What is Zinc Phosphating?
Zinc Phosphating is paramount for products which require maximum resistance to corrosion combined with excellent paint adhesion. Zinc coatings absorb oil, which inhibits any scuffing of metal parts which may occur during manufacture or assembly.
Depending on the intended purpose of the finish, the crystal size, shape, coating-weight and colour can be modified to meet many industrial military specifications.
Lightweight zinc phosphate coatings are generally used as a pre-treatment to provide an adhesive surface for paint and can be achieved through spray coatings or immersion. The light coating (typically between 0.3 and 1 micron in diameter) also provides a maximum resistance to corrosion.
Medium-weight zinc phosphate coatings are normally used as a lubricant carrier for less demanding cold-forming procedures; like tube drawing or sheet reduction.
Heavy-weight zinc coatings possess a much more defined crystalline structure which can be up to 200 microns in diameter. The thicker coating is best for products that demand additional rust preventative compounds, heavy duty lubricants or soaps.
Benefits of Zinc Phosphating:
- Zinc Phosphate plating is lead free
- Corrosion Resistance
- Electrically Conductive
Applications of Zinc Phosphate
- Oil and Gas Industry Components (often used as a primer for components)
- Non Reflective Finish for Equipment
- An Excellent Base for Organic Coatings
- Retains lubricant on the surface of plated parts
Our list of approved specifications:
- Def Stan 03-11 Class II
However, if your product requires plating to a specification different to those listed above; please don’t hesitate to contact us in order to discuss your requirement. As Metal Finishing experts we would be keen to have the opportunity to provide some advice and maybe offer a solution.