Indigo Zinc Chromate Primer – Gold Series (Anti-Corrosive)

Indigo Zinc Chromate Primer (Yellow Metal Primer): Superior Anti-Corrosion Defense

For long-lasting protection of metal surfaces against rust and corrosion, Indigo Zinc Chromate Primer (Yellow Metal Primer) is the trusted industrial standard. This solvent-based anti-corrosive primer is formulated with zinc chromate pigments, which act as a powerful sacrificial barrier, preventing rust from forming and spreading. It is the essential first coat for gates, grills, industrial machinery, and structural steel before applying enamel topcoats.

Applied directly to prepared steel, this yellow metal primer ensures superior adhesion and chemical resistance, guaranteeing that your final paint finish looks smooth and remains intact for years, even in highly corrosive or coastal environments.

Why Choose Indigo Zinc Chromate Primer?

Zinc Chromate is chosen for its aggressive anti-corrosive properties:

• Sacrificial Protection: The zinc chromate pigment actively inhibits rust formation by corroding before the underlying steel does (cathodic protection).
• Excellent Adhesion: Bonds tenaciously to ferrous metals, aluminum, and galvanized surfaces where standard primers fail.
• Chemical Resistance: Forms a tough barrier against moisture, salt spray, and mild industrial fumes.
• Ideal Base: Provides the perfect, non-porous foundation for subsequent layers of alkyd-based enamel paint like Indigo Gloss or Tractor Enamel.

Key Features of Indigo Zinc Chromate Primer (Yellow Metal Primer)

• Type: Anti-Corrosive Alkyd Based (Solvent).
• Usage: Ferrous and Non-Ferrous metal surfaces.
• Colour: Distinctive Yellow/Mustard.
• Thinner: General Purpose Thinner (MTO).

Recommended Application Areas

This metal primer is essential for:

• Iron Gates & Railings: Protecting exposed outdoor metalwork.
• Structural Steel: Beams, trusses, and industrial machinery.
• Pipes & Tanks: Protecting metal surfaces in contact with water or high humidity.
• Automotive Chassis: Used as a protective base for vehicle underbodies.

Technical Specifications: Indigo Zinc Chromate Primer (Yellow Metal Primer)

How to Apply Indigo Zinc Chromate Primer

Proper surface preparation is crucial for rust prevention:

1. Surface Prep (CRITICAL): Remove all rust, mill scale, loose paint, and grease. Use a wire brush or sandpaper (80–120 grit) to clean the surface completely. Wipe with thinner to degrease.
2. Mixing: Stir the primer well. Dilute with MTO Thinner according to the application method (10–25%).
3. Application: Apply one coat using a brush or spray gun. Ensure full coverage, especially on welds and edges.
4. Drying: Allow 6–8 hours for drying. Do not apply putty until the primer is fully dry.
5. Finishing: If imperfections exist, apply Knifing Paste Filler, sand, and then apply a second spot coat of primer before proceeding with 2 coats of your chosen enamel topcoat. Find expert tips on anti-corrosive priming here.

Frequently Asked Questions (FAQ)

Q: Can I use this primer on wood?
A: No, this primer is formulated exclusively for metal. For wood, use Wood Primer.

Q: Why is it yellow?
A: The yellow color comes from the zinc chromate pigment, which is the active anti-rusting agent. This allows painters to easily verify that the protective coat has been applied.

Q: Can I leave the metal surface with just the primer?
A: No. While it offers excellent rust resistance, the primer must be protected by two coats of a durable topcoat enamel to protect the zinc pigments from weathering and abrasion, ensuring long-term rust prevention.