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本文通过18-8-0.5Ti不锈钢,3RE60双相钢,及单金属Fe,Ni,Cr,Mo,Ti等在沸腾42％MgCL_2溶液中的电化学测量和表面俄歇能谱分析,证实(1)在沸腾42％MgCl_2溶液中,不锈钢表面形成了钝化膜而不是Ni的富集膜(2)铬在钝化膜内层的富集反映了合金化的铬和单质金属铬的电化学行为不同,显然,在沸腾42％MgCl_2中合金中的含铬氧化物钝化膜比单质金属铬的氧化物膜更具保护性。
In this paper, 18-8-0.5Ti stainless steel, 3RE60 dual-phase steel, and single metal Fe, Ni, Cr, Mo, Ti, etc. in the boiling 42% MgCl_2 solution electrochemical measurement and surface Auger spectroscopy confirmed ) In 42% MgCl 2 solution, the stainless steel surface formed a passivation film instead of Ni-rich film. (2) The enrichment of chromium in the passivation film reflects the electrochemical behavior of the alloyed chromium and elemental chromium , It is clear that the chromium-containing oxide passivation film in the alloy in boiling 42% MgCl 2 is more protective than the oxide film of elemental chromium.