Directing against the leakage problem of brass tubes (HSn70-1B) in condenser of unit no.2 in one power plant

the material quality of brass tubes

the film and scale behavior on inner wall of the condensor

and the operating conditions of said condenser have been analysed.Research show that:(1) the continuous Cu2O protective film doesn't exist on the inner wall of condenser tubes;(2) the low flow velocity of cooling water make a great deal of deposit appeared on inner wall of said tubes

resulting in spot corrosion

leading to peforated leakage of the brass tubes.For this

it is recommended to adopt some measures

such as using circulating pump for the condenser

enhancing the flow velocity of cooling water in the condenser tubes to the required value of standard

ensuring the surface quality of brass tubes in condenser

etc..