摘要
在钢铁基体上,采用由400g/L氯化亚铁、3.2g/L抗坏血酸、2g/L苷氨酸和6.4mL/L氟硼酸组成的稳定镀液,研究了电流波形及电流密度的变化对铁电镀层的沉积速率、外观、显微硬度和表面形貌的影响。得到用于工件修复功能的最佳电流波形为单脉冲电流,其导通时间为0.1ms,周期为1ms,工作时间为100ms,间歇时间为900ms,平均电流密度为5.5A/dm2时,所得镀层为细致的微晶组织,有不规则的微裂纹,其显微硬度达到679HV,沉积速率与直流时相近。
The effects of current waveform and current density on the deposition rate, appearance, microhardness and surface morphology of Fe coating electroplated from a stable bath containing FeCl2 400 g/L, ascorbic acid 3.2 g/L, glycine 2 g/L and fluoroboric acid 6.4 mL/L on steel substrate were studied. Single pulse current is the most suitable waveform for repairing parts. The Fe coating prepared with single pulse current at pulse on-time 0.1 ms, period 1 ms, working time 100 ms, intermittent time 900 ms and average current density 5.5 A/dm2 features fine microcrystalline structure with irregular micro-cracks, microhardness 679 HV, and similar deposition rate as the Fe coating prepared with direct current.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2010年第9期5-8,共4页
Electroplating & Finishing
关键词
电镀铁
电流波形
沉积速率
显微硬度
表面形貌
iron electroplating
current waveform
deposition rate
microhardness
surface morphology
