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首页> 外文期刊>Journal of Materials Science >Influence of coating on short steel fiber reinforcements on corrosion behavior of aluminium base short steel fiber reinforced composites
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Influence of coating on short steel fiber reinforcements on corrosion behavior of aluminium base short steel fiber reinforced composites

机译：钢短纤维增强涂层对铝基短钢纤维增强复合材料腐蚀行为的影响

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摘要

Steel fiber reinforced aluminium composites are attractive materials of high specific strength but exhibit poor resistance against electrochemical corrosion. The study discusses the electrochemical corrosion behavior of uncoated, copper and nickel coated short steel fiber reinforced aluminium and Al-2Mg matrix composites in 1 (N) NaCl solution. Galvanic corrosion between the steel fiber and aluminium governs the corrosion behavior of these composites. It has been observed that open circuit potential (OCP) is shifted to more negative side with copper coating on the fibers and to the more positive side on coating the fibers with nickel. Compared to the uncoated fiber higher corrosion current density indicates corrosion rate was observed for the copper coated fiber reinforced composites where as a lower current density was noted for the nickel coated fiber reinforced composites was observed. Addition of 2 wt% magnesium to aluminium alloy matrix increased the corrosion current density. The corrosion mechanism in these composites is dominated by galvanic cell formation that is evident from the dissolution of Al matrix near the peripheral region of steel fibers.
机译：钢纤维增强的铝复合材料是具有高比强度的有吸引力的材料，但对电化学腐蚀的耐受性较差。该研究讨论了在1（N）NaCl溶液中未涂覆，铜和镍涂覆的短钢纤维增强铝和Al-2Mg基复合材料的电化学腐蚀行为。钢纤维和铝之间的电偶腐蚀决定了这些复合材料的腐蚀行为。已经观察到，在纤维上镀有铜时，开路电势（OCP）移向更负的一侧，而在用镍包被纤维时，移向更正的一侧。与未涂覆的纤维相比，较高的腐蚀电流密度表明对铜涂覆的纤维增强复合材料观察到腐蚀速率，而对于镍涂覆的纤维增强复合材料则观察到较低的电流密度。在铝合金基体中添加2 wt％的镁会增加腐蚀电流密度。这些复合材料的腐蚀机理主要由原电池形成，从铝纤维在钢纤维外围区域附近的溶解可以明显看出。

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