T/COS 010-2022 Specification for Water-Based Nano Coatings for Projectiles and Arrows

Scope

Scope: This document specifies the requirements, quality assurance, testing methods, marking, packaging, transportation, and storage of water-based nano coatings for missiles and projectiles. This document applies to water-based nano coatings for missiles and projectiles; Main technical content: 3.1 Terms and definitions The following terms and definitions apply to this document. 3.2 Coating system A composite coating formed by a primer and topcoat. 4 Requirements The performance indicators of water-based nano anti-corrosion primers, water-based nano protective topcoats, and coating systems for missiles and projectiles shall comply with the provisions of Tables 1, 2, and 3. Table 1: Performance requirements for water-based nano anti-corrosion primers for missiles and projectiles Serial number Item Indicator 1 State in the container After stirring, it should be uniform. 2 Non-volatile content, % ≥45 3 Fineness, μm ≤30 4 Viscosity, KU 80–100 5 Density, g/cm3 ≤2.06 6 Volatile organic compound (VOC) content, g/L ≤25 7 Storage stability (50±2)℃, 7d) Minimal slight stratification allowed. After stirring, there should be no hard lumps and it should be uniform. 8 Freeze-thaw stability (–10℃±3℃, 16h; 18℃–30℃, 8h; 5 cycles) Minimal slight stratification allowed. After stirring, it should be uniform. The shelf life, drying time, flexibility, adhesion, and impact resistance shall still meet the requirements of this document. 9 Shelf life, h ≥3 10 Film appearance Smooth and uniform surface color, meeting color requirements. 11 Drying time Drying time, h ≤2 Final drying time, h ≤24 Drying at 60℃±2℃, h ≤2 Drying at 80℃±2℃, h ≤1 12 Flexibility, mm ≥11 13 Impact resistance, cm ≥50 14 Scratch test, grade ≤1 15 Pencil hardness ≥H 16 Resistance to epoxy nitrocellulose paint (23℃±2℃, 18h) No peeling 17 Resistance to polyurethane

Development Information

Related Standards