Hot Galvanizing Products
The grades of hot galvanizing products vary according to the different of the hot standards of the steel mills. But there are corresponding grades between grades and grades. Hot galvanizing products grades will vary with the steel and mechanical properties of the steel sheet.
Therefore, CAMELSTEEL suggests that purchaser should also change the selection according to different usage function at the time of purchase. The most used standards and grades in domestic are as follows:
Japanese standard: SGCC，CGCC
American standard: ATSM A 153-03
German standard: DX51D, DX52D, DX53D, DX54D, DX55D
B. Hot galvanizing products surface treatment.
1. Passivation treatment.
The passivation treatment is the last step in chemical cleaning. After cleaning and phosphating, the metal surface of galvanized steel sheet is very clean and activated. And it’s also susceptible to be corroded. Therefore, it must be immediately do the passivation treatment, so that generate protective film on the metal surface after cleaning, and also slow down the corrosion.
The process of forming a trivalent or hexavalent chromium layer on its surface with chromate solution and metal is called passivation, also known as chromizing. But passivation is rarely used alone, often supporting the use of phosphating to close the pores of the phosphating layer, and make the bare steel in the phosphating layer passivating. It can also inhibit the corrosion effect of residual phosphating accelerator.
2. Oil treatment.
It is a way to apply grease that in order to make galvanized steel plate won’t be corroded by the outside air, rain and other erosion in the storage and transportation process, resulting the corrosion and oxidation in the surface of hot-dip galvanized steel sheet, to achieve a better protection of the steel surface. Oil treatment is divided into fat liquoring and light oil.
3. The varieties of zinc spangle.
The zinc spangle of hot galvanizing steel sheet can be divided into big spangle, regular spangle, small spangle and zero spangle.
Thank you for any other magnificent post. Where else may just anybody get that kind of information in such an ideal way
of writing? I’ve a presentation subsequent week, and I am
on the look for such information.
I’ve been browsing online more than three hours today, yet I never found any interesting article like yours. It is pretty worth enough for me. In my opinion, if all webmasters and bloggers made good content as you did, the net will be much more useful than ever before.
Its such as you learn my thoughts! You appear to grasp so much approximately this, like you wrote the guide in it or something. I believe that you just can do with some percent to pressure the message house a bit, however instead of that, that is fantastic blog. A great read. I will definitely be back.
I really like what you guys are usually up too. This type of clever work and exposure! Keep up the wonderful works guys I’ve included you guys to my personal blogroll.
What’s Taking place i’m new to this, I stumbled upon this I’ve found It positively
helpful and it has aided me out loads. I hope to give a contribution & help
different customers like its aided me. Good job.
You should take part in a contest for one of the highest quality blogs on the
internet. I will recommend this blog!
I all the time used to read post in news papers but now as I am a
user of net therefore from now I am using net for articles
or reviews, thanks to web.