Cold drawn tube will not rust and processing degree

- Mar 02, 2019-

The cold drawn tube is produced on the basis of cold drawing during the operation. Because of the relatively high temperature of the cold drawn tube during operation, the effect in long-term use and continuous development is relatively large. And can not be changed, it can be said that the range and frequency of use of cold drawn tubes in steel pipes are relatively large. The cold drawn tube will not rust according to the processing steps and processing procedures, but due to improper maintenance and improper maintenance, the use of cold drawn tubes is also rusting in life.

Why does the cold drawn tube rust?

When brown rust spots (dot) appeared on the surface of the cold-drawn tube, people were amazed: "The cold-drawn tube is not rusted, and the rust is not a cold-drawn tube. It may be a problem with steel." In fact, this is a one-sided misconception about the lack of understanding of cold-drawn tubes.


The cold drawn tube has the ability to resist atmospheric oxidation - that is, rust, and also has the ability to corrode in an acid, alkali, or salt-containing medium - that is, corrosion resistance. However, the degree of corrosion resistance varies with the chemical composition of the steel itself, the state of interaction, the conditions of use, and the type of environmental