Corrosion Resistance of Sulfur–Selenium Alloy Coatings

Abstract

Despite decades of research, metallic corrosion remains a long‐standing challenge in many engineering applications. Specifically, designing a material that can resist corrosion both in abiotic as well as biotic environments remains elusive. Here a lightweight sulfur–selenium (S–Se) alloy is designed with high stiffness and ductility that can serve as an excellent corrosion‐resistant coating with protection efficiency of ≈99.9% for steel in a wide range of diverse environments. S–Se coated mild steel shows a corrosion rate that is 6–7 orders of magnitude lower than bare metal in abiotic (simulated seawater and sodium sulfate solution) and biotic (sulfate‐reducing bacterial medium) environments. The coating is strongly adhesive, mechanically robust, and demonstrates excellent damage/deformation recovery properties, which provide the added advantage of significantly reducing the probability of a defect being generated and sustained in the coating, thus improving its longevity. The high corrosion resistance of the alloy is attributed in diverse environments to its semicrystalline, nonporous, antimicrobial, and viscoelastic nature with superior mechanical performance, enabling it to successfully block a variety of diffusing species.

Melt-Quenched Glass Films of Coordination Polymers as Impermeable Barrier Layers and Protective Anticorrosion Coatings

“… − Simultaneously, E corr of the ZnP-H 2 Im glass-coated Al plate was shifted to a higher potential (−1.24 V), implying that the Al plate became more thermodynamically stable in corrosive environments after surface modification. The concurrent reduction in i corr and increase of E corr were clear signals for effective inhibition of the ZnP-H 2 Im glass coating against electrochemical corrosion. − Moreover, in comparison with the bare and UiO-66-modified Al plates, surface coating with the ZnP-H 2 Im glass resulted in much higher polarization resistance ( R p , 3.90 × 10 6 Ω) and corrosion protection efficiency (PE, 99.98%), as well as a 4 orders of magnitude reduction in corrosion rate (CR, 4.94 × 10 –3 mpy), thereby demonstrating its superiority in preventing the Al plate from being corroded (see Figure e, as well as Table S1 in the Supporting Information).…”

An AI-based approach for detecting cells and microbial byproducts in low volume scanning electron microscope images of biofilms

“…The exponential phase pure cultures (10%) of DA-G20 were prepared and inoculated (40 mL) into the Paracell Kit (Gamry Instruments) using low carbon steel electrodes with the volume of 360 mL lactate C media. All the electrochemical measurements and their results were discussed in our recent publication (Susarla et al, 2021 ).…”

Recent Progress in Cyclic Aryliodonium Chemistry: Syntheses and Applications

“…Their work illustrates how HCIs can be efficiently utilized to access complex building blocks. Considering the essential functions of selenium or silicon-containing frameworks in drugs − or optoelectronic materials, − concise synthetic routes to these scaffolds are receiving much attention. − In 2017, Xu and co-workers disclosed copper-catalyzed dual arylations between cyclic diaryliodoniums 91 and Se, potassium thioacetate (AcSK), or dichlorodimethylsilane for construction of triselenasumanene, chalcogenasumanenes, and silicon-containing heterosumanene 92 , which may pose considerable synthetic challenges of preparation by conventional approaches (Scheme B) . It is noteworthy that this protocol would inspire the study of iodine-doping to the aromatic frameworks for the synthesis of novel curved and planar π-extended materials, such as nanoloops, buckybowls, and nanographenes.…”