The pitting corrosion behaviors between the constituent phases in F53 super duplex stainless steel (SDSS) in acidified chloride environments were investigated using a critical pitting corrosion temperature test, a potentiodynamic anodic polarization test, and the microstructure analyses through a SEM-EDS and a SAM. As the solution annealing temperature decreased from $1150^{circ}C$ to $1050^{circ}C$, the ${gamma}$-phase fraction increased whereas the ${alpha}$-phase fraction decreased. The pitting potential and the critical pitting temperature increased with a decrease of solution annealing temperature, thereby increasing the resistance to pitting corrosion. The pitting corrosion of the SDSS was selectively initiated at the ${alpha}$-phases because the PREN (pitting resistance equivalent number, PREN = %Cr+3.3%Mo+30%N) value of the ${gamma}$-phase is much larger than that of the ${alpha}$-phase, irrespective of the solution annealing temperature. The pitting corrosion was finally propagated from the ${alpha}$-phase to the ${gamma}$-phase. The decrease of solution annealing temperature enhanced the resistance to pitting corrosion greatly in acidified chloride environments due to a decrease of PREN difference between the ${gamma}$-phase and the ${alpha}$-phase, that is, a decrease of $PREN{gamma}$ by dilution of N in ${gamma}$-phase with an increase in the ${gamma}$-phase volume fraction and an increase of $PREN{alpha}$ by enrichment of Cr and Mo in the ${alpha}$-phase with a decrease in the ${alpha}$-phase volume fraction.