The processing equipment in our factory, which includes cut, assemble, weld, drill, and sandblast. The fabrication types of equipment make the steel structure from raw materials to the finished building metal.
Hot-dip galvaning is a form of galvanization, it is the process of coating iron and steel with zinc, which alloys with the suface of the base metal when immersing the metal in a bath of molten zinc ant a temperature of around 450 C(840 F).Hot-dip galvanization extend the life of the steel structure construction more effectively, and the appearance more attractively.
Galvanized steel is an ideal choice for those trying to balance cost and longevity in outdoor projects however the effectiveness of galvanized steel is sevsrely limited in marine environments. In harsh environment, the zinc oxidizes quicklu into "white rust" which washes away leaving the steel exposed.Paint your galvanized projects is an easy way to provide an extra layer of protection.
Due to the fact that hot dip galvanizing has been used to protect iron/steel for such a long tione, there are a variety of terms that have been used to describe the process, including galvanisation, galvanising and hot dip galvanization.
Rencent reductions in the aggressiveness of the atmosphere towards zinc, and thre stability of costs of applying the coating mean that hot dop galvanizing today costs less and lasts long.
This will help to appreciate the design considerations, As well as to understand the galvanizing process.
The galvanized coating shall be contirnuous and as smooth and evenly distributed as possible and shall be free of defacts that may affect the stated use of the article.The coating shall be free from blisters, I.E. Raised areas separated from the solid metal,Roughness,Sharp points and flux residues. Lump and zinc ash are not permitted where theymay affect the intended end use of the galvanized product.Auy wet storage staining which is formed at the galvanizer's plant shall be removed prior to the material leaving the plant, Unless prior arrangements have been made.The underlying coating thickness after this removal treatment shall exceed the specified minimun value.
Requirement for coting thickness and mass for articles that are not centrifuged as flowing:
Article thickness |
Local coating thickness minimumμm |
Average coating thickness minimum |
Average coating mass minimum |
≤1.5 |
35 |
45 |
320 |
>1.5 ≤3 |
45 |
55 |
390 |
>3 ≤6 |
55 |
70 |
500 |
>6 |
70 |
85 |
600 |
<8 |
25 |
35 |
250 |
≥8 |
40 |
55 |
390 |
According with AS/NZS 4680 "Standard Practice for Conducting Case Studies on Galvanized Structures."All coating thickness measurements still meet or exceed AS/NZS 4680 specifications for new galvanizing. Even with cruel winters. the steel structure is expected to remain corrosion maintenance-free for many years to com.Hot-dip galvanizing contunues to be the most cost-effective, hassle-free corrosion protection system available for structural steel bridges across America.For information about the life cycle cost advantage of hot-dip galvanizing
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