{"abstention_reason":null,"arm":"SUBSTRATE_DIVERSE_P2","candidate_id":"deterioration_monitoring__engineering_design__SUBSTRATE_DIVERSE_P2","cell_id":"deterioration_monitoring__engineering_design","decision":"PROPOSAL","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","proposal":{"actors":["Thermal-fluid engineer responsible for the prototype cooling loop","Materials and corrosion engineer who specifies witness materials and validates damage measurements","Test engineer who installs, exchanges, and inspects the cartridge during qualification","Reliability engineer who compares witness deterioration with cold-plate inspection results","Laboratory safety officer who controls coolant handling and pressure-boundary modifications","Chief engineer who decides whether coolant chemistry, materials, joining methods, or qualification plans must change"],"affected_objective":"Preserve the leak-tightness and heat-transfer life of mixed-metal liquid-cooling hardware during engineering qualification and before design release.","arm":"SUBSTRATE_DIVERSE_P2","authority_safety":{"authorized_first_step":"The test engineer may install a low-pressure, externally isolated witness-coupon bypass cartridge on one nonflight qualification loop after pressure, materials-compatibility, and laboratory-safety review; results remain advisory during the pilot.","decision_authority":"Only the chief engineer, with materials, thermal-fluid, and safety concurrence through existing design-review authority, may change coolant chemistry, wetted materials, joining processes, operating limits, inspection scope, or release status.","excluded_actions":["Installing the cartridge in flight, production, medical, or customer-operated hardware","Allowing coupon fragments or corrosion products to enter the primary test article","Changing coolant formulation or adding inhibitors solely from an unconfirmed witness result","Automatically stopping qualification or releasing a design based on a sensor threshold","Treating an undamaged coupon as proof that inaccessible cold-plate passages are sound","Opening a pressurized or chemically hazardous cartridge outside the approved laboratory procedure"],"halt_rollback":"Isolate and remove the bypass cartridge if it leaks, changes loop pressure or flow beyond the approved tolerance, contaminates the coolant, or produces results that cannot be reconciled with reference measurements. Restore the validated bypass blank, collect and contain the cartridge and coolant for examination, and continue only under the preexisting qualification plan."},"baseline":"Mixed-metal cooling prototypes are presently evaluated through coolant-property checks, pressure tests, thermal performance measurements, and destructive examination at a few scheduled endpoints. These methods can confirm gross chemistry or discovered damage, but they may not reveal the accumulating corrosive attack inside narrow aluminum, copper, stainless-steel, and brazed passages early enough to distinguish a reversible coolant problem from a materials or joining-design failure.","candidate_id":"deterioration_monitoring__engineering_design__SUBSTRATE_DIVERSE_P2","causal_chain":["Heat, dissolved oxygen, ionic contamination, coolant decomposition, and mixed-metal galvanic couples gradually make the circulating fluid more aggressive.","Internal channels experience localized pitting, galvanic loss, braze attack, or deposit formation while the assembly can still pass pressure and thermal-performance checks.","A sidestream cartridge exposes replaceable coupons and representative joined specimens to the same coolant, temperature history, and electrochemical environment as the test article.","Physical mass loss, electrical-resistance increase, pit growth, surface deposits, and galvanic-current evidence make cumulative chemical attack observable without dismantling the cold plate.","Repeated cartridge exchanges and retained specimens reveal direction, persistence, rate, and acceleration rather than a single coolant sample or endpoint observation.","Material-specific warning bands identify a deteriorating environment while flushing, chemistry correction, targeted inspection, or material redesign remain feasible.","Validated threshold crossings prompt governed examination of the test article and a chief-engineer decision about coolant, materials, joints, operating conditions, or qualification duration.","Comparisons between witness damage and subsequent cold-plate examination recalibrate coupon selection, exposure duration, and action thresholds."],"cell_id":"deterioration_monitoring__engineering_design","consequence":"Without a representative cumulative-exposure witness, corrosive conditions may remain hidden until a cold plate leaks, fouls, loses heat-transfer performance, or is destructively opened, forcing late redesign and leaving the responsible chemistry-material interaction ambiguous.","diversity_from_prior_proposals":"P1 monitors calculated erosion of multidisciplinary design reserves across configuration revisions. This proposal addresses chemically driven deterioration inside a circulating physical cooling system, intervenes with an in-fluid sacrificial measurement cartridge, and follows a coolant exposure to coupon attack to inspection or materials-response pathway. It neither extends nor repairs P1's margin ledger.