NaCl沉积与SO2协同作用对铝合金初期腐蚀行为影响
Effect of NaCl Deposition and SO2 Synergistic on Aluminum Alloy Initial Corrosion Behavior
吕保民，裴和中
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作者单位：昆明理工大学材料科学与工程学院
中文关键字：7B04铝合金；初期腐蚀； 腐蚀机理
英文关键字：7B04 Aluminium Alloy；initial corrosion；corrosion mechanism
中文摘要：本文借助SEM，XRD及Kelvin探头等现代分析手段对铝合金初期腐蚀进行原位分析,得到NaCl和SO2污染对铝合金初期腐蚀的影响规律,并探讨其腐蚀机理。结果表明,在温度20℃、湿度85%条件下，SO2可诱发大气腐蚀，腐蚀形式主要表现为晶间腐蚀和部分点蚀。NaCl沉积与SO2的协同作用极大的加速了铝合金的腐蚀。
英文摘要：The initial stage corrosion of Aluminum Alloy was in-situ analyzed by SEM, XRD and Kelvin probe. The rule of soluble salt and SO2 pollution to the Aluminum Alloy initial corrosion was obtained. The corrosion mechanism was also discussed. The results show that at a temperature of 20°C, 85% humidity conditions, atmospheric corrosion can be induced by SO2. Corrosion was mainly expressed in the form of intergranular corrosion and pitting corrosion. Deposition of NaCl and SO2 synergy greatly accelerated the corrosion of Aluminium Alloys.