Adsorption of Fe(NO₃)₃ onto Activated Nylon-6,6 as a Container and a Possible “Smart” Corrosion Inhibitor-containing System

Abstract

Nylon-6,6 exhibits chemical, thermal and mechanical properties which include resistance to chemical attack, electrical insulating properties and degradation resistance. As a possible container, it can be used to manufacture a new family of active hybrid materials, coatings and corrosion inhibitor-containing systems. The release of encapsulated corrosion inhibitors is triggered by the corrosion process itself, which prevents the spontaneous leakage of such inhibitor and provides a quick response to changes in the service environment. With this in mind, nylon-6,6 pellets were activated using either γ-irradiation or chemical attack in alkaline solution. Better pore formation was achieved employing the latter method, with such pores being filled with adsorbed ferric nitrates. Electrochemical tests were undertaken to demonstrate the performance of the "smart" nature of the corrosion inhibitor system formed.

Characterization of a “Smart” Hybrid Varnish Electrospun Nylon Benzotriazole Copper Corrosion Protection Coating

“…Inhibitors are compounds capable of diminishing metal corrosion, even at very low concentrations in aggressive media. They change the electrochemical reaction kinetics producing corrosion, and the rate is significantly slowed down [11][12][13][14][15][16]. Corrosion processes include, in most cases, water molecules, and inhibitors are used in aqueous systems and in atmospheric corrosion protection.…”

Smart Protection of Polymer-Inhibitor Doped Systems

“…23 The detailed procedure has been reported elsewhere. 23 The formation of seals on the ends of the activated polymer is based on the reaction between the inhibitor loaded and the transition Fe metal ions that brings insoluble complexes of ferric nitrate distributed at the ends of the smart system acting as seals or stoppers, forming in this way the smart system. Activated nylon 6,6 pellets are immersed in cycles to achieve maximum particles weight gain by the presence of the inhibitor.…”

“…Another novel and seldom reported 22,23 approach is to use polymer nylon pellets or electrospun fibers and its properties as storage/carriers in combination with inhibitors and conventional coatings as a possible corrosion protection smart coating system.…”

Fabrication of Halloysite nanocontainers and their compatibility with epoxy coating for anti-corrosion performance

“…Development of novel materials for containment and controllable release of corrosion inhibitors has attracted much attention. [15][16][17][18] Halloysite (Al 2 Si 2 O 5 (OH) 4 •nH 2 O), an economic clay material that can be mined as a raw mineral, is a two-layered 1:1 aluminosilicate, which exhibits a range of morphologies. One predominant form is a hollow tubular structure with a very small inner diameter in the sub-micron range.…”