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","intervention":"Add a replaceable flow-through witness cartridge to a representative sidestream of one mixed-metal liquid-cooling qualification loop. The cartridge holds electrically isolated coupons made from the same aluminum, copper, stainless steel, braze alloy, coating, and dissimilar-metal junctions used in the cold plate, plus a filtered downstream trap. Establish unused-coupon mass, thickness, surface topography, electrical resistance, and joint condition as the baseline. Expose cartridges to controlled increments of thermal-cycle or pump operating time, then physically remove and inspect them for mass loss, resistance change, maximum pit depth, deposit loading, braze recession, coating undercut, and galvanic-current evidence. Define healthy, watch, warning, and unacceptable bands separately by material and damage mode. Shorten exchange cadence when attack accelerates or coolant conductivity, pH, dissolved-metal concentration, or filter loading changes concurrently. A warning triggers confirmatory metrology and targeted nondestructive inspection of the test article; a validated unacceptable condition enters design review for coolant replacement, flushing, inhibitor or material compatibility testing, joining-process revision, operating-envelope reduction, destructive examination, or redesign. Retained cartridges and endpoint cold-plate sections are compared to recalibrate sensitivity and response lead time.","mechanism_mapping":[{"counterfactual_removal":"Without the reacting coupons and joined specimens, bulk coolant readings can remain nominal while localized material attack accumulates in inaccessible passages.","mechanism_slug":"observability","role":"The cartridge converts an otherwise hidden coolant-material interaction into removable physical evidence of cumulative deterioration."},{"counterfactual_removal":"Without material-specific action bands, small pits, resistance changes, or mass losses can be repeatedly acknowledged without initiating confirmatory inspection.","mechanism_slug":"threshold","role":"Separates benign exposure, early warning, and unacceptable attack according to damage mode and remaining response time."},{"counterfactual_removal":"Without retained sequential cartridges, ordinary coupon variability or one contaminated sample could be mistaken for a deteriorating loop.","mechanism_slug":"state_and_state_transition","role":"Each exposure interval provides a defined physical condition state whose transition rate can be compared across thermal-cycle and operating-time increments."},{"counterfactual_removal":"Without routing validated witness damage to test-article inspection and design choices, the cartridge would document corrosion without reducing failure risk.","mechanism_slug":"feedback","role":"Connects measured chemical and material deterioration to coolant correction, inspection, qualification, and materials-design responses."},{"counterfactual_removal":"Without unused controls, chain-of-custody, exposure records, and confirmatory metrology, handling damage or coupon-batch variation could fabricate a trend.","mechanism_slug":"data_integrity","role":"Preserves comparability between baseline, exposed cartridges, coolant samples, and the applicable test configuration."},{"counterfactual_removal":"Without comparing cartridge indications against opened or nondestructively inspected cold plates, sensitivity could drift away from the protected component's actual condition.","mechanism_slug":"adaptive_capacity","role":"Uses observed correspondence and misses to change coupon geometry, materials, cadence, and thresholds as failure modes become clearer."}],"nearest_rivals":["Periodic bulk-coolant chemistry testing measures fluid properties or dissolved species but may miss localized galvanic, crevice, coating, or braze attack and does not directly record cumulative material loss.","A scheduled destructive teardown reveals actual internal damage but consumes the test article and may discover deterioration only after a long exposure interval.","A pressure-decay or leak test detects loss of boundary integrity after penetration or cracking, making it principally a late failure indicator.","A fixed coolant-replacement schedule acts without measured material condition and can replace benign fluid too early or aggressive fluid too late.","A corrosion model estimates compatibility from assumed chemistry and kinetics; the witness cartridge physically experiences the evolving loop environment and can reveal unmodeled contaminants or material interactions."],"negative_tests":{"intervention_falsifier":"The intervention fails if prespecified cartridge changes do not reproducibly precede or correlate with independently measured cold-plate attack, if handling and manufacturing variation dominate the signal, or if the cartridge alters local flow or electrochemistry so strongly that its deterioration is not representative.","problem_falsifier":"The problem is unsupported if bounded teardown records show no progressive internal attack, if observed failures are immediate random defects without measurable precursors, or if existing nondestructive and coolant tests already reveal and trigger action on the same deterioration with equal or greater lead time.","risks":["The cartridge may create a galvanic couple or crevice not present in the protected assembly and overpredict damage.","Coupon geometry and sidestream flow may underrepresent stagnation, heat flux, residual stress, or deposits inside real channels.","Corrosion products or coupon fragments could contaminate or obstruct the loop.","Opening the cartridge may expose personnel to hot, pressurized, toxic, or degraded coolant.","Mass-loss measurements can be distorted by deposits, cleaning technique, or handling damage.","Frequent exchanges may disturb the exposure environment and increase test burden.","A reassuring witness result may create false confidence about inaccessible localized defects.","Overly sensitive thresholds may drive premature coolant or materials changes."],"strongest_counterevidence":"Representative qualification history may show that corrosion is negligible within the intended life or that existing dissolved-metal analysis and nondestructive inspection consistently detect every actionable case earlier than a coupon cartridge; either finding would eliminate the claimed monitoring gap."