Pre-painted Steel Coil

Color coated steel coil is a kind of high performance metal coil treated by precision coating process. Its base material is cold-rolled steel or galvanized steel, the thickness range is usually 0.13mm to 1.2mm, and the width can reach 1250mm to meet different engineering needs.

Core Production Step Of Pre-painted Steel Coil

1.Substrate Pretreatment

● Degreasing

By alkaline solution or electrolytic cleaning, completely remove the oil on the surface of the steel plate (residual oil ≤50mg/m²) to ensure the adhesion of the coating.

● Phosphating Treatment

Compact phosphate conversion film (film weight 1.5-3.0g/m²) for enhanced rust protection (according to ISO 9717)

● Passivation

Some processes increase the chromate passivation layer (Cr³ + 10mg/m² content) for improved corrosion resistance

2.Multi-layer Coating

● Primer

Epoxy based coating, thickness 5-10μm, provides substrate rust protection and adhesion (scratch test Class 0, ASTM D3359)

● Topcoat

Polyester, silicone modified polyester or fluorocarbon resin, thickness 5-45μm, color and weather resistance (QUV 2000 hours light retention ≥80%)

● Back Paint

Epoxy or acrylic coating, thickness 5-15μm, protects the back of the steel plate from environmental erosion.

3.High-temperature Curing

The coating is cured for 20-30 seconds in a continuous baking oven at 200-240℃ to form a cross-linked network structure (pencil hardness ≥H, ASTM D3363).

Pre-painted Steel Coil Product advantage

1.Weather fastness

This product has high UV resistance, fade resistance, design service life of 10-35 years (depending on the selection of materials, layers)

2.Light weight

The thickness of this product is 0.13-1.2mm, the density is 7.85g/cm³, which can effectively reduce the building load

3.Aesthetic

This product offers a variety of colors (RAL color card standard) and imitation wood grain, stone grain effect

4.Substrate diversity

Available in hot dip galvanized (GI) or aluminum-plated zinc (GL) steel plates, this product provides additional corrosion protection (3-5 times increased corrosion resistance of the zinc layer)

5.Resin Type

Polyester: Economical and versatile, suitable for indoor environments.

Silicon-modified polyester: Enhanced temperature resistance and UV resistance, suitable for outdoor construction.

Fluorocarbon: Super weather resistance (35 years + life), used in landmark buildings.

Pre-painted Steel Coil Application scenario

Construction field：roof, wall, sandwich board (such as factory, airport, stadium)

Home appliances：refrigerator, washing machine, air conditioning shell

Total assets：indoor ceiling, partition

Product data

Prepainted galvanized steel coils hs code 72107010

The HS code 72107010 refers to Prepainted Galvanized Steel Coils under the Harmonized System (HS) used for international trade classification. This specific code falls under Chapter 72, which is dedicated to Iron and Steel products.

Here is a breakdown of HS Code 72107010:

72: Chapter for Iron and Steel.

1070: Subheading for Flat-rolled products of iron or non-alloy steel, of a width of 600 mm or more, plated or coated with zinc.

10: Further classification that specifies prepainted, varnished, or coated with plastics.

HS Code 72107010 is used for:

Prepainted Galvanized Steel Coils or sheets that have been coated with a layer of zinc (galvanized) and painted for added protection and aesthetics.

This code is used by customs authorities to track and classify these products during import and export. Depending on the country, the code might be linked to specific import duties, tariffs, and trade regulations.