Will the galvanized steel pipes commonly used in industry rust

First, will the galvanized steel pipes rust?
When the steel pipe is exposed to the air, it will rust when it reacts with oxygen or is corroded by oxygen elements in the water to become oxides. The galvanized steel pipe is galvanized to form a galvanized layer to isolate the air, so it is more corrosion-resistant and not easy to rust. So will the galvanized steel pipe rust? Generally speaking, galvanized steel pipes are not easy to rust, but it does not mean that they will not rust. It is just a matter of time. After a long time of use, galvanized steel pipes will still rust. In addition, if the environment is relatively humid, or 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 steel pipes and cold-dip galvanized steel pipes. Relatively speaking, hot-dip galvanized steel pipes are less likely to rust than cold-dip galvanized steel pipes.

Second, how long does it take for cold-dip galvanized steel pipes to not rust?
The rust time of galvanized steel 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 steel pipes rust faster: the amount of galvanizing of cold-dip galvanized steel pipes is low, and this type of galvanized steel 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 conditions; if the thickness is thicker, the rust time will be longer, 2.75mm or less for 2-3 years, and 3.0mm or more for 3-5 years.

Third, how to remove rust from galvanized steel pipes
If galvanized steel pipes are rusted, they can be removed by some methods. The main methods for removing rust from galvanized steel 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 using wire brushes to remove loose or tilted rust, welding slag, etc.
3. Use pickling to clean the galvanized steel pipe, and the rust on it is almost cleaned.