Apakah itu Hot Dip Galvanize?
Dari arti kata dapat kita terjemahkan menjadi "Hot=Panas, Dip=naik/turun, Galvanize=melapisi".
Hot Dip Galvanize adalah proses pelapisan logam besi/baja melalui proses pencelupan kedalam lelehan seng cair panas. Proses ini akan melindungi logam besi/baja dari korosi (pengkaratan besi/baja) dengan melapisi seluruh permukaan besi (barrier protection) dan memberikan perlindungan secara katodik (catodic protection).
Proses korosi yang terjadi pada logam besi dapat ditunjukkan seperti pada gambar dibawah, dimana terjadi pengkaratan pada tower pipa dan beam penyusun jembatan.
Produk Hot Dip Galvanize dapat dilihat seperti gambar dibawah ini
Ketahanan Produk Hot Dip Galvanize tergantung dari ketebalan lapisan Hot Dip Galvanize dan Keadaan Disekitarnya. Ketahanan dapat dilihat pada gravik dibawah ini
Hot Dip Galvanizing Zinc Coating Provider In Pakistan
BalasHapusHot dip galvanizing zinc coating to mild steel MS for protection from rust to extend the life of MS structures, Hot Dip Galvanizing zinc coating the MS material in hot zinc after cleaning with acid and water, fabricated steel hot dip galvanized coating. Hot-dip galvanizing (HDG) is the process of coating fabricated steel by immersing it in a bath of molten zinc. There are three fundamental steps in the hot-dip galvanizing process;
1- Surface preparation
This is a very critical step in the application of any coating, if the surface cleaning is done properly then the coating will be smoother and more durable, in most instances where the coating fails before the end of its expected service life, it is because of incorrect or inadequate surface preparation. The surface preparation step in the galvanizing process is a very important step for quality control because zinc simply will not cover the unclean steel. Any failures or inadequacies in surface preparation will be immediately apparent when the steel is withdrawn from the hot dip zinc bath because the unclean areas will remain uncoated, if we apply the touchup paint at that area this will not protect the steel as much as zinc coating, we highly recommend the surface cleaning process should be properly to get the best result of coating.
Surface preparation consists of three steps:
a) Degreasing
b) Pickling
c) Fluxing
2- Galvanizing
Galvanizing is a process when steel is completely dipped in a bath (kettle) of molten zinc. 98% pure zinc and maintained at a temperature of approximately 449 °C, steel is the dip in the zinc tub at an angle by using a hoist. This allows air to escape from tubular shapes or pockets angle depend on the shape of the fabricated piece. This requirement to allow zinc reach every ware after complete dipping first clean the surface of melted zinc then withdrawn slowly the item from the galvanizing bath, extra zinc remove by draining, vibrating. Cool the article by dipping in the water or being left in the open air.
3- Inspection
The lase step is inspection this is a simple process visual inspection of galvanized material and checking of coating thickness with the help of coating measuring tool, the thickness depends on article thickness and special requirements, simple physical and laboratory tests may also be performed to determine thickness, uniformity, adherence, and appearance to ensure the coating is in compliance with specification requirements and approved as per ASTM standard requirements.
Alfazal Enginnering is a best Hot Dip Galvanizing Zinc Coating Provider In Pakistan
Hot Dip Galvanizing Zinc Coating Provider In Pakistan