摘要
在富铁电解液体系中采用复配稳定剂和添加剂,增强了镀液的稳定性,降低了镀层内应力;并讨论了金属离子、氯离子、电流密度、温度及pH值等因素对合金箔组成的影响,得到了制备富铁Fe-Ni合金箔的最佳镀液组成及工艺条件.通过实验确定当阴阳极比为1∶2时,镍铁联合阳极配比为1.6∶1.采用SEM、EDS及XRD分析了富铁Fe-Ni合金箔的形貌及结构:合金箔晶粒细致,尺寸均匀,结构紧密,表面光滑平整,无缺陷,晶粒结构为(111),(200),(311)及(222)织构并表现为较强的(111)择优取向.阳极极化曲线测试表明:合金箔在10%的硫酸溶液、10%的氢氧化钠溶液、3.5%的氯化钠溶液中,表现出优异的耐腐蚀性能.
An electrodeposition technique of iron-rich Fe-Ni alloy foil from sulfate-chloride electrolyte is introduced. The effects of electrolyte constituents （ metal ion and Cl^- ion concentration in solution ）, pH, current density and temperature on the composition of alloy foil are investigated. The optimal electrodeposition process has been determined. The ratio of anode area of Ni to Fe is 1.6 ： 1 under the condition that the area ratio of cathode to anode is 1 ： 2. The SEM and EDS results show that the alloy foil is uniform and dense with delicate grains, and the surface appearance is metallic bright and smooth, exhibiting pinhol and cracking-free. The results of XRD analysis show that the formed invar alloy is of crystalline with preferential texture of （111）, （200）, （311） and （222）. Anodic polarization curve displays that the alloy foil shows excellent corrosion resistance in 10% H2SO4, 10 % NaOH and 3.5 % NaCl solution.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2006年第1期32-36,共5页
Corrosion Science and Protection Technology
基金
湖南省教育厅自然科学研究项目(2004C255)
关键词
富铁Fe—Ni合金
电沉积
合金箔
微观结构
腐蚀性能
alloy foil
electrodeposition
iron-rich Fe-Ni alloy
microstructure
corrosion resistance
