Guide de construction du silicate d'eau Ws
1. Préparation avant application
1Inspection et préparation du support
Check substrate surface cleanliness, roughness, temperature and humidity conditions. Steel blast-cleaned to Sa2.5 grade (ISO 8501-1), surface roughness Rz 40-75μm. Complete primer application within 4h after treatment. Substrate temperature ≥ dew point +3°C, relative humidity ≤85%.
2Préparation du revêtement
Accurately weigh the main agent and curing agent according to the ratio for one-component or two-component (as per product label). Stir with an electric stirrer at low speed (300-500rpm) for 3-5 minutes until uniform. Add 0-10% dedicated thinner as needed to adjust application viscosity. Use after an induction period of 15-30 minutes (23°C).
3Vérification des conditions ambiantes
Application temperature: 5-40°C (substrate temperature ≥ dew point +3°C). Relative humidity: ≤85%. The application area should be well ventilated. For outdoor application, avoid rain, snow, strong wind, and direct sunlight.
2. Procédé d'application
| méthode d’application | Parameters | Scénarios d'application |
|---|---|---|
| Pulverisation sans air (airless) | Nozzle 0.38-0.53mm, pressure 15-25MPa | Grandes structures en acier, réservoirs de stockage, navires |
| Pulvérisation à l'air comprimé | Nozzle 1.5-2.0mm, pressure 0.3-0.5MPa | Pièces de petite/moyenne dimension, carters d’équipement |
| Application au pinceau / au rouleau | — | Réparations ponctuelles, pré-encrage des soudures, renforcement des angles |
Épaisseur sèche de film recommandée (ESF) :30-60μm/coat. Multiple coats may be required to achieve specified film thickness. Minimum recoat interval must be met between coats (see TDS Drying Time table).
III. Précautions d’application
1. If maximum recoat interval is exceeded, sweep blast the surface (low pressure 0.2-0.3MPa, non-metallic abrasive) to create mechanical anchoring profile.
2. Welds, free edges, bolt holes, etc. should be stripe coated first to ensure coating thickness at these weak points meets specifications.
3. Continuously stir the coating during application to prevent pigment settling (especially for products containing heavy pigments such as zinc powder/mica iron oxide/glass flakes).
4. Two-component coatings must not be used after exceeding the pot life (4-8 hours @23°C)—cross-linking reaction has occurred, and continued use will result in loss of adhesion and coating chalking.
5. Low temperature (<5°C)Application时Curing Agent反应活性显著Reduces，需Utilisationréticulation à basse température剂或采取加热措施。
6. Avoid contact with water during coating curing after application (epoxy resin is not water-resistant; amine curing agents react with water to produce amine blush/white spots).
IV. Sécurité et environnement
1. Applicator must wear protective equipment: gas mask (A2P2 filter cartridge), goggles, nitrile gloves, anti-static workwear.
2. Open flames, welding, cutting, and other operations that generate sparks/high temperatures are prohibited in the construction area. Use explosion-proof electrical equipment.
3. Dispose of waste paint and containers in accordance with Category HW12 of the National Hazardous Waste List.
4. Residual paint must not be poured into sewers or soil. Collect and hand over to a qualified hazardous waste disposal unit for treatment.
V. Contrôle qualité
| Points de contrôle | méthode | Critères d'acceptation |
|---|---|---|
| Préparation de surface | ISO 8503 Surface Roughness Comparator | Sa2.5, Rz 40-75μm |
| Épaisseur du film sec (DFS) | ISO 2808 Méthode par induction électromagnétique | 80 % des points mesurés ≥ valeur spécifiée, aucun point mesuré<80%规定值 |
| Adhérence | ISO 4624 Essai de traction / ISO 2409 Essai au quadrillage | ≥≥3-5 MPa |
| Piqûres/discontinuités | Contrôle aux étincelles à haute tension | Absence de piqûres et de discontinuités (holidays) |
⬇ Download this document (PDF)
Articles et actualités associés
Pour approfondir : articles techniques et actualités du secteur par Kexin New Materials