Cold Spray Zinc Paint for Steel Structure Pipeline Anti-corrosion and Anti-rust Coating Engineering Paint

Product Features: Long-lasting: Dry film content ≥96%, salt spray resistance ≥3000 hours, the coating system has a corrosion protection cycle of over 25 years, with similar products abroad having successful examples of over 50 years; Environmental friendliness: Contains no heavy metals such as lead or chromium, and no organic solvents such as toluene, xylene, methylene chloride, or methyl ethyl ketone.

Anti-slip: Anti-slip coefficient ≥0.55, can be used for corrosion protection on high-strength bolt connection surfaces;  

Design Purpose: Cold galvanizing paint provides dual functions of cathodic protection and barrier protection.

Barrier protection: When zinc-rich cold spray zinc coating is oxidized, it forms a layer of zinc salts on the surface to provide barrier protection. Meanwhile, the binder in the cold spray zinc coating also offers an additional barrier layer, slowing down zinc oxidation. Therefore, the corrosion resistance of cold spray zinc coatings is superior to that of sprayed zinc (aluminum), hot-dip galvanizing, and other zinc-rich coatings.

Active cathodic protection:

Cold galvanizing paint differs from ordinary coatings, as its dry film contains over 96% pure zinc, providing excellent cathodic protection for steel.

Even in harsh environments, it offers long-term protection for steel surfaces. Its corrosion resistance is comparable to hot-dip galvanizing,

or even superior.

1. Used for long-term corrosion protection of steel, replacing hot-dip galvanizing and thermal spray zinc, achieving better protection than hot-dip galvanizing and thermal spray zinc.

2. Can be applied as a single layer for metal corrosion protection or as a primer in heavy-duty corrosion protection coating systems for extended protection periods.

3. Also used for repairing damage caused by welding, cutting, drilling, or riveting on various galvanized layers of steel structures.

4. Widely applicable to various steel components and facilities, such as power transmission and distribution systems, power generation systems, bridges, building steel structures, concrete mixing plant steel

structures, towers, tunnel facilities, containers, ships, port facilities, hydraulic gates and their附属 steel structures, reinforcement bars, vehicle bodies, pipelines,

tanks, silos, signs, fences, heating facilities, roof steel structures, etc.

Compatible Products: Cold galvanizing paint can be used with epoxy mica iron intermediate paint and then coated with various topcoats;

Recommended topcoat compatible coatings: epoxy resin paint, acrylic polyurethane paint, polysiloxane topcoat, fluorocarbon paint.

Construction Process: Shot blasting for rust removal → drying with compressed air to remove dust → pre-coating special areas like welds with zinc-rich coating → spray (brush) application of zinc-rich coating → coating interval → spray (brush) application of compatible coatings for zinc-rich coating → product quality inspection → qualified

Surface Treatment: The surface should be sandblasted or shot blasted to achieve GB8923 "Rust Grades and Preparation Grades of Steel Surfaces Before Coating" Sa2.5 level. For areas where pretreatment does not meet requirements, use electric grinders to achieve St3 level.

Application Methods:

Pre-coating: Use a brush to apply one coat on welds, corners, edges, screw holes, plate edges, and hard-to-reach areas for pre-coating. Air spray: Connect air source to an oil-water separator, use a 2.5mm nozzle for air spray, maintain a distance of about 25cm between the gun and the object surface, spray width approximately 15cm, apply two passes, wait 1 hour before applying the second coat with two passes to achieve the required thickness, using a cross-hatch pattern for both coats. Airless spray: Use specialized spraying equipment for zinc-rich coatings, with a Z-type nozzle, ensure the entire equipment is clean, recommended compression ratio around 1:30, spray width about 25cm.

Brush application: Use high-quality brushes that do not shed fibers, apply evenly using a cross-hatch method to ensure good penetration of the coating, avoid sagging and unevenness.

Construction Guidance:

Note: Theoretical usage is calculated based on parameters; actual usage may vary significantly depending on the user's application method, the shape of the sprayed workpiece, surface treatment process, film thickness, etc.

Coating Interval: Coating interval: 1 hour for recoating with the same product, 2-8 hours for other coatings. Avoid moisture before the coating is fully dry. High-zinc coatings can form zinc salts (also known as white rust) on the surface; they should not be exposed for extended periods before applying the next coat. If zinc salts have formed, perform secondary removal treatment on the affected surface.

Application Conditions: Environmental conditions: 0°C to 50°C, relative humidity during application less than 85%, no dust in the air.

Preparation: Stir the contents of the bucket thoroughly from the bottom to ensure uniformity before use.

Packaging Specification: 25KG/drum

Shelf Life: 12 months