Corrosion Behavior of Welded Partitions of 3003 Al-alloy Used for Radiators of High-speed Train
The corrosion behavior of welded partitions of 3003 Al-alloy,used for radiators of high-speed train,in artificial solution of settling dust,which aims to simulate the synergistic ation of the settling dusts and rains on the partitions in the real service,was studied by means of immersion test,polarization curve measurement,X-ray fluorescence(XRF),scanning electron microscopy(SEM),and electrochemi-cal impedance spectroscopy(EIS).Meanwhile,the relevant prediction model for the corrosion depth of welded partitions was established.The results show that,the pitting corrosion is dominant at the initial stage of corrosion,and then gradually evolves into intergranular corrosion.The main corrosion products of welded partitions are Al(OH)3 and AlCl3.In comparison with those of the as received ones,the corro-sion potential of welded partitions after immersion for 180 d decreases by 24.5％and the corrosion cur-rent density increases by 156.7％.A prediction model for the maximum corrosion depth of welded parti-tions was established based on data of the immersion test results and the measured corrosion depth of the very welded partitions after 8 a of live vehicle service.
3003 Al-alloycorrosion-resistancecorrosion behaviorcorrosion modelcorrosion depth prediction model
NETL
NSTL
万方数据
