Aramid-Zirconia Nanocomposite Coating With Excellent Corrosion Protection of Stainless Steel in Saline Media

Abstract

Resistance to stainless steel corrosion in marine-based industries requires more research into materials with an improved surface and enhanced protection by utilizing surface coatings. Herein, a thermally stable aramid-zirconia nanocomposite has been successfully prepared using the sol-gel method to produce a zirconia network-structure bonded to the polymer chain. Using thermal gravimetric analysis (TGA), the residue mass of zirconia retained after the thermal degradation of aramid-zirconia film was determined and found to be 10% by mass. The investigated nanocomposite (using 10% zirconia) was coated on the stainless-steel surface through a facile and effective spin coating method and its protection was examined in saline solution (3.5% NaCl). The aramid-zirconia nanocomposite coating (Ar-Zr10) was found to provide an outstanding corrosion resistance to steel surfaces which led to protecting it against the corrosive marine environment. The electrochemical impedance (EIS) measurements were carried out to evaluate steel resistance against dissolution in chloride solution in the absence and presence of the investigated coatings showed a corrosion protection efficiency of 99.3% using Ar-Zr10 compared to 92.1% using pure aramid. Moreover, the potentiodynamic polarization (PDP) plots showed a pronounced decrease in the corrosion current values which confirmed the formation of a passive layer which mitigated the corrosion reaction and ions diffusion. The water contact angle of stainless-steel coated with pure aramid and the aramid-zirconia was found to be 84.2 • and 125 • , respectively, confirming the hydrophobic nature of the hybrid coating Ar-Zr10. On the other hand, the results achieved through the electrochemical and surface techniques were used to clarify the protection mechanism. The aramid-zirconia nanocomposite coating showed a remarkable protection performance by controlling the charge transfer at the interface between the steel alloy and the electrolyte which prevented the alloy dissolution.

Stem-Cell-Regenerative and Protective Effects of Squid (Symplectoteuthis oualaniensis) Skin Collagen Peptides against H2O2-Induced Fibroblast Injury

“…The amide I peak was observed at 1640 cm −1 , 1643 cm −1 , and 1633 cm −1 for PSC, ASC, and SCP, respectively; the amide I band of SCP was positioned at a lower level, suggesting that the C=O stretching vibration of the peptide bond may alter the triple-helix structure. The wavenumbers at the amide II bands of PSC and ASC (1539 cm −1 ) were observed to be lower, indicating a higher degree of hydrogen bonding [ 47 ] in collagen derived from squid compared to the typical absorption range at the amide II band position (1550–1600 cm −1 ). The amide II band of SCP was observed at 1562 cm −1 , displaying a characteristic absorption peak.…”

Molecular Understanding of the Interfacial Interaction and Corrosion Resistance between Epoxy Adhesive and Metallic Oxides on Galvanized Steel

“…The Nyquist curve radius of the Zn-Al-Mg coating is greater than that of the Zn-Al coating, demonstrating that it possesses stronger corrosion resistance. The equivalent circuit diagram of the EIS fitting is shown in Figure 11b, where R s represents the resistance of the corrosive solution, R ct represents the resistance of charge transfer, and a constant phase element (CPE) replaced the capacitive element of coating to obtain the best fit [51]. The fitting data for the EIS equivalent circuit are provided in Table 3, where the R s values for both samples are similar (with a relative error of no more than 5%).…”

A Self-Cleaning Approach Utilizing Metal Oxide Thin Films and Nanocomposites

“…Metal oxide-based polymer nanocomposites such as A coating made of Aramid zyrconia nanocomposites, that is, ZrO 2 combined with 1, 4-phenylene diamine, demonstrated remarkable protection by controlling charge transfer at the interface between steel alloy and electrolyte, preventing alloy dissolution [28]. TiO 2 and polyurethane nanocomposites have shown self-cleaning and antibacterial activities of textiles [29,30].…”