The corrosion environment of dismantling joints includes 4 situations: dry corrosion, wet corrosion, high temperature oxidation corrosion, anhydrous organic liquid and gas corrosion.

1. Dry corrosion: dismantling joints corroded in air drying gas above dew point, it is easy to have thin surface corrosion products and make dismantling joint metal face lose tarnish.

2. High temperature oxidation corrosion: metal face corroded in high temperature gas and generate thick oxide skin. Thermal stress and mechanical stress can cause oxide skin peeling off.

3. Wet corrosion: dismantling joints corroded in wet environment and water-bearing medium. Wet corrosion includes atmospheric corrosion, soil corrosion, microbiological corrosion, acid-base and salt solution corrosion, industrial water corrosion and high temperature and pressure corrosion.

4. Anhydrous organic liquid and gas corrosion: dismantling joints corroded in halogenated hydrocarbon and alcohol. This kind of corrosion medium belongs to non electrolyte, whether liquid or gas, their corrosion reaction is the same.

The analysis of the corrosion environment of dismantling joints help builders to understand the using environment of dismantling joints, in this way to choose suitable dismantling joints.