This process is to remove the left over rolling oil on the strip with the flame and Purging by Electrolysis in order to increase adhesion when painting.

Zinc plating is done through a zinc bath after annealing process in order to secure processability and the quality of the material of the final product. The amount of plating shall be adjusted to the customer request by air blowing(60~720g/㎡).

It is a process to form an alloyed layer of Zn-Fe by heating a strip as much as 550℃ at a furnace in order to improve weldability which is the weak point of anti-corrosive steel sheets.

Galvanized steel on the surface of the plate is normally coagulated at room temperature, which become have the native crystal pattern and luster of galvanized steel.(Construction Materials, Pipe, Inner Plate of Home Appliances, Sashes, etc.)

It is a product forming fine crystal grains by inhibiting creation of galvanized steel crystal while galvanized steel on the surface of plate is coagulated, which has even surface, good looking appearance, excellent corrosion resistance and paintability (used for furniture, inner / exterior plate of home appliances, painting, inner plate of automobile).

It is a product forming an alloyed layer heating a galvanized coil with (~), which has excellent weldability and paintability compared to SR and SM material (home appliances, inner /exterior plate of automobile, and painting)

Zn with stronger ionization tendency than iron becomes compound of Zn carbonate and protects the surface of iron. Even though the surface of zinc is destroyed, Zn melts because of its stronger ionization tendency and iron gets long life by Zn sacrificial anode.

If Zn is exposed to the air as a reactive metal, it becomes zinc oxide by sharply reacting with oxygen and also forms a thin film of basic zinc carbonate by reacting with carbon dioxide. This thin film prevents rust from corrosive environment with good dense adhesion.

The life of Hot Dip Galvanized Iron & Steel is proportional to the coating weight of Zn. For same coating weight, however, the life may be largely changed by the usage environment. The corrosion resistance of hot dip galvanized iron and steel in a city or industrial area is just 25~40% compared to an unpolluted rural area. The interior life at the same area is longer 5-10 times than the exterior life.

Due to excellent adhesion of Zn and ultra thin alloyed layer of Fe-Zn, flaking hardly does not occur even after drawing work. Its formability is very excellent as much as cold rolled steel plates and it is available for diverse works.

Hot Dip Galvanized Iron & Steel is mostly used after final coating, and the corrosion resistance of painting products depends on the disk, pre-treatment before painting and a kind of paint and varnish.

For it has better electric conductivity than iron, such good conductivity makes electric resistance on the contact surface of the steel plate small and heating value is also small.

It has the lower meting point than iron. So, Zn attaches to electrode when welding and such attachment causes low continuous weldability.

Its current density falls a little bit due to comparatively wide contact areas by welding force(electrode force).

For alloyed galvanized steels, its plating layer is Fe-Zn alloy coating. So, its corrosion device is different from one of hot dip galvanized Iron & Steel. Rust is remarkably generated in the severe accelerated corrosion test like a salt spray test by the iron in the alloy layer much than hot dip galvanized Iron & Steel, but its white rust resistance is stable under constant temperature and humidity.

For the surface of alloyed galvanized steel is made of Fe-Zn alloy, its weldability is good with good hardness and high melting point compared to pure Zinc.

It is good as much as cold rolled steel.

Paintability is improved because there is no spangle on the surface, corrosion resistance is excellent because of low electromotive force, and ark and seam weldability is outstanding.

CGCC

SGCC

SGCC

A526

S to 1Z

CGCF

-

-

A527

S to 2Z

CGCD

SGCD1

SGCD1

A528

S to 3Z

CGCD

SGCD2

SGCD2

S to 4Z

CGCN

SGCD3(N)

SGCD3(N)

A642

S to 5Z

CGCE

-

-

-

-

-

-A

-A

A361

CGC(H)35

SGC(H)35

SGC(H)35

A446GrA

-

-

-

A446GrB

Ste250

CGC(H)40

SGC(H)40

SGC(H)40

A446GrC

Ste280

CGC(H)45

SGC(H)45

SGC(H)45

A446GrD

Ste320

CGC(H)50

SGC(H)50

SGC(H)50

-

Ste350

CGH55

SGH55

SGH55

-

CGC58

SGH58

SGH58

A446GrE

-

CGCHS35

-

-

-

-

CGCHS40

-

-

-

-

CGCHS5

-

-

-

-