Preparation and characteristics of the sulfonated chitosan derivatives electrodeposited onto 316l stainless steel surface

Abstract

In order to ameliorate the properties of corrosion resistance and achieve applications in anti-biofouling of 316L stainless steel (SS), a sulfated derivative of chitosan was deposited onto stainless steel surface by an electrochemical method. In detail, chitosan-catechol (CS-CT) was synthesised in the hydrochloric acid solution by the Mannich reaction and then electrodeposited on the surface of the polished 316L stainless steel. The chitosan-catechol deposited SS sample was further modified with maleic anhydride and sulfite. The grafting progress was monitored by FTIR, UV spectrophotometer and X-ray photoelectron spectroscopy. Hydrophilicity and corrosion resistance of modified SS were characterized by water contact angle measurements, Tafel curves and electrochemical impedance spectroscopy. The morphology of the SS surface before and after the modification was investigated by atomic force microscopy and scanning electron microscope. Further, the anti-biofouling performance in terms of the anti-adsorption protein and anti-bacteria effects of all modified SS samples were estimated, and the modified 316L exhibits the capability of lower protein adsorption and improved antibacterial effect.

Schiff Bases of 2,5‐Thiophenedicarboxaldehyde as Corrosion Inhibitor for Stainless Steel under Acidic Medium: Experimental, Quantum Chemical and Surface Studies

“…In detail, the electrochemical corrosion in stainless steel material is a chemical reaction starts with transfer of electrons from zero valent Fe atom of steel to an external electron acceptor, leading to the release of the metal ions into the encompassing medium and degradation of the metal . The inhibitive behaviour of organic molecules depends on the electron clouds around the donor atoms, higher the electron clouds at the donor atom, more the efficiency as inhibitor.…”

Understanding the Mechanism of Cs Accumulation on Stainless Steel Suspended in Nuclear High-Level Liquid Waste

“…In the present study, the dissolution of Fe and Ni from the base alloy was observed from ICP-OES analysis, resulting in corrosion of metal started through the transfer of electrons from Fe and Ni to an external electron receiver, hence the release of metal into the solution and degradation of the metal surface. 34 The behavior of any suitable inhibitor strongly depends on the availability of the electrons from donor atoms. If the electron density of the donor atom is high, then the efficiency of the inhibitor increases.…”

An Overview of Serum Albumin Interactions with Biomedical Alloys

“…The data presented in this figure were selected based on the literature that contains a direct proof of the observed phenomena, while speculative references were excluded. Regarding the protein adsorption phenomena, for instance, evidences obtained with EIS, CV, QCM [24,29,39,[42][43][44]46,50,[67][68][69][70] and surface analysis techniques [26,29,30,34,44,46,67] were considered as sufficient. Concerning protein-metal binding phenomena, literature containing ICP-OES and AAS [26,27,51,54] evidences was considered.…”

“…Adsorption of proteins in biological fluids is one of the initial steps that affects the biocompatibility of the implants inside a human body [66]. BSA adsorption was observed and corroborated either by in-situ electrochemical and/or ex-situ surface analysis techniques by different authors [24,26,29,30,34,39,[42][43][44]46,50,[67][68][69][70]. Indeed, several reviews dedicated to adsorption phenomena involving various proteins exist in the literature [3,9,15,71].…”