GLOSSARY

Terms of art in green-transition metals.

Every term here is used in at least one article, dataset or specification on this site. Where a primary-source standard exists (ASTM, ISO, IEC), the glossary cites it.

NP1 nickel: Wrought nickel of ≥99.99 % purity to GOST 492-2006 specification. The apex of precision-nickel grades, suitable for electrolyser mesh, EMI shielding, aerospace wire looms and semiconductor substrates.
GOST 492: Russian standard for wrought nickel and nickel alloys, published 2006. Defines grades NP0 through NP5 with bounded trace-element composition. Widely referenced outside the former Eurasian bloc as the de-facto purity standard above 99.95 %.
Class-1 nickel: Refined nickel of ≥99.8 % purity, typically as cathode, briquette or powder. Input to battery precursor chemicals, precision alloys and electrolyser mesh. LME settlement price refers to this material.
Class-2 nickel: Ferronickel or nickel pig iron (NPI), 15–35 % Ni, used in stainless-steel production. Not substitutable for Class-1 applications without further refining.
Faradaic efficiency: The fraction of electric current in an electrolyser that converts into the desired chemical product (e.g. hydrogen). Benchmark figure 78 % for Class-1 alkaline cells, 94.3 % for NP1+RuO₂ cells, 96 % for platinum PEM cells.
Shielding effectiveness: Logarithmic measure in decibels (dB) of the attenuation of an electromagnetic wave passing through a conductive barrier. 60 dB = one-millionth transmission. 80 dB = one-hundred-millionth.
ASTM D4935: Standard Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials — the reference protocol for EMI testing on sheet and mesh samples.
ASTM B117: Standard Practice for Operating Salt Spray (Fog) Apparatus — the reference protocol for accelerated corrosion testing under controlled humidity and salinity.
IEC 62282: Fuel-cell-technologies family of standards covering performance and safety of fuel-cell and electrolyser systems.
BWM Convention: International Convention for the Control and Management of Ships' Ballast Water and Sediments — the IMO treaty that triggered the ~90,000-vessel filtration retrofit now underway.
RuO₂ coating: Ruthenium-oxide catalytic coating applied to nickel mesh substrates to reduce oxygen-evolution overpotential in alkaline electrolysis. Thickness typically 3–5 µm; loading ~10 g Ru per MW.
Overpotential: The voltage difference between the theoretical (thermodynamic) cell potential and the actual voltage required to drive an electrochemical reaction at a given current density. Lower is better.
Chain of custody: Documented trail of possession, location and handling of a material from source to finished product. For defence and aerospace contracts, auditable chain of custody is typically a contractual requirement.
ACRA: Accounting and Corporate Regulatory Authority — the Singapore statutory board responsible for company, public-accounting and corporate-service-provider regulation.
MAS: Monetary Authority of Singapore — the central bank and integrated financial regulator.
CSSF: Commission de Surveillance du Secteur Financier — the Luxembourg financial-sector supervisor, regulator of the group parent Alkemya Metacore SCSp.
ISIN: International Securities Identification Number — a 12-character alphanumeric code uniquely identifying a security. ISIN LU3192257148 refers to the digital security instrument of the group parent; this commercial-authority site does not.
CNAD: Classification Number of Admitted Documents — an identifier used by certain European securities frameworks for admitted instruments. GTX parent carries CNAD EAD-0029.
REE: Rare-earth elements — the 17 elements comprising the lanthanide series plus scandium and yttrium. Recovered from post-leach liquor using high-count precision filtration; a GTX application vertical.
EMI: Electromagnetic interference — unwanted electromagnetic emissions that couple into adjacent electronic systems. The mitigation of EMI is the primary application of high-count nickel mesh in defence and 5G infrastructure.