, weathering, blistering, delamination - Disbondment pattern and extent

Coating condition notes feed the repair prioritization and re-coating cycle planning.

Cathodic Protection Readings Log CP survey data with context: - Measurement date and time - Location and structure identifier - Pipe-to-soil potential (on-potential and instant-off) - Rectifier output (voltage and current) - Any anomalies (shorted casing, interference, holiday in coating)

Trend lines across multiple surveys reveal whether protection is improving or degrading — only visible with consistently documented readings.

Corrosion Monitoring Records For chemical injection, inhibitor dosing, or coupon-based monitoring: - Coupon exposure period - Mass loss measurement and calculated corrosion rate - Inhibitor dosing rate at time of coupon exposure - Fluid composition changes during exposure - Comparison to target corrosion rate

Monitoring records document program effectiveness and justify dosing changes.

Failure Investigation Notes When a corrosion-related failure occurs: - Component description and service history - Environmental conditions at failure location - Failure morphology (fracture surface, corrosion product, wall-loss pattern) - Contributing factors assessment - Immediate mitigation and long-term recommendation

Anonymized failure notes become a career-long reference library for similar future investigations.

Regulatory and Fitness-for-Service Notes

For structures subject to fitness-for-service assessment (API 579, ASME B31G): - Anomaly dimensions (length, width, depth) - Reference wall thickness - Operating conditions at assessment time - Assessment level and result

Keep a reference note with the applicable assessment methodology sections you regularly use — faster than re-reading the standard each time.

FAQ

Can I use Nemos offline in remote pipeline environments? Yes. Nemos works fully offline. Notes sync to iCloud when connectivity is restored.

How do I handle photos from inspection instruments? Transfer photos from dedicated inspection cameras to iPhone and attach to the relevant site note. Nemos handles any image format iOS supports.

What about corrosion rate trend tracking — does Nemos do calculations? Nemos is a notes app, not a corrosion monitoring database. Log raw readings in Nemos for field context; use your corrosion monitoring software for trend calculation and reporting.

How do I organize notes across hundreds of inspection points? Use consistent title conventions with location identifier and inspection date. Tags by asset type (pipeline, tank, structure) add a fast filter axis. Search finds any location or anomaly description instantly.

Can I attach UT thickness readings to notes? Yes. Manual entry of UT readings alongside the location context is more useful than a raw data file with no context. Note the instrument, probe, and coupling method for data defensibility.

Why not just use the field inspection app? Structured field apps capture standard data fields. Nemos captures the non-standard observations — the engineer's judgment, the contextual detail, the anomaly that doesn't fit the form — that make inspection data actionable.

Related Reading

• /blog/materials-engineer-notes-iphone — failure analysis documentation and metallurgical observation records
• /blog/safety-officer-notes-iphone — compliance documentation and hazard observation records
• /blog/geotechnical-engineer-notes-iphone — field observation and site condition documentation
• /blog/quality-control-inspector-notes-iphone — systematic inspection documentation patterns

Sources

• Corrosion inspection documentation practices: NACE SP0169 (Control of External Corrosion on Underground Pipelines)
• Fitness-for-service assessment: API 579-1/ASME FFS-1

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