Transport of active species (i.e., ions) leaching from pigment particles incorporated in a polymer matrix is the main mechanism behind the anticorrosive performance of protective coatings. Understanding this mechanism is necessary for the effective design of the systems utilizing pigments less toxic than the most efficient chromate salts. It was demonstrated that anticorrosive pigment particles can themselves facilitate the transport of active species via the pathways formed after pigment leaching from a coating. It was also suggested that other paint components, e.g., certain additives, pigments, and fillers can be involved in the formation of transport pathways. Investigation of the possible influence of inert pigment (TiO₂) on creating the pathways for chromate ion transport in polymer coatings was the primary objective of this work. In an experiment mimicking the transport of pigment species (i.e., chromate ions), a model epoxy coating containing particles of a single pigment (TiO₂) was exposed to a chromate solution (aqueous, or with the addition of acetone as a polymer swelling agent). It was shown that the chromate ions can be transported in the epoxy film preferentially via the TiO₂ particles/polymer matrix interface.

从掺入聚合物基体中的颜料颗粒中浸出的活性物质（即离子）的运输是保护涂层防腐蚀性能的主要机理。为了有效设计使用毒性比最有效铬酸盐低的颜料的系统，必须了解这种机理。已经证明，防腐颜料颗粒本身可以通过从涂料中浸出颜料后形成的途径，促进活性物质的运输。还建议其他涂料组分，例如某些添加剂，颜料和填料，可能参与运输途径的形成。研究惰性颜料（TiO ₂）创造聚合物涂层中铬酸盐离子传输的途径是这项工作的主要目标。在模拟颜料种类（即铬酸根离子）传输的实验中，将包含单个颜料（TiO ₂）颗粒的模型环氧涂料暴露于铬酸溶液（水溶液或加入丙酮作为聚合物溶胀剂） ）。结果表明，铬酸根离子可以优先通过TiO ₂颗粒/聚合物基质界面在环氧膜中传输。