Titanium bipolar plates for PEM water electrolysis.YIANTENG manufactures Grade 1 titanium bipolar plates with precision-etched flow fields and application-matched platinum coatings. Flow-field formation, dimensional inspection, surface activation and coating are coordinated within one manufacturing route—supporting faster drawing revisions, consistent plate geometry and a conductive, corrosion-resistant interface for PEM electrolyzer stacks. |  |
Grade 1 Ti Titanium substrate | ±50 μm Etching precision | Pt Platinum coating | 50–500 nm Coating thickness range |
PEM electrolysis for responsive hydrogen production | PEM electrolyzers combine compact stack architecture, rapid load response and high-purity hydrogen output. They are used for renewable-power balancing, distributed hydrogen supply and industrial applications that require controllable on-site production. |
Water releases oxygen Purified water enters the anode. Electrical energy drives oxygen evolution and releases protons and electrons. 2H₂O → O₂ + 4H⁺ + 4e⁻ | Protons cross the membrane Only H⁺ passes through the PEM. Electrons reach the cathode through the external electrical circuit. H⁺ → e⁻ → external circuit | Hydrogen is formed Protons and electrons recombine at the cathode, producing hydrogen for collection. 4H⁺ + 4e⁻ → 2H₂ |
The role of the bipolar plate in a PEM electrolyzer
Bipolar plate · flow field Anode PTL + catalyst layer PEM membrane Cathode catalyst layer + PTL Bipolar plate · flow field Simplified PEM cell stack | Current and electrical contactFlat lands and a conductive coated surface distribute current across the active area and maintain repeatable contact between cells. Water and gas distributionEtched serpentine, parallel or interdigitated channels feed water and remove oxygen and hydrogen according to the stack design. Heat, compression and sealingPlate geometry and consistent sealing lands support heat transfer, gasket interfaces and stack compression. |
From flow-field drawing to coated plate
YIANTENG connects flow-field manufacture and platinum surface engineering in one technical route. Drawing revision, dimensional inspection, surface preparation and coated-area requirements remain tied to the same finished component.
Drawing review
Flow field, ports, sealing lands and coated boundaries.
Precision etching
Die-free formation of the specified channel geometry.
Dimensional inspection
Channels, flatness, ports and critical interfaces.
Cleaning & activation
Preparation of the etched channels and contact lands.
Platinum coating
Controlled coated area and specified thickness.
Final verification
Dimensions, appearance and coating records.
YIANTENG etched and platinum-coated bipolar plates
YIANTENG combines die-free chemical etching with in-house platinum coating. The flow field is formed without stamping pressure or CNC tool paths, then the finished titanium geometry is cleaned, activated and coated under one project route.
Flow-field manufacturing comparison
| Engineering factor | YIANTENG chemical etching | Stamping | Full CNC machining |
|---|---|---|---|
| Tooling and revision | Die-free; revise artwork to change channels | Hard tooling; changes may require tool rework | No die; revise the program and toolpath |
| Thin-titanium channel formation | No forming or cutting load | Springback and die-controlled geometry | Cutting load during material removal |
| Edge and surface condition | No stamping burrs or CNC tool marks | Burr and springback control required | Tool marks and deburring require control |
| Prototype-to-batch route | One etching route from samples to batches | Efficient at volume after tooling validation | Flexible for prototypes; slower as area grows |
 | YIANTENG platinum-coating capabilityUniformity across channels and landsDeposition parameters and coated boundaries are controlled around the complete active plate geometry. Adhesion through coordinated preparationCleaning and surface activation are matched to the etched titanium before platinum deposition. Thickness controlAvailable thickness range: 50–500 nm, with a stated thickness tolerance of ±10%. Appearance and final inspectionCoated area, visual finish and project-defined records are checked before release. |
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