Corrosion Characteristic of Steam Turbine Blade 1Cr13 Steel in Simulated Initial-condensate Water

Corrosion behavior of turbine blade 1Cr13 steel in simulated initial condensate water with SO₄^2-, Cl^-, NO₃^-, F^- and other impurity anions was studied by electrochemical testing and microscopic characterization (SEM, EDS, XRD and so on). The results showed that the acid corrosion of 1Cr13 steel was not caused by low molecular weight organic acids alone, but rather as a result of the combined effect of impurity anions and low molecular weight organic acid. The degree of corrosion had a great relationship with the type and concentration of anions. Therefore, in order to guarantee the safe and reliable operation of the turbine, it is necessary to improve the quality of raw water, timely detect the content of impurity ion on-line, develop the appropriate standards.