P. Ikubanni, M. Oki, A. A. Adeleke, E. Ajisegiri, M. Fajobi
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引用次数: 0
摘要
研究了碳化硅（SiC）和棕榈仁壳灰（PKSA）颗粒增强6063铝合金在不同混合比下的动电位极化。采用双搅拌铸造法生产混杂增强复合材料。基体合金中增强体的存在充当了腐蚀引发的活性位点。因此，观察到点蚀。在1.0 M H2SO4中24小时获得的Ecorr和Icorr的值范围分别在-627.74和-644.46 mV之间和423.81和860.23µA/cm2之间。在1.0 M H2SO4中72小时时，Ecorr值范围为-654至-697.22 mV，Icorr范围为1075.65至3057.16µA/cm2。样品的相对耐腐蚀性取决于在样品表面形成的薄氧化膜。
CORROSION BEHAVIOR OF Al/SiC/PKSA HYBRID COMPOSITES IN 1.0 M H2SO4 ENVIRONMENT USING POTENTIODYNAMIC POLARIZATION TECHNIQUE
The potentiodynamic polarization of aluminium 6063 alloy reinforced with silicon carbide (SiC) and palm kernel shell ash (PKSA) particulates at various mixing ratios were investigated. Double stir casting method was adopted for the production of the hybrid reinforced composites. The existence of the reinforcements within the matrix alloy acted as active sites for corrosion initiation. Hence, pitting corrosion was observed. The range of values for Ecorr and Icorr obtained at 24 h in 1.0 M H2SO4 were between -627.74 and -644.46 mV, and between 423.81 and 860.23 µA/cm2, respectively. The Ecorr values ranged from -654 to -697.22 mV, and the Icorr ranged from 1075.65 to 3057.16 µA/cm2 at 72 h in 1.0 M H2SO4. The relative resistance to corrosion of the samples is dependent on the thin oxide film formed on the surface of the samples.
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