INVESTIGATION ON INTERRELATION OF ACCELERATED CORROSION TESTING AND ATMOSPHERIC EXPOSURE OF ZINC

By means of accelerated corrosion tests and electrochemical measurements, the influence of NaHSO 3, NaCl or NaHSO 3 + NaCl on corrosion behavior of zinc was studied. Its corrosion products were analysed by XRD, and corrosion mechanism of zinc with emphasis on the mixed medium (NaHSO 3 + NaCl) was discussed. The corrosion process of zinc in Shenyang atmosphere could be simulated by intermittent fogging spraying testing with 10 -1 mol/L NaHSO 3 + 10 -2 mol/L NaCl. The relationship between weight loss of zinc and test duration could be described by a formula Δ w=A+Bt.