Experiment al evaluat ion of silic a nanoco ntainers and smart coatings for active corrosion p rotection of alumin um alloy

The development of active co rrosion protection syst ems for metallic substrates is an iss ue of prime importance for many industrial applications. Different types of ino rganic corrosion inhibitors include chromates, phosphates, molybdates, and nitr ites being used in different media [۱]. One of the main disadvantages of inorganic inhibitors is their toxi city; for example, chromates are pro ven to cause several diseases, incl uding cancer, and are r ecently forbidden for common usage [۲]. Different inhibit or encapsul ation techni ques have been investi gated, including polyelectrolyte, sol-gel nanoparticles, nan otubes, and other metho ds [۲, ۳]. In this research work, a novel technique was used to inves tigate the p rotection of ۲۰۲۴ alum inum alloy against corrosion with self-healing ability composed of paint films doped with nanocontainers t hat release entrapped corrosion inhibitor by corrosion process. Silica nanoparticles covered laye r-by-layer with surfac tant layers and layers of inhibitor, salicylaldoxime (S AL) were randomly introduced int o the paint films.

کلیدواژه ها:

Corrosion Protection ، Nanocapsules ، Coatings ، AA ۲۰۲۴