Home > About Us> Tech & Service

Hot dip galvanized steel pipe

Defects of hot dip galvanized pipe

Hot Dip Galvanized Steel Pipe
Galvanized Steel are those steel that has been covered with a layer of zinc metal.

In the production process and packaging process of hot dip galvanized, the appearance of hot dip galvanized steel strip and steel plate may occur following defects.

The excess liquid zinc from galvanized pot on the strip surface, which excess liquid zinc air knife blow to control the zinc coating thickness. Gas pressure of the air knife, air knife and strip pitch, strip speed will directly affect the thickness of the zinc layer. If the lack of supply instability of the air knife or air knife pressure can cause the accumulation of zinc coating, ie, zinc scar.

Purity of zinc coating is not enough, the original board surface dirt eclipse biological treatment is not sufficient and form the residue when copper, iron, arsenic and other impurities is higher levels of zinc coating. galvanized uncoated can easily lead to the surface of the steel dark spots. Galvanized steel surface exposed to moisture or rain immersion lead to zinc oxide and produce a white powder at a certain temperature. The surface of white rust corrosion resistance is greatly reduced and affect its use.

Galvanized sheet surface zinc layer is rugged and uneven thickness, or even the surface of small particles. because the air knife is is aspirated uneven when hot dip galvanized or improper air knife and strip spacing.




English Inglés SpanishEspañol
Tech & service
Sunny Steel Blog
Recommended products
Pipe fittings
Pipe fittings are used to connect pipes.
Welded steel pipes Weld steel pipes
We produce an extensive selection of weld steel pipe
Welded steel pipes Anti corrosion pipe
Anti-corrosio pipe is processed through the preservation
Ceramic-Lined Pipes
from a single spool piece to complete piping systems.
Pipe flanges
Pipe flange are a method of connecting pipes, valves.
Pipe Fitting Accessories
We are passionate in Stub Ends, Bolt Sets, Fasteners


About Sunny Steel

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

Link exchange