Zinc yellow primer with high film hardness.

Guan Brand Zinc Yellow Primer Manufacturer (Manager Sun: 152·0825·6966) Sales in Sichuan, Chengdu, Yunnan, Chongqing, Guizhou, and other regions; Zinc yellow primer is a type of anti-rust coating specifically designed for non-ferrous metals and special metal substrates, mainly including epoxy zinc yellow primer and epoxy ester zinc yellow primer. It possesses the following core characteristics and technical requirements:
I. Composition and Types
Epoxy Zinc Yellow Primer
Two-component structure: Composed of epoxy resin, zinc yellow pigment, solvent (Component A), and curing agent (Component B), with a mixing ratio typically of 5:1 or 4:1.
Air-dries at room temperature, with a dense and high-hardness film, suitable for difficult-to-adhere substrates such as galvanized steel, stainless steel, and aluminum alloy.
Epoxy Ester Zinc Yellow Primer
Single-component system: Based on epoxy ester resin with zinc yellow as the anti-rust pigment, ready for use without mixing.
Primarily used on aluminum alloy and light metal surfaces; pairing with phosphating primer can enhance salt spray resistance.

II. Core Performance
Excellent Adhesion
Adhesion to smooth surfaces like galvanized sheets and aluminum alloy reaches Cross-Cut Adhesion Level 1, allowing direct spraying without sandblasting.
Outstanding Corrosion Resistance
Saltwater resistance lasts up to 240 hours without rust, with excellent resistance to acids, alkalis, and solvents, making it suitable for harsh environments like marine and chemical industries.
Strong Physical and Mechanical Properties
Good film flexibility: Bend resistance ≤2mm, impact strength ≥40cm.
High-temperature resistance: Can withstand short-term high temperatures up to 200°C.

III. Application Areas
Industrial Anti-Corrosion: Steel structures, oil tanks, underground pipelines, offshore platforms, etc.;
Mechanical Equipment: Automotive parts, port facilities, petrochemical storage tanks;
Special Substrates: Transition primer for light metals like galvanized steel and aluminum-magnesium alloys.

IV. Construction Process
Surface Treatment: Substrates require sandblasting to SA2.5 grade or manual derusting to St3 grade;
Mixing and Preparation: Two-component systems must be mixed in proportion and matured, with a pot life of ≤6 hours;
Environmental Requirements: Temperature ≥10°C, humidity below 80%;
Coating System: Requires pairing with epoxy mica iron intermediate coat and fluorocarbon/polyurethane topcoat to enhance protection.

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