Process directions
Pretreatment affects the adhesion and appearance of subsequent coatings. Our data covers cleaning, activation and zincating steps for steel, copper, zinc die-castings and aluminum alloys; the choice should be determined by the substrate and the subsequent coating type.
| Direction | Use | Key points to confirm |
|---|---|---|
| Chemical & electrolytic degreasing | Removes stamping oil, cutting oil and surface contaminants; immersion, spray or electrolytic treatment can be chosen according to substrate and line configuration. | Confirm substrate, oil type and subsequent rinsing requirements. |
| Activation & etching | Prepares the surface for subsequent plating; acid or alkaline etching for aluminum alloys can be discussed according to workpiece condition. | Focus on alloy composition, dimensional allowance and surface uniformity. |
| Desmutting & zincating for aluminum | Removes etching residues from aluminum parts and provides a transition surface for subsequent plating; our data includes cyanide-free zincating. | First confirm adhesion and appearance with samples. |
Please specify when submitting requirements
Please provide the substrate and alloy condition, existing surface treatment, degree of oil contamination or oxidation, target coating and key dimensions. Pretreatment conditions vary with the substrate; no single formulation is treated as a universal process for all materials.
The above is organized by application from the provided product catalog and data and serves as a selection starting point. Specific formulations, applicable substrates, process windows and inspection requirements should be confirmed with the corresponding technical data and sample verification.