The safety and economy of the waste heat boiler of the gas turbine power station will be undermined because of the sulfuric acid dew point corrosion.To figure out the exact mechanism,by taking account of the field operating conditions,the distribution value of the condensation acid concentration of the waste heat boiler of the gas turbine power station is calculated according to the thermodynamic principle.Based on this,the dew point corrosion simulation experiments of 20G steel used for the waste heat boiler is carried out.The electrochemical ...