The effect of solid-solution-treated temperature 1050-1150℃ on structure and corrosion resistance in artificial seawater of maraging steel 00Cr13Ni7Co5Mo4W has been studied by analysis on microstructure

using potentiodynamic polarization curves and uniform corrosion immersion testing. Results show that the solid-solution-treated temperature influences uniformity of structure and grain size of the maraging stainless steel

and then influences the pitting corrosion resistance of steel ； the suitable solid-solution-treated temperature of the maraging stainless steel 00Cr13Ni7Co5Mo4W is 1100 °C

and the annual corrosion rate of the maraging stainless steel 00Cr13Ni7Co5Mo4W solid-solution-treated at 1100℃ for 1 h is only 1.09μm/a

and the breakdown voltage is 300 mV.