The metallic engineering structures were commonly covered and protected by the anti-corrosion coatings. The early corrosion under the coatings and at the defects was concealed. Once the corrosion was visible to the naked eye, it indicated that the corrosion has developed seriously. Therefore, it was practical significant to detect the early corrosion of the metal under the coatings and at the defects. The formation of iron ions and anodic acidification were the characteristics of local corrosion process. Based on this fact, iron ions and protons responsive fluorescent on-off probes Rhodamine B Acylhydrazone (RBA) were prepared for the detection of corrosion. In the prepared supramolecules of RBA/LDHs, RBA intercalated and was loaded between layered double hydroxide (LDHs) to protect RBA from premature exposure to corrosive environment and fluorescence quenching. When corrosive Cl⁻ was presented, the RBA loaded by LDHs exchanged with Cl⁻ in corrosive environment, and RBA was released, and Cl⁻ intercalated and was loaded between layers of LDHs. Therefore, the response to corrosion factors and release of RBA were realized, and was accompanied by the capture of Cl⁻ and treatment of corrosion region. In the epoxy coatings, RBA/LDHs indicated the occurrence of corrosion and accurately locate the corrosion site and coating defects in form of fluorescence. Simultaneously, the sheet morphology and dispersion distribution of RBA/LDHs enhanced the shielding performance of the coatings.

金属工程结构通常被防腐蚀涂层覆盖并保护。隐藏了涂层下和缺陷处的早期腐蚀。肉眼可见腐蚀后，表明腐蚀已严重发展。因此，检测金属在涂层下和缺陷处的早期腐蚀具有实际意义。铁离子的形成和阳极酸化是局部腐蚀过程的特征。基于这一事实，制备了铁离子和质子响应性荧光开-关探针若丹明B酰hydr（RBA）用于检测腐蚀。在制备的RBA / LDHs超分子中，RBA插入并装载在层状双氢氧化物（LDH）之间，以保护RBA避免过早暴露于腐蚀性环境和荧光猝灭。腐蚀性Cl时^-被提出时，RBA通过装载有Cl交换水滑石^-在腐蚀性的环境中，和RBA被释放，和Cl ^-插和水滑石的层间被装载。因此，为了腐蚀因素和RBA的释放的响应分别实现，并伴随着Cl组成的捕获^-和治疗腐蚀区域。在环氧涂料中，RBA / LDHs指示腐蚀的发生，并以荧光形式准确地定位腐蚀部位和涂料缺陷。同时，RBA / LDHs的表面形貌和分散分布增强了涂层的屏蔽性能。