Zinc molybdate (ZM) is a safer anticorrosive additive for cooling systems when compared with chromates and lead salts, due to its insolubility in aqueous media. For most molybdate pigments, their molybdate anion (${\text{MoO}}_4^{-2}$) acts as an anionic inhibitor and its passivation capacity is comparable with chromate anion (${\text{CrO}}_4^{-2}$). To alleviate the environmental concerns involving chromates-based industrial protective coatings, we have proposed new alternative in this work. We have synthesized ZM nanocrystal via ultrasound-assisted process and encapsulated them within an epoxy/PDMS coating towards corrosion protection. The surface morphology and mechanical properties of these ZM doped epoxy/PDMS nanocomposite coatings is exhaustively discussed to show the effect of ZM content on protective properties. The presence of ZM nanocrystals significantly contributed to the corrosion barrier performance of the coating while the amount of ZM nanocrystals needed to prepare an epoxy coating with optimum barrier performance was established. Beyond 2 wt.% ZM concentration, the siloxane-structured epoxy coating network became saturated with ZM pigments. This further broadened inherent pores channels, leading to the percolation of corrosion chloride ions through the coating. SEM evidence has revealed proof of surface delamination on ZM3 coating. A model mechanism of corrosion resistance has been proposed for ZM doped epoxy/PDMS nanocomposite coatings from exhaustive surface morphological evidence. This coating matrix may have emerging applications in cooling systems as anticorrosive surface paints as well as create an avenue for environmental corrosion remediation.

与铬酸盐和铅盐相比，钼酸锌（ZM）是一种更安全的冷却系统防腐添加剂，因为它在水性介质中不溶。对于大多数钼酸盐颜料，其钼酸盐阴离子（${\text{O}}_4^{--\mathrm{2个}}$）作为阴离子抑制剂，其钝化能力与铬酸根阴离子（${\text{铬}}_4^{--\mathrm{2个}}$）。为了减轻涉及铬酸盐基工业防护涂料的环境问题，我们在这项工作中提出了新的替代方法。我们已经通过超声辅助工艺合成了ZM纳米晶体，并将其封装在环氧/ PDMS涂层中以达到防腐蚀的目的。详尽讨论了这些ZM掺杂的环氧/ PDMS纳米复合涂料的表面形态和机械性能，以显示ZM含量对保护性能的影响。ZM纳米晶体的存在显着促进了涂层的腐蚀阻隔性能，同时确立了制备具有最佳阻隔性能的环氧涂料所需的ZM纳米晶体的数量。超过2重量％的ZM浓度，硅氧烷结构的环氧涂料网络变得被ZM颜料饱和。这进一步加宽了固有的孔道，导致腐蚀氯化物离子渗透穿过涂层。SEM证据表明ZM3涂层表面分层。根据详尽的表面形态学证据，提出了ZM掺杂的环氧/ PDMS纳米复合涂料的耐腐蚀模型机制。这种涂料基质可能会在冷却系统中作为防腐表面涂料出现新兴应用，并为环境腐蚀的修复创造一条途径。