Silicato d'acqua WS – Guida alla costruzione
1. Preparazione prima dell'applicazione
1Ispezione e trattamento del supporto
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%.
2Preparazione del rivestimento
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).
3Verifica delle condizioni ambientali
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. Metodo applicativo
| Metodo di applicazione | Parameters | Scenari applicativi |
|---|---|---|
| Verniciatura airless | Nozzle 0.38-0.53mm, pressure 15-25MPa | Grandi strutture in acciaio, serbatoi di stoccaggio, navi |
| Verniciatura a spruzzo d'aria | Nozzle 1.5-2.0mm, pressure 0.3-0.5MPa | Pezzi di piccole/medie dimensioni, involucri di apparecchiature |
| Applicazione a pennello / rullo | — | Riparazioni su piccole aree, pre-verniciatura delle saldature, rinforzo dei bordi |
Spessore del film secco (DFT) consigliato: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. Precauzioni di applicazione
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Usoreticolazione a bassa temperatura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. Sicurezza e ambiente
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. Controllo qualità
| Voci di controllo | Method | Criteri di accettazione |
|---|---|---|
| Preparazione della superficie | ISO 8503 Surface Roughness Comparator | Sa2.5, Rz 40-75μm |
| Spessore del film secco (DFT) | Metodo di induzione elettromagnetica ISO 2808 | 80% dei punti di misura ≥ valore specificato, nessun punto di misura<80%规定值 |
| Adesione | ISO 4624 Metodo di trazione / ISO 2409 Metodo del taglio a griglia | ≥≥3-5 MPa |
| Puntature/discontinuità | Prova a scintilla ad alta tensione | Assenza di puntature e discontinuità del rivestimento |
⬇ Download this document (PDF)
articoli e notizie correlati
Approfondimenti: articoli tecnici e notizie di settore di Kexin New Materials