},"next_evidence_step":"Build one laboratory-rated cartridge and run a bounded blinded comparison on three identical low-pressure bench loops: clean reference coolant, a prespecified mild contaminant condition, and a prespecified accelerated-aging condition. Use unused controls and two cartridge exchange intervals. Before examining the cold plates, have the materials engineer classify cartridge condition using fixed bands; then compare those classifications with blinded cross-section, pit-depth, deposit, and braze examinations of witness cold-plate sections. Record pressure drop, leakage, contamination, analyst time, false warnings, missed damage, and response lead time. Do not modify released hardware or production coolant specifications from this trial.","observable_state":"At each exposure interval, the loop has a traceable physical condition record comprising coupon mass and thickness change, electrical-resistance change, maximum pit depth and pit density, coating or braze recession, deposit and downstream-filter loading, galvanic-current evidence, coolant pH and conductivity, dissolved-metal concentration, accumulated hot hours and thermal cycles, current material-specific condition band, confirmatory-inspection result, and final disposition.","prior_art_status":"UNSEARCHED","problem":"During qualification of compact mixed-metal liquid cold plates, heat, oxygen ingress, ionic contamination, coolant decomposition, brazing residues, and dissimilar-metal couples can slowly produce pitting, galvanic corrosion, coating undercut, deposits, or braze attack inside inaccessible passages. The assembly can continue meeting pressure and heat-transfer requirements while wall thickness and flow cleanliness deteriorate. Sparse destructive teardowns and bulk-fluid samples may therefore discover the interaction only after substantial damage, when its cause and a low-cost corrective option are harder to isolate.","proposal_index":2,"remaining_contrastive_claim":"A removable, materially representative witness exposed to the circulating coolant will provide actionable evidence of cumulative localized attack before leakage, thermal degradation, or scheduled teardown, where bulk chemistry, pressure testing, and fixed endpoint inspection do not. The claim fails if the witness lacks lead time, correspondence, or added detection value.","revision_record":{"claim_changes":[],"conceptual_changes":[],"evidence_changes":[],"operational_changes":[],"parent_version":null,"progress_targets_addressed":["Materially separate the affected problem from P1's revision-level reserve erosion","Use measurement instrumentation and chemical-material interaction as the primary causal substrate","Preserve recurring inspection, trend interpretation, thresholds, response, and recalibration","Bound first-step authority to a reversible nonflight laboratory pilot"]},"schema_version":1,"structural_mapping":[{"archetype_element":"Condition to preserve","domain_realization":"Leak-tight, unobstructed, thermally effective wetted passages and joints throughout the intended cooling-system exposure."},{"archetype_element":"Baseline and condition bands","domain_realization":"Unused material-matched coupons establish mass, resistance, surface, coating, and joint baselines; material-specific bands distinguish negligible exposure, watch-level change, warning attack, and unacceptable damage."},{"archetype_element":"Leading and lagging deterioration indicators","domain_realization":"Leading signals include coupon resistance change, early pits, galvanic current, dissolved metals, conductivity change, and filter deposits; lagging signals include cold-plate wall loss, fouling, heat-transfer decline, and leakage."},{"archetype_element":"Recurring inspection cadence","domain_realization":"Cartridges are exchanged after defined hot-hour or thermal-cycle increments, with shorter intervals following accelerating or mutually corroborating signals."},{"archetype_element":"Trend interpretation","domain_realization":"Materials specialists compare damage rate, persistence, acceleration, localization, and agreement among physical, electrochemical, and coolant indicators across retained cartridges."},{"archetype_element":"Thresholds and escalation","domain_realization":"Watch bands increase observation; warnings require confirmatory metrology and targeted cold-plate inspection; validated unacceptable attack enters chief-engineer design review."},{"archetype_element":"Response pathway","domain_realization":"Responses can include flushing, coolant replacement, controlled inhibitor testing, contamination-source removal, material or coating substitution, joining-process revision, operating-envelope reduction, teardown, or redesign."},{"archetype_element":"Recalibration","domain_realization":"Correlation with nondestructive inspection and endpoint cross-sections is used to revise coupon materials, geometry, exchange intervals, warning bands, and required response lead time."}],"substrate_contract":{"counterfactual_independence":"Remove every dashboard, algorithm, database, automated alert, and digital controller: the essential intervention still works because representative coupons physically react with the coolant, are periodically removed, and can be weighed, electrically measured, and microscopically inspected against retained controls to reveal cumulative attack.","forbidden_channel_audit":"Governance supplies installation approval and design-response authority but does not generate the deterioration signal. Scheduling only determines when cartridges are exchanged. Software may store or plot measurements but is unnecessary to create or interpret the material evidence. No training, incentive, information-routing, model, or digital-control wrapper supplies the essential effect.","primary_allowed_process":"MEASUREMENT_INSTRUMENTATION"},"title":"Material-Matched Corrosion Witness Cartridge for Liquid-Cooling Qualification","version":0},"schema_version":1}