prepainted galvanized steel coil supplier
PVDF Prepainted Galvanized Steel Coil
PE Prepainted Galvanized Steel Coil
Brick Pattern Prepainted Galvanized Steel Coil
Flower Pattern Prepainted Galvanized Steel Coil
Woodgrain Prepainted Galvanized Steel Coil
PET Film Prepainted Galvanized Steel Coil
HDP Prepainted Galvanized Steel Coil
SMP Prepainted Galvanized Steel Coil
Routinely Stocked In Standard Lengths
|Coating color||RAL colors||RAL colors|
|Coating Thickness||Top: 8-35 um;|
Back: 3-25 um
|Top: 8-35 um;|
Back: 3-25 um
|Back side coatingcolor||Light grey ,white and so on||Light grey ,white and so on|
|Top paint||PVDF, HDP, SMP, PE, PU||PVDF, HDP, SMP, PE, PU|
|Prime paint:||Polyurethane, Epoxy, PE||Polyurethane, Epoxy, PE|
|Back paint||Epoxy, Modified polyester||Epoxy, Modified polyester|
Types of Prepainted Galvanized Steel Coil
Prepainted galvanized steel coil is a kind of prepainted steel coil (PPGI coil), which is divided into two types: prepainted galvanized and printed galvanized. It uses galvanized steel as the base metal. The zinc layer has strong corrosion resistance. Coupled with painting, it is more durable than galvanized steel. Metal-coated steel goes through a number of cleaning procedures, pre-treatment solutions, and finally gets multiple layers of organic coatings, including laminates, vinyl dispersions, and paints.
Glossy PPGI Coil
Embossed PPGI Coil
Wood Grain Steel Coil
Matte PPGI Coil
Prepainted Galvanized Steel Coil (PPGI Coil) is one of our main products. Metal in China® is a leading manufacturer of prepainted galvanized steel coils in China, with four prepainted production lines and two printed coil production lines.
PPGI coil factory in stock
Here is a video showing one of our color coating lines at Metal in China®(XINTUOYUAN) PPGI steel factory. Welcome to visit our factory on-site or by video chat.
prepainted galvanized Coil Coating Line
PPGI Steel Structure
Prepainted galvanized steel sheet is made of electro-galvanized and hot-dip galvanized steel as substrates. After pretreatment (degreasing and chemical treatment), one or more layers of coatings are continuously applied to the surface of the base metal by coil coating and then baked. It includes base metal (cold rolled steel), zinc coating, chemical conversion coating, primer coating, and top coating.
Types of colour-coating: standard polyester, matt polyester, decoprint.
Top Paint: The top paint can form a dense film to reduce water permeability and oxygen permeability. The topcoat is able to block sunlight and prevent ultraviolet rays from damaging the coating;
Primer Paint: The primer often uses PE paint, which has better adhesion. So the top paint is not easy to desorb after water penetration to improve its corrosion resistance.
Zinc Coating: The zinc coating has a great influence on the service life of PPGI steel. The thicker the zinc coating, the better the corrosion resistance.
Substrate: Generally, it is a cold-rolled sheet with different strengths, which determines the mechanical properties of the color-coated sheet.
Back Paint: It aims to prevent the steel from corroding from the inside. If bonding is required on the back side, a single-layer back paint is recommended.
The coatings used include polyester (PE), silicon-modified polyester (SMP), high-durability polyester (HDP), polyvinylidene fluoride (PVDF), etc. They are widely used in construction, transportation, home appliances, solar energy, and furniture. and other industries. Prepainted steel for home appliances is mainly used as the side panels of refrigerators, DVD casings, air conditioners, freezers, and washing machine casings.
PPGI Coil Color
Prepainted galvanized steel coil colors include sky blue, grey, silver, traffic red, moss green, olive green, leaf green, etc. Also, we offer printing patterns, such as flower, grass, wood grain, marble, and brick, as well as custom patterns. Welcome to send us a RAL color code or pattern or a sample to customize your own PPGI coated coil.
