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  • Electro Galvanized Coil EG Coil

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Electro Galvanized Coil EG Coil
Electro-galvanized steel is a plating process where the steel is placed in an electrically charged solution of zinc and saline. This causes the zinc to chemically bond to the conductive steel. Electro-plating is frequently used for coiled sheet steel, which is later formed into shapes such as c-purloins, and corrugated sheets or can be formed and welded into pipes and tubes.
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Galvanized Coil Description

Through electrolytic galvanizing, a uniform and dense zinc layer is finally formed on the surface of the steel, but the mechanical properties of the material are still maintained. Electrogalvanized steel is usually sold in coil or sheet form. EG coil is a kind of material that can be cut, slitted and profiled for other purposes. The steel grade of galvanized steel consists of base metal grade, galvanized (E), galvanized layer type and weight. The electro-galvanized products based on SPCC, SPCD, SPCE, SPCF and SPCG are named SECC, SECD, SECE, SECF and SECG respectively.
Full cold galvanizing process:

Chemical degreasing → hot water washing → water washing → electrolytic degreasing → water washing → acid washing → rust removal → water washing → electrogalvanizing process → water washing → passivation → hot water washing → drying → quality inspection → packaging and sales


Scope of Application

Building Materials Field
Electrogalvanizing has a wide range of applications in the field of building materials. First of all, electro-galvanizing can be used to manufacture construction steel, which not only prevents metal oxidation and prolongs its service life, but also enhances the toughness, strength and corrosion resistance of steel, and improves the performance of steel. Secondly, in the decoration of building exterior walls, electro-galvanized aluminum alloy, electro-galvanized iron alloy and other materials are also widely used, which can protect the steel structure and prevent oxidation, but also has the characteristics of beauty and fire prevention.
Automobile Manufacturing Field
Electrogalvanizing is also a commonly used material in the field of automobile manufacturing. Electro-galvanized coating can be used for surface protection and repair of automobile parts to avoid oxidation corrosion and damage, and to improve the service life of automobiles. The electro-galvanized coating can also be used in the manufacture of parts such as car frames and casings to avoid oxidation and corrosion, and improve the overall quality and durability of the car.
Home Appliance Manufacturing Field
In the field of home appliance manufacturing, galvanizing also has its important applications. For example, the manufacture of refrigerators, washing machines and other household appliances shell, lining, refrigerator and other parts, usually need to use electro-galvanized material for surface coating, to prevent metal oxidation, improve appearance and performance.
 

Product Parameters

Product Name

Galvanized Coil

Thickness

0.12mm-3.5mm

Width

600mm-1500mm

Length

508mm/610mm, Support Customization

Standard

AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.

Zinc Layer

Hot Galvanizing: 60-275g/m²

Pre-galvanized: 80-275g/m²

 

Chemical Composition

Standard

Grade

C

Si

Mn

P

S

Ti

Forcold Forming

Chinese Standard

DX51D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX52D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX53D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX54D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX56D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX57D+Z

0.12

0.50

0.60

0.100

0.045

0.30

Forcold Forming

Japanese Standard

SGCC

0.15

0.50

0.80

0.050

0.030

0.025

SGCD1
SGCD2

0.12
0.10

0.50
0.50

0.60
0.45

0.040
0.030

0.030
0.030

0.025
0.025

SGCD3

0.08

0.50

0.45

0.030

0.030

0.025

SGCD4

0.06

0.50

0.45

0.030

0.030

0.025

For Structure

Japanese Standard

SGC340

0.25

0.50

1.70

0.200

0.035

0.025

SGC400
SGC440

0.25
0.25

0.50
0.50

1.70
2.00

0.200
0.200

0.035
0.035

0.150
0.150

SGC490

0.30

0.50

2.00

0.200

0.035

0.025

SGC510

0.30

0.50

2.50

0.200

0.035

0.025

For Structure

AISI Standard

S220GD+Z

0.20

0.60

0.70

0.100

0.045

0.025

S250GD+Z

0.20

0.60

0.70

0.100

0.045

0.025

S280GD+Z

0.20

0.60

0.70

0.100

0.045

0.025

S320GD+Z

0.20

0.60

0.70

0.100

0.045

0.025

S350GD+Z

0.20

0.60

0.70

0.100

0.045

0.150

S550GD+Z

0.20

0.60

0.70

0.100

0.045

0.150

 

Mechanical Properties

Grade

Yield Strength MPa≥

Tensile Strength MPa≥

Elongation A%≥

DX51D Z/ZM/AZ/AM

240-380

270-500

22

DX52D Z/ZM/AZ/AM

140-300

270-420

26

DX53D Z/ZM/AZ/AM

140-260

270-380

30

DX54D Z/ZM/AZ/AM

120-220

260-350

36

S220GD Z/ZM/AM

220

300

20

S250GD Z/ZM/AZ/AM

250

330

19

S280GD Z/ZM/AM

280

360

18

S300GD A/AM

300

380

18

S320GD Z/ZM/AM

320

390

17

S350GD Z/ZM/AZ/AM

350

420

16

S450GD A/AM

450

480

15

S550GD Z/ZM/AZ/AM

550

550

-

 

Galvanized Surface Selection

Zero Spangle

Minimized Spangle

Normal Spangle

Large Spangle

 

Use of The Environment

Recommended Zinc Thickness

Indoor Use

Z10 or Z12 (100g/㎡or 120g/㎡)

Suburbs

Z20 and Painting (200g/㎡)

Urban or Industrial Area

Z27 (270g/㎡) or G90 (US Standard) and painted

Coastal Area

Thicker than Z27 (270g/㎡) or G90 (US Standard) and painted

Punch or Deep Drawing Application

Thicker than Z27 (270grams/㎡) or G90 (US Standard) avoid coating peeling after stamping

 

Surface Treatment Type

Code

Features

Chromic Acid Treatment

C

Good corrosion resistance, suitable for bare state

Chromic Acid Treatment+Oiling

S

Good corrosion resistance

Phosphoric Acid Treatment (Including Sealing Treatment)

P

Have a certain corrosion resistance, good paint performance

Phosphoric Acid Treatment (Including Sealing Treatment)+Oiling

Q

Has a certain corrosion resistance, good paint performance, prevent rust during transportation and storage

Phosphoric Acid Treatment (Excluding Sealing Treatment)

T

Have a certain corrosion resistance, good paint performance

Phosphoric Acid Treatment (Excluding Sealing Treatment)+Oiling

V

Has a certain corrosion resistance, good paint performance, and prevent rust

Oiling

O

Prevent rust during transportation and storage

No Treatment

M

Suitable for immediate painting

 

Material Comparison

Chinese Standard

Japan Standard

European Standard

DX51D Z/DC51D Z (CR)

SGCC

DX51D Z

DX52D Z/DC52D Z

SGCD1

DX52D With

DX53D Z/DC53D Z/DX54D Z/DC54D Z

SGCD2/SGCD3

DX53D Z/DX54D Z

S220/250/280/320/350/550GD Z

SGC340/400/440/490/570

S220/250/280/320/350GD Z

DX51D Z/DD51D Z (HR)

SGHC

DX51D Z

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