All real measured records from the cited open database (Nyby et al., Scientific Data 2021, CC BY 4.0). Search by alloy or UNS, filter by metric, and click Assess → to load any record's composition into the tool.
Microstructure-aware, probabilistic prediction of pitting, chloride-SCC and sour cracking — plus cost-aware CRA selection. Runs entirely in your browser.
All real measured records from the cited open database (Nyby et al., Scientific Data 2021, CC BY 4.0). Search by alloy or UNS, filter by metric, and click Assess → to load any record's composition into the tool.
Thirteen cited engines across four engineering workflows — every output traceable to a primary standard (ASME · NACE · DNV · ISO · API · ASTM · MIL-STD). 5,500+ in-Chrome assertions verify known-answer worked examples, monotonicity invariants, and boundary gates against published values.
Composition → PRENN16 → CPT (Nyby 2021 LOO-calibrated, MAE 6.6 °C) → P(pit) with credible interval. σ-phase and sensitization from thermal/weld history; effective-local-PREN coupling degrades CPT — the microstructure-aware link no off-the-shelf tool carries. Cl-SCC + sour SSC envelopes per ISO 15156-3. Multi-grade compare; cost-aware "cheapest grade that clears." Assess · Select · Compare · Selection map · Browse data tabs
ASME B31G / Modified B31G (Kiefner & Vieth 1989 — RSTRENG-derived 0.85 dL) corroded-pipe fitness for service with the Folias bulging factor. Remaining-life per API 570 / 510 conventions. ILI batch upload: paste a vendor CSV (ROSEN / Baker Hughes / NDT Global), get a sorted color-coded grid of PASS / MONITOR / REPAIR / IMMEDIATE per defect. CUI risk per API 583 + NACE SP0198 with ASTM C871 leachable-chloride amplifier for SS ext-CSCC. RBI 5×5 screen per API RP 581. Integrity · ILI batch tabs
Sacrificial anode sizing per DNV-RP-B401 §6/§7/§10 across 31 environments (T / depth / salinity / O₂ / ρ context), 15 coating systems, 11 NACE SP0387 anode alloys. AC corrosion (ISO 18086 holiday model) + AMPP SP0169 CP-criteria check. Galvanic couple from a 68-alloy ASTM G82 / MIL-STD-889C series with mixed-potential Tafel I_corr (ASTM G102) returning actual mm/yr penetration on the anode. Groundbed resistance per Dwight 1936 (vertical / horizontal) + Sunde 1949 (n-rod). CP / AC tab
CO₂ corrosion: 5-model comparator (de Waard 1975 + 1995, NORSOK M-506:2017, Nesic Multicorp, Multicorp-FreeCorp) plus API RP 14E erosional-velocity check. HIC / SOHIC per NACE MR0103-2018 + TM0284-2016 + ISO 15156-2 (0.34 kPa pH₂S gate) with explicit mitigation hierarchy. MIC families (SRB / APB / IRB / SOB) per NACE TM0194 / TM0212 / SP0775. Sour-service envelope per NACE MR0175 / ISO 15156 with H₂S-CO₂ regime mapping. Energy-transition coverage: scCO₂ + H₂ embrittlement. CO₂ · Integrity tabs
Outputs are downloadable: print-to-PDF (clean single-card layout per tab), per-tab XLSX (multi-sheet: Inputs / Results / Citations), or CSV. Pure calculation + cited reference — no stamp ceremony.
PitCast began as the CRA-selection layer of a validated Python research package and grew into a pipeline / materials / corrosion-engineering screening console — the kind a working PE or AMPP Corrosion Specialist keeps open in a browser tab next to AutoCAD, Caesar II, and the spec book. Every engine is in-browser vanilla JS; no server, no account, no telemetry. Every dataset entry is either cited to a primary standard or flagged as screening.
Each capability is validated against its standard's worked example where one exists: ASME B31G Appendix B Ex 1 (54.3 / 55.6 bar Psafe); NACE SP0169 Appendix-A groundbed (13.72 Ω); DNV-RP-B401 1-km × 12-in offshore pipeline (4,754 kg Al-Zn-In); LaQue marine 316L bolt in CS flange (~1.16 mm/yr CR); Nyby et al. 2021 Scientific Data 8, 58 (CC BY 4.0) LOO calibration on n=51 G48 records. Monotonicity invariants enforced everywhere (deeper defect ↓ Psafe, more chloride ↑ pitting, more cathode area ↑ galvanic rate, higher pH₂S ↑ HIC, etc.).
B31G FFS: ASME B31G-2012 §2-3 · Kiefner & Vieth 1989 (Battelle PR-3-805) · Folias 1965 Int J Fract Mech 1, 104 · API 5L · API 570/510.
Anode sizing: DNV-RP-B401 §6/§7/§10 (Tables 7-1, 10-1, 10-2) · NACE SP0387 (offshore cast anodes) · NACE SP0169 (buried steel) · NACE SP0572 (Mg anodes) · NACE SP0490 / SP0492 / SP0212 + ISO 21809 + AWS C2.18 (FBE / 3LPE / TSA).
CUI: API RP 583 §4.3-4.4/§5 · NACE SP0198-2017 · API RP 581 (intervals) · ASTM C871 leachable Cl · ASTM C449/C547/C552/C591/C610/C612/C1126/C1728/C1136 · ISO 9223.
Galvanic: ASTM G82-98(2014) · ASTM G102-89(2015) · MIL-STD-889C · NACE TM0394 · LaQue 1975 Marine Corrosion Ch.6 · Stansbury & Buchanan 2000 Ch.4 (mixed-potential) · Trethewey & Chamberlain 1995 Tab 3.4 · ISO 12473.
Groundbed: Dwight 1936 AIEE Trans 55, 1319 · Sunde 1949 (Van Nostrand) · NACE SP0169 §6.5 · IEEE Std 81.
HIC / SOHIC: NACE MR0103-2018 · NACE TM0284-2016 (CLR ≤ 15% / CTR ≤ 5% / CSR ≤ 2%) · ISO 15156-2 §A.2/§B · API RP 571 §5.
RBI: API RP 581 (3rd ed., 2016) Parts 1-3 · API RP 580 · API 510 / 570 interval caps.
MIC: NACE TM0194 (planktonic) · NACE TM0212 (sessile/pipeline) · NACE SP0775 (coupons) · NACE SP0106 §6.
CRA / CPT: Nyby et al. 2021 Sci Data 8, 58 (LOO calibration n=51) · ASTM G48 (6% FeCl₃) · ISO 15156-3 · NACE MR0175 · WRC-1992 ferrite diagram.
CO₂ corrosion: de Waard & Milliams 1975/1995 · NORSOK M-506:2017 · Nesic Multicorp · Crolet & Bonis 1983 (in-situ pH) · API RP 14E (erosional velocity).
CP / AC: AMPP SP0169 · ISO 18086 (AC-corrosion holiday spread-resistance model).
Independent literature data points the models are checked against — each row links to its primary source.
⚠ Screening / research-grade. The CRA-selection CPT correlation is statistically calibrated (Nyby 2021 LOO MAE 6.6 °C — close to the intrinsic lab-to-lab scatter of CPT measurement). Other engines reproduce their cited standard's worked examples within ~2% but are flagged as screening where vendor-batch polarisation data, full-table damage factors (e.g. API 581 detailed DFM tables), or site-specific environmental measurements would normally be used in detailed design. Not a substitute for qualified materials engineering, standards compliance, or testing. Do not use unsupervised for design.
© austenite.org · PitCast — corrosion & integrity console for metallurgists, FEED engineers, AMPP corrosion specialists, and PE pipeline-integrity engineers.