1 min readContamination stays under the coating
Oil, scale, corrosion or process residues can create a weak point between the metal and the coating. Paint does not remove them; it only covers them.
The part must be designed for the process
Closed cavities need vents, pockets need drainage and the hanger must keep the part in the right position. These details affect both cleaning and coating.
Process options
Henkel chemical pretreatment
Our powder line uses iron phosphating. Our KTL line uses zinc phosphating, either on its own before powder or wet coating, or as part of the full KTL process.
- Iron phosphatingStandard preparation for powder coating.
- Zinc phosphatingUsed before powder or wet coating, or as part of KTL.
- Aluminium and zinc-coated partsA separate pretreatment programme on the KTL line.
- Part reviewSurface condition, racking, electrical contact, venting, drainage and masking.