A Case Study of the Renovation of a Colorful Steel Roof

Before and after renovation comparison

 

Construction process

1. Clean the surface. Wash from the top of the shed to the bottom, following the water flow direction, to remove dust, oil stains, loose rust, old coating debris, and other contaminants.

2. Apply rust-preventive primer to enhance adhesion.

3. Apply epoxy primer. Ensure the coating is continuous, free of pinholes and missed areas, with corners appropriately thickened.

4. Apply acrylic topcoat. Maintain a steady spray gun speed to prevent sagging or orange peel effects.

 

Step 1: Surface treatment

Polish and clean off dust, oil, and rust

 

Step 2: Spray rusted primer

Brush strokes: 1

Dry film thickness: 25 μm

Proportion: No curing agent and diluent

Instructions: Apply directly, allow to dry for 24 hours, then repair rusted or leaking areas.

 

Step 3: Apply blue epoxy zinc-rich anti-rust primer

Brush strokes: 1

The dry film thickness was (100-140) μm.

The ratio of paint, curing agent and diluent was 4:1:0.8.

Note: The lacquer hardener should be used within 3 hours after application and left to dry for 24 hours.

 

Step 4: Spray blue acrylic polyurethane topcoat

Brush strokes: 1

The dry film thickness was (80-120) μm.

The ratio of paint, curing agent and diluent is 5:1:0.5.

Note: The lacquer hardener must be used within 3 hours after application.

#Anti-rust primer# #Intermediate anti-corrosion coating#