A film (11) which may be placed on a metallic substrate (12) to inhibit corrosion of the substrate when in a corrosive environment. The film (11) also inhibits corrosion at a defect area (18) in the film (11) when the substrate (12) is exposed in the presence of a corrosive environment. The film (11) includes dopants (26) which release from the film (11) when corrosion begins at a film defect. Therefore, the film not only inhibits corrosion where the film is undamaged, but also inhibits corrosion at the site of a defect in the film. Advantageously, the system does not lose its effectiveness over a given period of time if no defect occurs in the substrate (Fig. 1).
一种薄膜(11),可置于
金属基板(12)上,以抑制基板在腐蚀环境中的腐蚀。当基板(12)暴露在腐蚀性环境中时,薄膜(11)还能抑制薄膜(11)中缺陷区域(18)的腐蚀。薄膜 (11) 包括掺杂剂 (26),当薄膜缺陷处开始腐蚀时,这些掺杂剂会从薄膜 (11) 中释放出来。因此,薄膜不仅能抑制薄膜未损坏处的腐蚀,还能抑制薄膜缺陷处的腐蚀。更有利的是,如果基底没有出现缺陷,该系统在一定时间内也不会失去效果(图 1)。