Galvanized sheet or coil is defined as a carbon steel sheet coated with zinc on both sides.
Continuous hot dipping, or electro-galvanizing are the two processes used to produce it.
A zinc coating is one of the most effective and economical methods of protecting bare steel from a
corroding environment. The zinc not only serves as a barrier between the steel and the environment,
it will sacrifice itself to protect the underlying steel sheet.
|
Grade |
SGCC / SGCH |
|
Type |
Surface Finish |
|
Quality standard |
JIS G3302 / 3312 |
|
Surface finish |
Normal spangle, large spangle, small spangle, matt surface |
|
Regular |
Standard spangles with flower pattern, suited for general use |
|
Zero |
More minimized spangles than regular, with a beautiful gloss, suited for general painting applications |
|
Thickness |
0.16-1.2mm |
|
Width |
914/1000/1219/1200/1250mm/1220mm Special width available. |
|
Zinc coating |
60-120G/M2 (both sides) |
|
Coil weight |
According to customer's requirements(3-7Tons) |
Sacrificial, or galvanic protection occurs when two dissimilar metals are in contact and coupled with water and oxygen.
Zinc corrodes preferentially to the iron in steel. This protection prevents corrosion of the steel at areas not covered with zinc.
Thus, the spread of corrosion from cut edges, drill holes, etc is minimized.