Anti-corrosive Powder Paint for Construction Steel Bars

Composition

It is made of epoxy resin, curing agent, pigment, filler and additives through extrudingand processing

Main features

Excellent chemical property;

Excellent resistance to acid and alkali;

Good adhesive force on metal surface and as long as 50years of service life.

Application

It is applicable to the coating of bridges, water conservancy facilities and steel bar for reinforced concrete buildings. 

Product series

It can be made into powders with different glosses and colors and art powders according to customers’ requirements.

Technical 

indexes

Residue on sieve 125 μm

0 or based on negotiation

Color and appearance of paint film

The paint film should be smooth but slight orange peel is allowed

 and the color should meet the color difference specified.

Hardness

≥2 H

Bending mm

2

Gloss (60°)

High gloss ≥86, semi gloss 21-85, matt ≤20

Adhesive force (1×1 mm) Grade 6×6

0

Impact resistance kg.cm

≥40

Acid resistance (HCI 3%)240 h

The film has no change.

Alkali resistance (NaOH 5%) 168 h

Slight change is allowed but it shall be recovered within 2h

Salt spray resistance 400 h

≤ Grade 1

Damp-heat resistance 500 h

≤ Grade 1

Film thickness μm

50~60

Surface 

prepartion

The corresponding treatment method should be used based on the substrates, such as phosphating, chromizing,

 shot blasting or blast cleaning

1. The surface roughness should be 30 ~75 μm if reaching Grade Sa2.5 by shot blasting or blast cleaning.

2. Phosphating: degreasing- derusting- neutralizing- surface control- phosphating- passivating

Appearance of phosphating film: The phosphating film should be crystallized densely, continuously and evenly.

3. Chromizing: degreasing- rinsing- immersion cleaning- deoxidating- rinsing- chromizing