SGCC DX51D G40 Z120 Galvanized Steel Coil Hot Dipped Zinc Coating

Surface treatment and classification

1. The passivation
The zinc coating can be passivated to reduce the rust (white rust) in the condition of wet storage and transportation. However, the corrosion resistance of this chemical treatment is limited and, moreover, hinders the adhesion of most coatings. This treatment is generally not in the zinc iron alloy coating, in addition to the finishing surface, as a general, the production plant on other types of galvanized layer are passivation treatment.
2. Oil
Oiling can reduce the corrosion of steel plate under wet storage condition, and oiling the passivated steel plate and strip will further reduce the corrosion under wet storage condition. The oil layer should be able to be removed with a degreaser that does not damage the zinc layer.
3. Paint sealant
An additional corrosion protection, especially fingerprint resistance, is provided by applying an extremely thin transparent organic coating film. Lubricity can be improved when forming, and as the adhesion bottom of the subsequent coating.
4. The phosphating
Through phosphating treatment, the galvanized steel plate of various coating types can be coated without further treatment in addition to normal cleaning. This treatment can improve the adhesion and corrosion resistance of the coating and reduce the risk of corrosion during storage and transportation. After phosphating, it can be used with suitable lubricant to improve the molding performance.
5. Does not handle
Plates and strips supplied in accordance with this standard may not be passivated or oiled or coated or coated or phosphating only if the orderer so requests and is responsible for such non-treatment.

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FAQ

Q: Do you provide samples ?How can I get a sample to check your quality? Is it free or extra ?

A: Free samples are available for your checking and testing. And to get free samples, you need to send us you detailed receiving address (including post code) and your DHL/FedEx/UPS account for collecting samples, courier cost will be paid in your side.

Q: How is the quality of your products?

A: Our products are manufactured strictly according to national and international standard, and we take a test before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.

Q: Are you factory or trader?

A: Our company has been manufacturing and selling steel products for many years since 2009. We've gained our Export Right and become an integrated company of industry and trade in order to satisfy buyer's multi-request on different material and products.