Papers by Author: De Sheng Han

Abstract: By analyzing morphology, weight gain, pitting depth, potential and AC impendence in corrosion course, initial pitting behavior of LY12 aluminum alloy in simulated marine atmosphere was studied. Results indicated initial pitting of LY12 was affected much by Cl- sedimentation and atmosphere humidity, little by temperature below 35°C. Weight gain and pitting depth increased with rising of Clsedimentation quantity, humidity and temperature. Correlation of weight gain and time fitted Model Boltzman. In initial pitting course of LY12, open circuit potential changed little and Nyquist graph had the characteristic of adsorbent resist system.

Abstract: Influence of SO2 concentration on initial corrosion of aluminum was studied in simulated marine atmosphere. Variation of initial corrosion morphology, relation between weight gain and time in the course of initial corrosion, corrosion speed (token with maximum pitting depth and weight gain) were analyzed and discussed. Primary results is list below: In marine atmosphere, SO2 sedimentation above 0.1 mg/100cm2 can accelerate Al pitting with low Cl- sedimentation. Both corrosion weight gain and pitting depth increase obviously. For pitting surface of LY12 with SO2 and Cl- sedimentation, corrosion potential change little, Nyquist Graph was single arc of capacitance resist with retractile real part, Rr can’t reflect corrosion degree.