Polydopamine Nanomembranes as Adhesion Layers for Improved Corrosion Resistance in Low Carbon Steel

Abstract

Low-carbon steel is an important commodity material, but poor corrosion resistance has a strong impact on its service life, which leads to great loss in economic development. Polymer coatings serve as barrier layers that confer corrosion resistance. However, robust adhesion between steels and polymer films operating in complex fluids is challenging. This study evaluates the utility of adhesion layers composed of polydopamine, an organic film formed through simultaneous deposition, and polymerization in aqueous phases. Here, polydopamine serves as an intermediary adhesion layer between metallic substrates and polymer coatings. The composition, microstructure, and electrochemical properties of polydopamine nanomembranes are characterized. The impact of polydopamine nanomembranes on adhesion and supplementary corrosion resistance of polymer-based barrier layers is assessed using a functional assay. These results suggest that polydopaminebased nanomembranes can serve as effective adhesion-promoting intermediary layers that retard corrosion and prolong the service life of low-carbon steels in certain applications.

Polydopamine nanostructures as biomaterials for medical applications

“…Although this particular system is complex and the results largely empirical, it is clear that covalent conjugation across the metal-organic-metal interface in an important consideration while designing high performance adhesives. PDA therefore exhibits exceptional utility as a potential intermediary layer to functionalize surfaces and promote adhesion across inorganic-organic intefaces 42 .…”

Ultrathin and Flexible ANF/APP/PRGO Composite Films for High-Performance Electromagnetic Interference Shielding and Joule Heating

“…The C, N, and O elements are all distributed in the three layers, and the S element is concentrated in the APP layer, which is derived from PEDOT:PSS, as shown in Figure f–i. Due to the existence of the same components and the virtue of the adhesion of PDA, no obvious delamination phenomenon occurs. With a lightweight and a certain degree of flexibility, the composite film can be easily placed on plant leaves and wound on thin rods without integrity damage or layer shedding after unfolding, indicating the good combination between layers, as shown in Figure S6.…”

Preparation and characterization of polydopamine and n-butyl methacrylate copolymer coatings on titanium–nickel alloy stents

“…43,44 Consequently, PDA serves as an effective adhesion-promoting layer at the organicinorganic interface. 26 The presence of PDA on TiNi surface increases the concentration of polar groups, thereby enhancing the metal surface wettability. The hydroxyl group in PDA facilitates the formation of additional hydrogen bonds with oxygen and nitrogen atoms in PBMA-b-PVP, 45 leading to improved wettability of the metal surface and consequently, a larger contact area between the coating and substrate.…”

“…24 A unique characteristic of PDA is its gentle adhesion to various materials, and therefore polymer-metal junctions are strengthened through interactions with other polymers. 22,25,26 In this study, the block copolymer PBMA-b-PVP consisting of PBMA and four different chain lengths of PVP was synthesized by RAFT polymerization, and functionalized TiNi alloys with PDA. The effect of the adhesion of PBMA-b-PVP with different PVP chain lengths to the surfaces of TiNi alloys was investigated, as well as the stability of the PBMA-b-PVP in PBS solution.…”

“…24 A unique characteristic of PDA is its gentle adhesion to various materials, and therefore polymer–metal junctions are strengthened through interactions with other polymers. 22,25,26…”