SGCC Prepainted Galvanized Steel Coil For Steel Roofing Sheet Coil
In White Color
PPGI is pre-painted galvanized iron, also known as pre-coated
steel, coil coated steel, color coated steel etc., typically with a
hot dip zinc coated steel substrate.
The term is an extension of GI which is a traditional abbreviation
for Galvanized Iron. Today the term GI typically refers to
essentially pure zinc (>99%) continuously hot dip coated steel,
as opposed to batch dip processes. PPGI refers to factory
pre-painted zinc coated steel, where the steel is painted before
forming, as opposed to post painting which occurs after forming.
The hot dip metallic coating process is also used to manufacture
steel sheet and coil with coatings of aluminium, or alloy coatings
of zinc/aluminium, zinc/iron and zinc/aluminium/magnesium which may
also be factory pre-painted. While GI may sometimes be used as a
collective term for various hot dip metallic coated steels, it more
precisely refers only to zinc coated steel. Similarly, PPGI may
sometimes be used as a general term for a range of metallic coated
steels that have been pre-painted, but more often refers more
precisely to pre-painted zinc coated steel.
Zinc coated steel substrate for PPGI is typically produced on a
continuous galvanizing line (CGL). The CGL may include a painting
section after the hot dip galvanising section, or more commonly the
metallic coated substrate in coil form is processed on a separate
continuous paint line (CPL). Metallic coated steel is cleaned,
pre-treated, applied with various layers of organic coatings which
can be paints, vinyl dispersions, or laminates. The continuous
process used to apply these coatings is often referred to as Coil
|Thickness tolerance||+/- 0.02mm|
|Zinc coating||Z40-Z275 AZ30-AZ150|
|Color||Grey white, sea blue, red or any RAL standard|
|Painting||Top: 20+/-5um Back: 5mic---8mic|
|Standard||ASTM, AISI, DIN, GB,JIS|
|Material||SGCC,SGCD,SECC,SECD,DX51D+Z, S350GD, S450GD, S550GD|
|Technique||Cold rolled, hot-dipped galvanizing, color coated, galvanized,
|Spangle||Zero spangle, regular spangle or normal spangle|
|Surface Structure||Galvanized, Galvalume, zero spangle, regular spangle or normal
|Surface treatment||Chromate and oiled, chromate and non-oiled|
|Packing||Export standard, or according to client requirement|
|Min order||50 tons|
|Coil weight||3-6tons or as client requirement.|
Structure of Prepainted Galvanized Steel Coil:
* Topcoat (finishing) which provides color, pleasing appearance and
appearance and a barrier film to enhance long-term durability.
* Primer coat to prevent undercutting of paint and enhance
* Pretreatment layer applied for good adhesion and to enhance
* Base steel sheet.
Application of Prepainted Galvanized Steel Coil:
1. Application of color coated steel sheet: Outdoor: roof, roof
structure, surface sheet of balcony, frame of window, door, door of
garage, roller shutter door, booth, Persian blinds, cabana,
refrigerated wagon and so on. Indoor: door, isolater, frame of
door, light steel structure of house, sliding door, folding screen,
ceiling, internal decoration of toilet and elevator.
2. Refrigerator, refrigerated wagon, washing machine, electric
baker, automatic selling machine, air conditioner, copying machine,
cabinet, electric fan, vacuum sweeper and so on.
3. Application in transportation
Ceiling of automobile, board , internal decoration board, external
shelf of automobile, carriage board, car ,instrument panel, shelf
of operating platform, trolley bus, ceiling of railway, color
isolator of ship, furniture of ship, floor, cargo container and so
4. Application in furniture and sheet metal processing
Electric warming oven, shelf of water heater, counter, shelves,
chest of drawers ,chair, archive cabinet, book shelves.