Pure Nickel Corrugated Mesh — 3D Flow Channel Design for Electrolyzer Water & Gas Distribution

A flat mesh moves electrons. A corrugated mesh moves electrons, water, and gas — in three dimensions. At Changzhou DLX Alloy Co., Ltd., our pure nickel corrugated mesh takes a flat woven or expanded nickel substrate and forms it into a precise wave profile — creating parallel flow channels that guide water to the electrode surface and sweep product gas away from it. Unlike machined bipolar plate flow fields that cost hundreds of dollars per plate, corrugated mesh delivers the same flow distribution function at a fraction of the cost — and unlike flat mesh that relies on random gas release paths, the engineered corrugation geometry ensures every square centimeter of electrode area sees both fresh water delivery and unobstructed gas removal. Custom pitch, amplitude, sheet size, and substrate type produced to your electrolyzer cell design.

In a PEM electrolyzer operating at 2 A/cm², the anode produces approximately 12 milliliters of oxygen per minute per square centimeter of active area. That oxygen must escape from the catalyst layer, through the porous transport layer, and out of the cell — all without blocking fresh water from reaching the catalyst. A flat mesh offers a 2D plane: water and gas compete for the same space, in the same plane, creating mass transport limitations that cap current density.

A corrugated mesh separates the flows into two functional zones: the channel valleys carry water to the electrode, and the channel peaks create headspace for gas to collect and exit. The corrugation pitch determines how many parallel flow paths exist per centimeter of electrode width. The corrugation height determines the cross-sectional area of each flow channel — and therefore the maximum gas flow rate before bubble coalescence blocks the channel. Together, pitch and height define the flow field hydraulics — and they are both parameters you specify on your drawing.

• Engineered flow, not random channels — Flat mesh between a bipolar plate and an electrode creates random contact points. Water finds the path of least resistance. Gas bubbles accumulate in dead zones. Corrugated mesh creates deterministic parallel channels — every square centimeter of electrode sees the same water supply pressure and the same gas removal path. Current density uniformity improves. Hot spots from local water starvation disappear.
• The corrugation is the spacer — one component, three functions — In a zero-gap alkaline cell, you need: a current collector, a gas-liquid separator, and a spacer to maintain the electrode-membrane gap. Corrugated mesh does all three in one piece. The mesh material carries the current. The corrugation channels separate gas from liquid. The peak height sets the gap. Fewer components means fewer assembly steps and fewer failure modes.
• Formed from our own nickel mesh — not two different suppliers — The flat mesh substrate is woven or expanded in-house from our own nickel wire or sheet. The corrugation is formed in-house on a precision gear-former. The annealing is done in-house. You are not buying mesh from one company and having it corrugated by another — with each blaming the other if the finished component fails your cell test.
• Corrugation pitch and height held to your tolerance — Our gear-forming process uses precision-ground forming rolls with tooth profiles cut to your specified pitch and amplitude. Pitch tolerance ±0.1 mm; height tolerance ±0.05 mm. These are not generic corrugating rolls — they are cut for your flow field design.
• Anneal after forming — stress-free, dimensionally stable — Corrugating mesh work-hardens the nickel at every bend. Without post-form annealing, the mesh springs back under stack compression and the channel height changes. We solution anneal after forming — the corrugation profile is locked in, and the mesh sits at your specified height under compression, cycle after cycle.
• Flat contact zones at peaks and valleys — good electrical contact — Our trapezoidal profile option provides flat contact surfaces at both the peak (contacting the adjacent layer above) and the valley (contacting the layer below). This maximizes electrical contact area compared to a sinusoidal wave where contact is theoretically a line. More contact area = lower interfacial resistance = lower cell voltage.

Most companies that offer corrugated mesh do not make the mesh. They buy flat mesh, run it through a corrugating machine, and ship it. The nickel wire chemistry, the weave integrity, the annealing condition — none of it is under their control. When your cell performance varies from batch to batch and you trace the root cause to the mesh, you discover that the mesh supplier changed their wire source without telling anyone, and the new wire has 0.2% more iron than the qualification batch.

At DLX, the chain is linear and transparent. Our melting furnace produces pure nickel ingot to your specified grade. Our rolling mill or drawing line produces the strip or wire that becomes your flat mesh substrate. Our weaving loom or expanding press makes the flat mesh. Our gear-former corrugates it to your pitch and amplitude specifications. And our controlled-atmosphere furnace anneals the finished corrugated mesh to lock in the profile geometry and relieve forming stresses. Five steps, one facility, one quality system, one point of accountability.

• 12,000 m² integrated facility — melting, wire drawing, strip rolling, weaving, expanding, corrugating, annealing, inspection. The entire process chain under one roof.
• Corrugation capability: pitch 2.0–8.0 mm, amplitude 0.5–3.0 mm, profile sinusoidal or trapezoidal. Substrate: woven (all patterns) or expanded metal.
• ISO9001 with full melt-to-mesh traceability; SGS-accredited; BV and TÜV inspection available. Drawing-controlled manufacturing with first article inspection.

Source: DLX Alloy product catalog. Chemistry certified from ingot through finished corrugated mesh.

Third-party inspection by SGS, BV, or TÜV available. Free sample of 5 sheets for electrolyzer OEM drawing evaluation.

• How do I select the right pitch and amplitude for my cell?

  Start with your target current density and gas production rate per cell. Higher current density requires more gas removal capacity — increase amplitude or decrease pitch to add channel cross-sectional area. Your flow modeling (CFD) should guide the initial parameters. If you do not have a CFD model, we can provide sample sheets at 2–3 pitch/amplitude combinations for empirical single-cell testing. Most customers converge on their optimal geometry within two iterations.

• Can the corrugation be oriented at an angle to the sheet edges?

  Standard is channels parallel to the sheet length — this aligns with the natural flow direction from inlet to outlet in most cell designs. If your design requires channels at an angle (e.g., 45° for cross-flow), sheets are cut after corrugation at the specified angle. The cut edges will intersect the corrugation channels at an angle — some open channel ends will be exposed. We can discuss whether this is acceptable for your design or whether the forming roll orientation should be adjusted.

• What is the thinnest corrugated mesh you can produce?

  Total thickness (substrate thickness + corrugation amplitude): minimum approximately 0.7 mm for woven substrate with 0.10 mm wire and 0.5 mm amplitude. The practical minimum is driven by the substrate wire diameter — the wire must survive the bending at the corrugation peaks without fracturing. For expanded metal substrate, minimum total thickness is approximately 0.9 mm with 0.15 mm sheet and 0.6 mm amplitude.

• Does the corrugation process damage the mesh surface?

  No — our forming rolls are polished to prevent surface marking on the nickel. The mesh bends around a controlled radius at each peak and valley. Post-form annealing relieves any surface stresses from bending. The surface condition of the finished corrugated mesh is equivalent to the surface condition of the flat substrate — if the substrate was bright annealed, the corrugated mesh is bright annealed.

• Can you produce corrugated expanded mesh the same as corrugated woven mesh?

  Yes. Expanded nickel mesh can be corrugated with the same forming process. The key difference is that expanded mesh has directionality — the diamond pattern has a long-way and short-way orientation. The corrugation channels should be aligned with the LWD direction for maximum mechanical integrity through the forming rolls. We will confirm the optimal orientation during drawing review.