SURFACE FINISHING
Electro-less Nickel Plating
Coating of Nickel on the surface provides a shiny appearance, excellent hardness, abrasive, wear, and corrosion-resistance to the substrate material.
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Introduction
Electro-less Nickel plating is a popular chemical plating process from a solution containing Nickel on the surface of various metals such as aluminum, Steel, copper, tungsten, polymer, and many more.
Coating of Nickel on the surface provides a shiny appearance, excellent hardness, abrasive, wear, and corrosion-resistance to the substrate material. The electro-less nickel plating substrate must be machined with roughness not more than Ra 1.6µm. This approach will reduce the Machining marks but might still be visible. This method allows plating thicknesses of up to 5 microns while maintaining an acceptable tolerance for the parts.
key properties
| Features | Info |
|---|---|
| Materials | Aluminum, Steel, Stainless Steel |
| Color | n/a |
| Texture | Smooth, glossy finish |
| Thickness | 5μm to 8μm |
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Specify alloy type, thickness and test method for the finished surface
Electroless nickel requirements should identify the substrate, alloy/coating type, coverage, thickness target or range, post-treatment if required, masked interfaces and the test or measurement method used for acceptance.
Engineering data to lock before release
| Substrate and prep | Base material and required pre-plate condition |
|---|---|
| Coating data | Nickel-phosphorus type, thickness and uniformity need |
| Functional surfaces | Wear, corrosion, hardness or dimensional interfaces |
| Verification | Thickness method, adhesion/corrosion test and record |
ISO 4527 is a specification and test-method reference; part drawings still need the exact coating class and acceptance criteria.
