电沉积Fe-Ni-Cr纳米晶镀层的制备及性能研究  

Preparation and Properties of Electrodeposited Nanocrystalline Fe-Ni-Cr Coating

作　　者：常季 陈吉[1] 宋见[1] 黄澳 刘元福[1] 

机构地区：[1]辽宁石油化工大学机械工程学院,抚顺113001

出　　处：《腐蚀科学与防护技术》2015年第6期581-584,共4页Corrosion Science and Protection Technology

基　　金：辽宁省自然科学基金项目(201202127)资助

摘　　要：采用脉冲电沉积方法从Cr3＋溶液中制备Fe-Ni-Cr纳米晶合金镀层,利用SEM,EDS和XRD对Fe-Ni-Cr合金镀层的表面形貌、化学组成和晶粒结构进行观察;利用电化学工作站对镀层进行极化曲线测试并与传统的304不锈钢进行对比。结果表明：电沉积镀层为纳米晶,无裂纹,表面光亮,晶粒尺寸大多分布在10~40 nm之间,镀层主要元素成分含量Cr为25.52%,Fe为59.61%,Ni为6.55%,与传统304不锈钢相比,Fe-Ni-Cr纳米晶镀层在5%的H2SO4溶液的自腐蚀电位提高了近30 m V,自腐蚀电流密度降低了近1/8,维钝电流降低了近1/10。因此,Fe-Ni-Cr纳米晶合金镀层表现出更好的耐蚀性。Nanocrystalline Fe-Ni-Cr alloy coating was plated on brass from a bath containing triva- lent chromium plating solution by using pulsed electrodeposition method. Then the surface mor- phology, chemical composition and microstructure of the coating were characterized by means of SEM with EDS and XRD. The corrosion behavior of the coating in 5%H2SO4 solution was exam- ined by polarization curve measurements in comparison to the traditional 304 stainless steel. The re- sults showed that： the electrodeposited Fe-Ni-Cr coating was nanocrystalline with grain size in a range of 10-40 nm and a composition of 25.52% Cr, 59.61% Fe and 6.55% Ni. In 5%H2SO4 solu- tion the free corrosion potential increased nearly 30 mV, corrosion current density reduced by nearly 1/8 and passive current reduced by nearly one-tenth for the Fe-Ni-Cr alloy coating in comparison to 304 steel.

关 键 词：CR3+ FE-NI-CR 合金镀层 纳米晶 304不锈钢 

分 类 号：TG172[金属学及工艺—金属表面处理]