1Substrate inspection and preparation standard
Preparation standard:ISO 8501-1 Sa 2.5 (very thorough blast cleaning)
Roughness requirement:Rz 40-75μm（ISO 8503-1）
Cleanliness requirement:Post-blast surface cleanliness Salt grade 2 (ISO 8502-3), no oil/grease or dust
Application timing:Apply primer within 4 h of blasting to prevent flash rust
Edge and corner treatment:Grind free edges to a rounded radius of R≥2 mm
Weld seam treatment:Remove slag and spatter from welds; stripe-coat the welds
2Paint preparation and mixing
Mixing method:Mix at low speed 300–500 rpm for 3–5 min until homogeneous
Mixing ratio:Weigh precisely according to the mix ratio on the product label
Curing:After mixing, let the blend age for 15–30 min at 23°C before use
Pot life:Pot life 4–8 h at 23°C after mixing; discard beyond this window
3Environmental condition check
Application temperature:5-40°C (substrate temperature at least 3°C above the dew point)
Relative humidity:relative humidity ≤85%
Ventilation requirements:密闭空间强制Ventilation
Weather requirements:Avoid rain / snow / strong wind / direct sun when applying outdoors