The corrosion behavior of generator stator metal material in simulated high humidity salt spray environment was studied

and a nitrogen-charging maintenance system for generator stator was developed

and industrial tests were carried out on a 100 megawatt unit. The results show that

the deposition of salt on the metal surface accelerated the corrosion of the metal material

and the removal of oxygen from the stator by nitrogen filling method can effectively inhibit the corrosion of the metal material. The nitrogen purity reached 98.8% after 41 h of nitrogen charging and the maintenance system was put into operation

and the relative humidity in the stator decreased to below 5% after the system ran for 113 h. During the test

the anti-corrosion effect of the related metal materials of the generator stator was good

and the disqualification of the insulation resistance of the generator stator was effectively improved.