GEPW
Electroplating-led: zinc, zinc-nickel, hard chrome, ENP, silver, selective, nickel, copper, tin and hydrogen embrittlement relief baking where specified. View GEPW website.
Coordinated Surface Systems
Combined surface systems are reviewed as one engineered route, not as a loose process bundle.
Route engineering
Combined systems need sequence, thickness and inspection clarity.
For multi-step systems, the route must consider film build, masking, fitment, functional surfaces and application environment.
| Surface system | Route | When useful | Technical checks |
|---|---|---|---|
| Zinc-Nickel + Xylan / PTFE | GEPW zinc-nickel → BMF Xylan 1070 / PTFE | Corrosion-resistant plated base with functional dry-film topcoat. | Total film build, threads, masking, torque/friction, SST and environment. |
| ENP-PTFE / ENP-Teflon | Electroless nickel composite through GEPW | Uniform deposit behaviour with low-friction or release characteristics. | Base material, phosphorus type, thickness, heat treatment and contact areas. |
| Selective Silver | Masking / jigging → silver on defined zones | Electrical contacts, busbars and conductive surfaces. | Contact zone, undercoat, masking tolerance, thickness and inspection method. |
| Glass Bead + Passivation | BMF glass bead → passivation where suitable | Stainless parts needing refined appearance and passivation support. | Stainless grade, welds, scale, heat tint, dimensional sensitivity and appearance. |
| Shot Blasting + Manganese Phosphate | BMF blasting → manganese phosphating | Ferrous parts requiring surface preparation and oil-retaining phosphate. | Steel grade, rust/scale, media route, coating weight and post-treatment. |
Group capability
Complementary surface-treatment capabilities.
Combined surface-treatment requirements are reviewed with the applicable electroplating, coating, preparation and inspection route in mind.
BMF
Coating-led: zinc flake, Xylan 1070 / PTFE, shot blasting, glass bead, phosphating and passivation.
RFQ clarity
Data required for a useful technical recommendation.
Send the application requirement along with the process name.
Drawing
Material, revision, critical surfaces and dimensions.
Performance
SST, wear, friction, conductivity, torque or release requirement.
Restrictions
Threads, bores, masking zones, no-coat areas and contact points.
Documentation
Standard, report format, inspection method and approval route.