Roll bond evaporator: surface treated with powder painting to prevent the corrosion.

Residual moisture: ≤5mg/100cm3

Residual impurity: ≤1mg/100cm3

Residual mineral oil: ≤100mg/100cm3

Residual chlorine: ≤5vloppm

Residual paraffin: ≤3mg/m2

Biggest single impurity: ≤0.5mm

Coating thickness: 40~90μm

Hardness of coating: ≥2H

Impact of coating: 50cm.kg/cm

Adhesion of coating: ≥2 grade

Flexibility of coating: around R=3D bend 180°

Color tolerance of powder painting: ΔE≤1.5