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PPGI

PPGI || ||
Typical Process of Colour Coating
  GALVANISED STEEL GALVALUME

ALUMINIUM
Tensile strength
Thickness range (TCT)
Width (mm)Coil weight (MT)
COIL ID 508mm
Metal CoatingPrimer (Microns)
Back coat (microns)
Top coat (microns)
Profiled Sheets/Cut to
length SheetsGuards film (optional)		 240/350/550 Mpa
0.2-0.8 mm-750-1250 mm
(standerd – 1220 mm)
3 – 6 MT
120 GSM or higher as per
customer specificationsUpto 8 microns or per customer specifications
Upto 8 microns or per customer specifications
Upto 25 microns or per customer specifications
Available in any transpotable length, packed in crate of 3 -5 tons each40 microns or as per customer specifications		 240/350/550 Mpa
=0.200.8 mm
1220 mm3 -6 MT
508 mm
150 GSM or as
per customer
specifications

As per alloy
0.3 – 1.2 mm
750 – 1250 mm
(standard – 1220mm)
3 – 6 MT
508 mm
None needed

TEST

 RESULTS TEST METOD
Resitance to Chemical corrosion
(5% NaOH & 5% H2SO4)
Solvent rub (MEK)
Pencil harness test
Scratch resistance
Impact cupping test
Bend test
Gloss at 60-degreeAdhesion/cross hatch test
Salt spray test
Humidity test
QUV weathering test		 Good

Min 100 double rub
2H
1500 gm
Min 40” Lb
>6mm
2T
80-85/25-30
(depending on finish)
100%
Min 750hrs
Min 1000 hrs
Min 1000 hrs

 ECCA-T-18

AICC-23
ECCA-T-4/IS 14246:1995
IS 101
ECCA-T-5 14246:1995
IS-10175 (82)
ECCA-T-7 / IS 14246:1995
ECCA-T-4

ASTMD-3359
ECCA-T-8
ECCA-T-9
ECCA-T-10
Flatness test upto 18 mm

IS 14246:1995

 

Test results on Zn coated steel sheets (340 Mpa)
Standard tolerance & Conditions Apply. The above results are indicative.

PPGI sheet-500x500

Credit to http://trbex.com/

PPGI is pre-painted galvanised 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 Galvanised 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 galvanising 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 Coating.

The steel thus produced in this process is a prepainted, prefinished and ready for further processing into finished products or components. to use material.

The coil coating process may be used for other substrates such as aluminium, or aluminium, stainless steel or alloy coated steel other than “pure” zinc coated steel. However, only “pure” zinc coated steel is typically referred to as PPGI. For example PPGL may be used for pre-painted 55%Al/Zn alloy-coated steel (pre-painted GALVALUME(r) steel*)

Credit to Wikipedia

 

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