Track C · Technical
Chemistry, control, postures, withdrawals, self-criticism
Written for an electrochemist, a corrosion scientist, a reactor engineer and a process-control lead. The annexes that follow are the working depth. This track is the argument.
2 Al + 6 H₂O → 2 Al(OH)₃ + 3 H₂
2 Al + 4 H₂O → 2 γ-AlOOH + 3 H₂
~0.11 kg H₂ / kg Al · ≈ −418 kJ / mol Al, path-dependent
C1 Chemistry
Aluminium is a strong reductant. Water is an oxidant. The products are hydrogen and a hydrated aluminium oxide or hydroxide. Enthalpy is strongly exothermic. A civil plant is therefore a heat plant as much as a gas plant. Anyone who designs only for gas will meet the heat on the day.
The native film is the reason this is a process and not an accident. In water the outer part hydrates: boehmite, bayerite, gibbsite, depending on temperature, pH, time and ions. Thicknesses quoted in internal notes (2–5 nm barrier, 5–50 nm hydrate) are literature orders, not measurements of the group’s film.
Passivation can be broken. Liquid gallium and Ga–In eutectics penetrate grain boundaries and support continuous hydrogen evolution. That is Woodall, and it is prior art. It is also the economic hinge: if gallium dissolves into the residue and is not recovered, the process is a gallium process that happens to make hydrogen.
GALVANOXIDE, as filed, is a combination: promoter islands, a bilayer held on purpose, 20 kHz pulsed ultrasound at 20–23 W/L, a 1 kHz square-wave field, water access and temperature around 70 °C, and an impedance loop. Each actuator is Established in isolation. The combination is Filed. The combination on the group’s 25 L 316L skid is Not yet measured.
Safety, named because it is chemistry: hydrogen is flammable; aluminium dust and fines are a fire and explosion class of their own; the reaction can run away if the film is stripped faster than heat is removed. SIL-2 is a target in the filing, not a certificate. Atmospheric pressure is the civil design choice that keeps this out of 350–700 bar storage conversations.
C2 Control layer
The filed claim is not that EIS exists. It is that a feature vector taken during an Al–water reaction is a sufficient statistic for a model-predictive controller that sets ultrasound power, field waveform, feed rate and jacket temperature.
That claim is the difference between a batch recipe and a process. It is also the easiest claim to fake, because a spectrum always looks like it is saying something. WP2 exists to stop that. A pass that also appears in the blank is an artefact. A feature that does not move when yield moves is not a handle.
MPC, not PID-on-one-number, because the film has memory: hydration state, promoter distribution, local pH, temperature. No closed-loop run is on the record. Kitchen- table resistance switching on foil is not this loop, and is not a result.
What the control layer is not, on this ledger: a computer, a memristor product, a PUF, a sensor sold as a sensor, a temporal-reflection radio. Those sentences were written in March 2026. They live elsewhere, or they do not live.
C3 Four-posture claim tags
Claim ledger
| Claim | Posture | Basis |
|---|---|---|
| Aluminium metal reduces water, producing hydrogen and a hydrated aluminium oxide / hydroxide residue | Established — by others | Undergraduate thermochemistry. Theoretical yield ~0.11 kg H₂ per kg Al at STP (~1.24 L H₂ / g Al). |
| A native oxide film passivates aluminium in water and is the rate-limiting barrier | Established — by others | Classic corrosion science. Any useful Al–water hydrogen process is a process for managing that film. |
| Liquid gallium (and Ga–In eutectics) can keep aluminium from re-passivating | Established — by others | Woodall and co-workers (Purdue); subsequent Ga-activated aluminium literature. Prior art, not a group invention. |
| The oxide is a bilayer in water: a dense inner barrier and a hydrated outer shell | Established — by others | Alwitt, Diggle, the boehmite-sealing literature. Thicknesses are environment-dependent. |
| Boehmite (γ-AlOOH) and aluminium trihydrate are commercial products | Established — by others | Industrial ATH / boehmite markets. Residue valorisation is a commercial question, not a physics question. |
| Ultrasonic cavitation can disrupt surface films and accelerate heterogeneous reactions | Established — by others | Sonochemistry literature (Suslick and others). Not specific to GALVANOXIDE until measured in the group’s reactor. |
| Pulsed electric fields couple to the double layer and can alter oxide growth, wetting and local pH | Established — by others | Electrowetting, anodising and pulsed-electrolysis literature. General physics, not a measured result. |
| EIS reads the composite state of an oxide–electrolyte interface across a frequency sweep | Established — by others | Macdonald, Barsoukov. The group’s use of EIS as a process controller is the filed layer. |
| A managed bilayer with promoter islands, three actuators and an impedance-driven loop as a combination | Filed — not granted | Provisional families on the group register; twelve-month conversion cluster in April 2027. |
| Yield, residue phase, gallium recycle and closed-loop control on the group’s 25 L skid | Not yet measured | No run of board grade is on the record. WP0–WP4 exist to produce one, or to stop the programme. |
| Compute-as-product, temporal-reflection communication, oxide neural nets | Withdrawn | Retired from this ledger in September 2026. Other ledgers, or nowhere. |
C4 What would falsify this programme
Written so a specialist can disagree in writing. The honest answer, under the discipline the group now applies to every family: a civil hydrogen-and-residue process that works is enough to justify the measurement. A universal interface that has not been measured is not a process.
- 01The managed combination does not beat an unmanaged Al–water control, a Ga-only control, an ultrasound-off control or a field-off control. Decided by WP1.
- 02Gallium is consumed. Decided by a 100-hour mass balance. If it is consumed, the LCOH envelope is not the one on Track A.
- 03Residue is not phase-pure enough to sell. Decided by XRD and an impurity register.
- 04EIS features do not track yield. Decided by WP2. The control-layer filings are then not enabled by this film.
- 05Woodall and the Ga-activated literature anticipate the independent claims as restated. Decided by a clearance-grade search.
- 06The civil claim set is dual-use. Decided by counsel. Audience changes; physics does not.
- 07Dirty scrap cannot be made first-host class at a cost the residue will bear. Decided by a decoat campaign.
- 08The two-ledger rule is breached in an external room. Decided by QC halt. This paper is pulled.