电泳沉积
壳聚糖
复合数
腐蚀
微观结构
钼
化学工程
钼酸盐
材料科学
涂层
钼酸钠
复合材料
冶金
工程类
作者
José Anderson Machado Oliveira,Renato Alexandre Costa de Santana,Alcides de Oliveira Wanderley Neto
标识
DOI:10.1016/j.carbpol.2020.117382
摘要
In this paper, the effect of the electric field on the properties of a new chitosan-molybdenum (Chit-Mo) composite coating obtained by electrophoretic deposition (EPD) was investigated. The composite coatings obtained showed different morphologies depending on the conditions used during the deposition process. Chemical composition results and microstructure analysis showed homogeneous distribution of molybdenum in a chitosan matrix. Corrosion test results showed that the Chit-Mo composite coatings can increase corrosion resistance of 1020 steel in NaCl medium (3.5 %). The coatings obtained at 5 V, pH 5.5, and using a low concentration of reagents (suspension 1: chitosan 0.5 g/L and 1 mM sodium molybdate) reached an inhibition efficiency of up to 76.7 %. Therefore, the results obtained in this work prove the achievement of a new class of chitosan-based composite materials with potential application in the protection of metal structures against corrosion.
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