Below are the patterns we customized before, including wood grain, brick, grass, traffic sign, flower, etc. You can also send us a sample or pictures to order your own pattern PPGI coils.
Pattern PPGI Coil
PPGI Steel manufacturing Process
PPGI is pre-painted galvanized steel, also known as pre-coated steel, color coated steel etc. Using Hot Dip Galvanized Steel Coil as the substrate, PPGI is made by first going through surface pretreatment, then the coating of one or more layers of liquid coating by roll coating, and finally baking and cooling.
With the most advanced facilities and technology, Metal in China®(XINTUOYUAN) has a set of manual and automatic production system for galvanized coils, which can meet customers’ requirements for different parameters and high performance of products.
1. Pre-Treatment Process
Some rolling oil and other contaminants remain on the surface of cold rolled steel sheets following processing. These are removed by passing the electrically charged sheet through an alkaline solution which induces an electrochemical reaction.
The material properties of the pre-treated steel sheet can be altered and improved through recrystallization during the annealing process.
3. Hot-Dip Galvanizing
After passing through the annealing furnace, steel sheets are dipped into a zinc pot where molten Zn is coated onto the surface. The desired coating weight is achieved by removing excess zinc before solidification with high-pressure air from an air knife.
The surface of a steel sheet, after the air knife, can be coated with a zinc compound prior to reheating in an annealing process. Zn atoms diffuse into the Fe to create a Zn-Fe series alloy.
5. SPM & Chemical Treatment
In order to achieve a flat surface and an elegant finish, the steel sheet is processed with a skin pass mill. In order to prevent the white rust, which often forms on the surface of activated zinc, and to improve corrosion resistance, the surface is coated with a Cr-free resin.
6. Inspection & Coiling
Located at the line’s exit section are a side trimmer, inspection table, oil coating machine and coiling equipment. At this station, all products are inspected and judged relative to material specifications required by the customer.
prepainted galvanized Coil Coating Line
Pre-painted galvanized steel coil Applications
- Construction Industry: to manufacture exterior and Interior products such as metal shingles, corrugated sheeting, sandwich panels, profiles, metallic ceilings, skirting boards, decorative panels inside heated and non- heated rooms, elevators, doors window shutters, shelves etc.
- Automotive Industry: to manufacture external and internal car body parts (car doors, car boots, oil filters, dashboards, windscreen wipers etc.)
- Manufacture of Home Appliances, Furniture, and Consumer Goods: metallic furniture, lighting equipment, shelves, radiators, сar doors, car boots etc.
Water drainage system
Additional steel processing services
Cut large coils into small coils or Strip
For carbon steel coils, we offer the additional service of cutting large coils into smaller coils or strips.For container transportation, the loading weight of each container usually cannot exceed 26 tons, and each large roll is usually around 28 tons.
At seaports, each large steel coil is usually cut into 3 smaller coils for easy loading into containers. For bulk carrier transportation, the roll weight is usually required to be less than 18 tons, so most of the time, it is also necessary to cut a large roll into 2 small rolls.
flat coils into steel plate
For the final application, the coil needs to be flattened and cut into steel plates, so we flatten the coil and cut the coil into the required size of steel plate. In order to save the cost of container loading, it is loaded into a 20-foot container, so the cutting length is below 5800mm, usually cut into lengths of 2440mm and 5800mm according to requirements, and the width is usually 1220mm and 1500mm. After cutting the steel coil into steel plates, we can do black paint on the surface of the plates to make the plates rust-proof.
frequently asked questions
Hot dipped galvanized steel sheet & coil is made of carbon steel coated in zinc utilizing the hot-dip process. The end result of this process is a layer of zinc on each side of the steel sheet or coil that is tightly adhered to the steel through the formation of an iron-zinc alloy bonding layer.
Pre-paint steel is a bare metal substrate or corrosion resistant substrate that has had paint applied to both sides through a continuous coil coating process, which produces a uniform paint finish. The metal is unwound, cleaned and chemically treated during the process.