Direct answer: Zhengna Technology manufactures Dacromet plated springs for applications that need corrosion resistance plus stable spring force. Buyers should review coating thickness, salt spray targets, load points, and post-coating dimensions together.

| Buyer check | Why it matters |
|---|---|
| Material and wire diameter | Controls load, fatigue life, corrosion resistance, and forming stability. |
| Load points and working range | Confirms the spring performs in the real installed condition. |
| Heat treatment or stress relief | Stabilizes force, dimensions, and fatigue behavior after forming. |
| Surface treatment | Matches corrosion, appearance, and assembly environment requirements. |
| Inspection and packaging | Protects traceability, load consistency, and deformation-free shipment. |
Dacromet plating can improve corrosion resistance when coating thickness, adhesion, and spring performance are controlled.
Yes. Coating can affect dimensions, friction, and fit, so load and dimensional checks should be performed after coating.
Define material, load points, coating requirement, salt spray target, working environment, and packaging needs.