摘要
采用室内周浸试验研究了1050A铝合金在模拟海洋大气环境的腐蚀行为,采用电化学阻抗谱、失重法、扫描电镜(SEM)、X射线衍射(XRD)和能谱(EDS)等方法研究了腐蚀产物表面形貌、结构和组成。结果表明,随着腐蚀的进行,腐蚀产物增多、失重增加、阻抗值逐渐减小。腐蚀产物主要以团状和块状的形式存在,并不断向外延伸扩大,呈现不均匀的凹凸形貌;腐蚀产物主要有铝的氯化物、Al2O3,Al(OH)3和AlO(OH)等;电化学阻抗谱拟合结果显示,腐蚀速率先增加后降低。
The corrosion behavior of aluminum alloy 1050A in marine atmospheric environment was studied by cyclic wet-dry immersion test. Electrochemical impedance spectroscopy （EIS）, weight loss method, scanning electron microscopy （SEM）, X-ray diffraction （XRD） and energy dispersive spectroscopy （EDS） were employed to observe and analyze the surface morphology, structure and composition of the corrosion products of aluminum alloy 1050A in simulated marine atmosphere. The results showed that the corrosion product increased, mass loss increased and the resistance value gradually decreased with testing time prolonging. Surface observation revealed that the corrosion product was accidented and agglomerated. The corrosion products mainly include aluminum chloride, A1203, A1 （OH）3 and A10（OH）. Electrochemical impedance spectroscopy fitting results show that the corrosion rate first increased and then decreased.
出处
《腐蚀与防护》
CAS
北大核心
2014年第1期33-36,共4页
Corrosion & Protection
关键词
1050A铝合金
腐蚀
海洋大气
电化学阻抗谱
aluminum alloy 1050A
corrosion
marine atmosphere
electrochemical impedance spectroscopy
