- Home
- About us
- Products
- square steel pipe
- rectangular steel pipe
- round steel pipe
- shaped tube
- LSAW steel pipe
- zinc aluminium magnesium coating steel pipe
- galvanized steel pipe
- ERW steel pipe
- seamless steel pipe
- spiral steel pipe
- LINE PIPE&OCTG
- stainless steel pipe
- steel coil
- steel plate
- ship building steel pipe
- photovoltaic bracket
- steel profile
- Faqs
- News
- Certificate
- Contact us
Will galvanized pipes rust?
time2025/03/21
- There are two types of galvanized steel pipe: hot-dip galvanized pipes and cold-dip galvanized pipes. Relatively speaking, hot-dip galvanized pipe are less prone to rust than cold-dip galvanized pipe.
Will galvanized steel pipes rust?
When steel pipes are exposed to the air, they react with oxygen, or are corroded by oxygen elements in the water to become oxides, which will rust. Galvanized steel pipes are galvanized to form a galvanized layer to isolate the air, so they are more corrosion-resistant and not easy to rust. So will galvanized pipes rust?
Generally speaking, galvanized steel pipes are not easy to rust, which does not mean that they will not rust. It is just a matter of time. After a long time of use, galvanized pipes will still rust; in addition, if the environment is relatively humid, or if it is exposed to rain for a long time, the galvanized steel pipe will quickly oxidize and spot, and then it will rust. In addition, there are two types of galvanized steel pipes: hot-dip galvanized pipes and cold-dip galvanized pipes. Relatively speaking, hot-dip galvanized pipes are less likely to rust than cold-dip galvanized pipes.
2. How long does it take for cold-dip galvanized steel pipes not to rust
The rust time of galvanized pipes is mainly related to the galvanizing method, the thickness of the galvanized layer, the amount of galvanizing, the use environment and other factors. Generally, cold-dip galvanized pipes rust faster: the galvanizing amount of cold-dip galvanized steel pipes is low, and this type of galvanized pipe is only galvanized on the outside, and the inside of the steel pipe is not galvanized. The amount of zinc on one side is about 20g/㎡, so it is easier to rust. Generally, cold-dip galvanized steel pipes will begin to rust in about a year under normal use; if the thickness is thicker, the rust time will be extended. 2.75mm or less can be used for 2-3 years, and 3.0mm or more can be used for 3-5 years.
3. How to remove rust from galvanized pipes
If the galvanized pipe is rusted, it can be removed by some methods. The main methods for removing rust from galvanized pipes are:
1. First use a solvent to clean the surface of the steel to remove organic matter on the surface.
2. Then use tools such as wire brushes to remove rust, mainly use wire brushes to remove loose or tilted rust, welding slag, etc. 3. Use pickling to clean the galvanized pipe, and the rust on it is almost cleaned.
