阳极氧化
材料科学
腐蚀
硫酸
介电谱
合金
冶金
铈
电流密度
薄膜
化学工程
X射线光电子能谱
电化学
铝
纳米技术
电极
化学
物理化学
工程类
物理
量子力学
作者
R. del Olmo,Marta Mohedano,Peter Visser,Ángel Rodríguez,E. Matykina,R. Arrabal
标识
DOI:10.1016/j.jmrt.2021.09.117
摘要
Chromic acid anodizing (CAA) is still being used today for corrosion protection of fatigue-critical components in the aeronautic industry due to the lack of feasible alternatives. Ce-containing sulfuric acid anodizing (SAA) has been identified as a promising strategy for the development of alternatives to toxic CAA. This work explores thin sulfuric acid anodizing (TSAA) focusing on the following effects: (i) current density and voltage values; (ii) concentration of Ce(IV). Screening of the optimum combination in search of minimum thickness and the best corrosion resistance was performed using electrochemical impedance spectroscopy (EIS). Two Ce-containing anodic films were selected and further investigated in comparison with the inhibitor-free film in terms of morphology (FEG-SEM, TEM), composition (RBS), corrosion resistance (EIS, NSST), high-cycle fatigue and paint adhesion. The results indicate that the path to approach the CAA performance lies through thin (<1 μm) SAA-Ce films formed at low current density.
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