Coated aluminum sheets are widely used in construction, transportation, aerospace, and packaging industries due to their lightweight structure, corrosion resistance, and design flexibility. However, the true performance and service life of coated aluminum sheets depend not only on the coating material itself but also on the surface treatment techniques applied before and during coating.
Effective surface treatment enhances coating adhesion, improves corrosion resistance, and ensures consistent appearance under demanding environmental conditions. This article explores the most common and advanced surface treatment methods for coated aluminum sheets and explains how they contribute to durability and long-term performance.
Coated Aluminum Sheet Surface Treatment Techniques
1. Common Surface Treatment Techniques for Coated Aluminum Sheets
To achieve stable coating quality, coated aluminum sheets typically undergo several surface preparation and treatment processes. The most widely adopted methods include:
Chemical Conversion Coating
Chemical conversion coatings, such as chromate conversion or anodizing, create a protective oxide layer on the aluminum surface. This layer significantly improves corrosion resistance while providing an ideal base for subsequent coatings. As a result, coating adhesion and long-term stability are greatly enhanced.
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