Hot-dip zinc coated steel plate HX220PD+Z,H220PD+Z,H220PD+Z,H220PD+ZF,H220PD,HX220PD generally receive surface protection at rolling plants.The period of protection afforded depands on the outside atmospheric conditions.These surface protection for galvanized steel plate and coil HX220PD+Z,H220PD+Z,H220PD+Z,H220PD+ZF,H220PD,HX220PD including Chemical passivation,Oiling,Chemical passivation and oiling,sealed,phosphated and untreated.Generally the galvanized steel sheet HX220PD+Z,H220PD+Z,H220PD+Z,H220PD+ZF,H220PD,HX220PD shall be done surface treatment after rolling,if when customers indicate in their purchase order without surface treatment terms,we can delivery these galvanized steel materials under untreated condition.In this case,there is increased risk of atmospheric corrision.

Now Xinsteel give the chemical composition for hot dip galvanized steel HX220PD+Z,HX220PD+ZF as belows:

Chemical composition for Hot dip galvanized steel HX220PD (Max):