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R134a Cooling System Tube Inside standards | Specilication of coating |
Residual moisture ≤5mg/100cm3 Residual impurity ≤10mg/100cm3 Residual mineral oil ≤100mg/100cm3 Residual chlorine ≤5vloppm Residual paraffin ≤3mg/m2 Biggest single impurity ≤0.5mm | Coating thickness 1) thickness of Anodic electrophoresis coating 18~22μm; 2) thickness of cathodic electrophoresis coating 15~20μm; 3) thickness of wire-tube evaporator powder coating: 60~300μm Hardness of coating: ≥2H Impact of coating: 50cm·kg/cm impact, no crack Adhesion of coating: ≥two grade Flexibility of coating: Around R=3D bend 180°, no crack or no fall off Color tolerance of powder painting E≤1.5 Corrosion resistant (Salt spray GB2423) 1) Anodic electrophoresis coating ≥150h; 2) Cathodic electrophoresis coating ≥48h; |