ZINC PHOSPHATE COATING

Zinc phosphate coating is a chemical conversion coating process based on the formation of phosphate crystals on the surface as a result of the reaction between the metal to be coated and phosphoric acid in a zinc phosphate solution under specific temperature and concentration conditions. This crystalline structure provides a homogeneous and controlled coating layer on the surface.

It is widely used in pre-paint applications to prepare the surface and improve the adhesion of coating systems to the metal surface. Additionally, its porous structure allows protective oils to be retained on the surface, contributing to corrosion resistance.

Zinc phosphate coating is a functional surface treatment method that can be used both as a pre-treatment for painting and as a protective primary coating. Products to be coated with zinc phosphate can be processed under controlled conditions in our fully automatic zinc phosphate facility (capacity: 10 tons/day).

ZINC PHOSPHATE COATING TECHNICAL SPECIFICATIONS

  • Coating type: Zinc phosphate
  • Coating structure: Crystalline conversion layer
  • Surface property: Microcrystalline / porous
  • Application purpose: Paint adhesion, oil retention, corrosion resistance
  • Application method: Fully automatic process line
  • Capacity: 10 tons / day

ZINC PHOSPHATE COATING ADVANTAGES

Zinc phosphate coating enhances the adhesion of paint and organic coatings to the metal surface through the crystalline layer formed on the surface. This provides a significant advantage, especially in pre-paint coating systems, in terms of long-term performance.

In addition, the porous structure of the phosphate layer helps retain protective oils on the surface, supporting corrosion resistance. Therefore, zinc phosphate coating is an effective surface treatment method used both as a protective base coating and as a preparation step for subsequent processes.

ZINC PHOSPHATE COATING APPLICATION AREAS

  • Metal surface preparation before painting
  • Automotive parts
  • Fasteners
  • Machinery and equipment components
  • Industrial parts operating with protective oil

ZINC PHOSPHATE COATING PROCESS AND SURFACE STRUCTURE

During the zinc phosphate process, a controlled chemical reaction occurs between the metal surface and the phosphate solution, forming a crystalline phosphate layer on the surface. This layer prepares the surface for subsequent processes and plays a critical role in paint adhesion and surface protection.

Depending on the application parameters, the crystal structure can directly affect surface performance. Therefore, control of process temperature, time, and chemical concentration is critical to achieving high-quality results.

WHY ERKAP?

  • Fully automatic zinc phosphate coating line
  • High-volume production capability
  • Controlled chemical process management
  • Surface quality suitable for pre-paint applications
  • Customer-specific production support

Zinc phosphate coating is an important surface treatment process used to improve paint adhesion, retain protective oils on the surface, and enhance metal surface performance. As a widely used method among phosphate coating systems, it provides long-lasting surface preparation in automotive and industrial applications.