डब्ल्यूएस वाटर सिलिकेट – निर्माण गाइड
1. लगाने से पहले की तैयारी
1सब्सट्रेट की जाँच और तैयारी
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%.
2कोटिंग की तैयारी
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).
3पारिस्थितिकी स्थितियों की पुष्टि
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. एप्लिकेशन प्रक्रिया
| लगाने की विधि | Parameter | उपयोग परिदृश्य |
|---|---|---|
| एयरलेस स्प्रे | Nozzle 0.38-0.53mm, pressure 15-25MPa | बड़ी स्टील संरचनाएँ, भंडारण टैंक, पोत |
| वायु स्प्रे | Nozzle 1.5-2.0mm, pressure 0.3-0.5MPa | छोटे/मध्यम कार्यखंड, उपकरण आवास |
| ब्रश / रोलर लेपन | — | छोटे क्षेत्र की मरम्मत, वेल्ड की स्ट्राइप-कोटिंग, किनारों का सुदृढ़ीकरण |
अनुशंसित शुष्क फ़िल्म मोटाई (DFT):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. अनुप्रयोग सावधानियाँ
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उपयोगनिम्न ताप कीवरिंग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. सुरक्षा और पर्यावरण
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. गुणवत्ता निरीक्षण
| निरीक्षण आइटम | विधि | स्वीकृति मानदंड |
|---|---|---|
| सतह तैयारी | ISO 8503 Surface Roughness Comparator | Sa2.5, Rz 40-75μm |
| शुष्क फिल्म मोटाई (DFT) | ISO 2808 विद्युत चुंबकीय प्रेरण विधि | 80% मापन बिंदु ≥ निर्धारित मान, कोई मापन बिंदु नहीं<80%规定值 |
| आसंजन | ISO 4624 पुल-ऑफ विधि / ISO 2409 क्रॉस-कट विधि | ≥≥3-5 MPa |
| पिनहोल/कोटिंग-असंततता | उच्च-वोल्टेज स्पार्क जाँच | पिनहोल या कोटिंग असंततता न हों |
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