作　　者： ; ; ; (俞志东）;

机构地区： 广东石油化工学院

出　　处： 《表面技术》 2013年第1期35-38,共4页

摘　　要： 采用动电位极化曲线法,结合腐蚀后的表面微观形貌及EDS能谱分析,研究了MoO42-与Zn2+对AZ31镁合金在3.5%NaCl溶液中的协同缓蚀性能。结果表明:0.005 mol/L Zn2+与0.05 mol/L钼酸钠联合作用,可有效抑制镁合金在NaCl溶液中的腐蚀,Zn2+促进MoO42-在合金表面的吸附,缓蚀效果优于单一的钼酸盐缓蚀剂。缓蚀机制是:钼酸盐与Zn2+协同作用,使镁合金表面形成更为致密的钝化膜,从而抑制镁合金的腐蚀。 The inhibition performance and mechanism of molybdate in combination with Zn2~ as inhibitors for magnesium alloy were studied in 3.5 % NaC1 solution by using potentiodynamic polarization curves. The results show that the synergistic inhibition by 0.05 moL/L molybdate in combination with 0. 005 mol/L Zn2＋ demonstrates strong inhibition to the corrosion of AZ31 magnesium alloy exposed to NaC1 solution. The adsorption acting of MoO42is promoted on the alloy surface by Zn2~, what hold better resistance performance than that of single molybdate corrosion inhibitor. The mixture consisting of molybdate and Zn2＋ is an inhibitor through forming a compact protective layer that covered the magnesium alloy surface.

关 键 词： 镁合金 钼酸盐 离子 缓蚀作用

领　　域： [金属学及工艺] [金属学及工艺]