Anti corrosion grade:

1. Indoor type:

Indoor moderate corrosion protection type: F1;

Indoor anti-corrosion type: F2.

2. Outdoor type:

Outdoor anti-corrosion type: W;

Outdoor moderate corrosion protection type: WF1;

Outdoor anti-corrosion type: WF2.

Corrosion prevention: Corrosion prevention refers to the use of various methods to protect metal objects that are prone to rusting, in order to extend their service life. Physical corrosion prevention, chemical corrosion prevention, electrochemical corrosion prevention, and other methods are usually used.