OKS 2551 – Zinc Protection, Spray

Long-term corrosion protection for all ferrous metals based on high-purity zinc powder with active cathodic corrosion protection.

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New product! Replaces OKS 2511

Areas of application

For touching up damaged spots on galvanised surfaces, e.g. after welding, drilling or cutting
For touching up damaged spots on hot-dip galvanised surfaces as per EN ISO 1461:2022-12 with the required layer thickness of 100 µm
For priming ferrous metals when they cannot be galvanised, e.g. for vehicle and boat repair; for steel building construction, civil engineering and bridge building; for tank and overhead line construction; on gratings, fence and traffic light posts, exhaust systems, gutters and similar.

Advantages and benefits

Highly effective, active cathodic corrosion protection for exceptionally long-lasting protection
Self-healing polymer layer which closes again after slight damage and prevents corrosion
Wide field of application as enduring corrosion protection on ferrous metals, including at high temperatures and in aggressive atmospheres
Suitable for touching up hot-dip galvanised surfaces as per EN ISO 1461:2022-12
Suitable for corrosion protection up to Category C5H as per EN ISO 12944:2018-06 for industrial areas with high humidity and an aggressive atmosphere and for coastal atmospheres with elevated salt levels
First coat in combination with subsequent paint coat with products such as OKS 2571 or OKS 2581
No impact on quality during spot welding due to effective electrical conductivity

Technical specifications

lower operating temperature: -70 °C
upper operating temperature: 250 °C
salt spray test: >2.000 h / >6,000 h (layer thickness >70 µm Air-drying / layer thickness >100 µm heat-curing (150°C/min))
optimal layer thickness: 60-80 µm (DIN 50 982-2)

Applications

Clean the surfaces for optimum adhesion. It is best to clean mechanically first and then with OKS 2610 or OKS 2611 universal cleaner. The surface to be treated must be dry, uncoated and free of grease. Shake the can before use until you can hear the stirring balls rattle and continue shaking vigorously for 2 more minutes. Spray evenly onto the prepared surface from a distance of 20 - 30 cm using 1 - 2 cross coats or circular movements. Avoid local excesses. For thicker layers, apply another coat after the solvent has evaporated. After spraying, turn the can upside down and spray the valve in this position until only solvent comes out. Drying and curing times as per following technical data.