Inhibition of Corrosion Reactions Using Micelles Based Material Embedded in Coating
Abstract
Anti-corrosion coatings are widely used across the DOD (Department of Defense) and in industry, and the global demand is projected to be more than $23.2 Bn. by 2022. The market is driven by increased losses because of corrosion across a spectrum of industries, such as infrastructure, power, shipping, and defense. DOD and the commercial market are continuously fighting to address the problem and seek new products and new initiatives aimed at developing new variants of corrosion-resistant coatings with better performance.Materials prone to corrosion are widely used in DOD applications such as naval ships and arms ammunition, and there are massive costs associated with the damages because of corrosion. Metallic and organic coatings are commonly used to protect surfaces from corrosion. However, most of the conventional fillers dispersed in organic coatings provide only passive resistance tocorrosion by creating a barrier for incoming corrodent molecules. Once corrodent molecules overcome that barrier and the corrosion reaction starts, it is almost impossible to stop corrosion propagation on the metal surface.Here we propose an effective approach to improve the efficacy of in-situ corrosion inhibition by utilizing a pH-sensitive polymeric micellar system for delivering corrosion inhibitors. The copolymers with a reversible protonation deprotonation core can be used to synthesize the pH-sensitive polymeric micelles for timely release of corrosion inhibitors. These micellar systemscan be loaded with corrosion inhibitors and triggered to release them as pH changes because of the corrosion reaction. The pH-sensitive strategy of the polymeric micelles facilitates the localized delivery of a specific corrosion inhibitor at the initiation of the corrosion reaction, representing a novel, effective, and promising platform for corrosion protection. In this proposed project, we will develop a micelle-based material to be used as transporters of corrosion inhibitors that can be added in current coating systems used by the Navy. These micelle-based molecules will deliver the corrosion inhibitors at the inception of the corrosion reaction, thereby inhibiting the corrosion reaction and providing a robust solution for corrosion prevention.By the end of le-based fillers containing inhibitors for use in coatings applied on the naval ships, (3) assess the efficacy of these fillers in corrosion prevention.Corrosion can cause catastrophic health damage to the structure of ships and weaponry, resulting in the lower readiness level of naval operations. The inhibition of the corrosion reaction is defined by its inability to progress and not causing further damage once inhibited. The time available for inhibition of reaction primarily depends on the corrosion location on the structure and its nature. The removal of rust and preparing the surface for further use involves physical removal and coating. Thus, inhibiting corrosion at its inception can provide longer structure life and more time for the Navy to solve corrosion problems before they reach critical points. The salient feature of our proposed innovation is the development of the pH-sensitive micelles that will release inhibitors at the inception of corrosion reactions. Corrosion is a pH-sensitive reaction and can be either basic or acidic. We propose to develop a solution for each pH environment and use them in combination. Once the efficacy of technology is proven, it will be scaled up and optimized to military specs. It will then eventually be placed on an actual DOD product platform where it could be scaled from the Navy to the other branches of the DOD.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 29, 2020
- Source ID
- N000142012351
Entities
People
- Pranav Nawani
Organizations
- Office of Naval Research
- United States Navy
- Washington State University