基于电沉积水热法的钢表面Mg-Al-NO_(3)-LDH膜原位生长制备及沉积电位优化

In Situ Growth and Deposition Potential Optimization of Mg-Al-NO_(3)-LDH Film on Steel Surface Based on Electrodeposition Hydrothermal Method

为提升建筑用钢的耐久性,通过电沉积法在钢表面形成层状双氢氧化物(LDH)晶核,再通过水热反应让LDH晶核生长成形成致密的Mg-Al-NO_(3)-LDH膜,分析了电沉积电位对钢基底表面LDH膜生长的影响,讨论了LDH膜的形成机理.结果表明,当电沉积电位为-1.4 V(相对于Ag/AgCl电极)时,LDH纳米片聚集堆叠致密,形成的LDH膜结构最为密实,实现了对钢基底良好的锈蚀防护.

To improve the durability of construction steel,the layered double hydroxide(LDH)crystal nucleus was formed in the steel surface through electrical deposition method.The LDH continued to grow into a dense Mg-Al-NO_(3)-LDH film through water heat reaction.The effect of the electric sediment voltage on the growth of the LDH film on the surface was analyzed and the mechanism of LDH membrane was discussed.The results show that when the electric precipitation voltage is-1.4 V,LDH nanoparticles are concentrated and stacked together and LDH thin film shape is the densest.A good anti-corrosion protection function on the base of steel is obtained.