Corrosion protection mechanism of Ce⁴⁺/organic inhibitor for AA2024 in 3.5% NaCl

Abstract

Proposed corrosion protection mechanism of Ce4+/ organic inhibitor for AA2024.

Investigation on the composition and corrosion resistance of cerium-based conversion treatment by alkaline methods on aluminum alloy 6063

“…In this study, the i corr for bare sample is 13.36 mA cm À2 , while the i corr for CeMCC is 0.24 mA cm À2 , about two orders of magnitude lower than the former. The i corr of CeMCC is lower than that of Mohamed et al, 29 but worse than that of Kanani's research, 33 in which the i corr lowered from 5.1 mA cm À2 to 0.075 mA cm À2 . The strong current reduction observed for the CeMCC can be attributed to the large amount of cerium/molybdenum compounds precipitation on the substrate.…”

“…The physical explanation of low-frequency inductive loop is not sufficiently clear; it has been attributed to the relaxation of adsorbed intermediate species 57 and/or formation of a passive layer and/or redox activity. 29 In this work, the inductive loop of the two coated samples may be related to redox activity, which may indicate that Ce(IV) undergoes a redox process in the low frequency region. The Bode plots are presented in Fig.…”

“…They found that the CeCC with 0.4 g L À1 La additive or post-treated by the same amount of La for 90 s exhibit the best anti-corrosion performance compared to the CeCC and untreated steel. Mohamed et al 29 examined the synergistic inhibition effect of Ce 4+ and melamine on the corrosion of aluminum alloy 2024 (AA2024) in 3.5% NaCl solution. Results of this study showed that a combination of 50% Ce 4+ and 50% melamine results in the lowest corrosion rates, and the mechanism of protection revealed that the reduction of Ce 4+ to Ce 3+ occurs during corrosion protection of AA2024.…”

Enhanced Corrosion Protection of Epoxy/ZnO-NiO Nanocomposite Coatings on Steel

“…The former of these experiments reproduced the aqueous corrosive ions from the surface of the Epoxy/1.8 ZnO-NiO coating, while the latter generated an impediment in the dissemination of the ionic electrolyte, which created the notable corrosion defensive capability in the nanostructured metal oxide composite coatings [59][60][61][62][63][64][65][66][67][68]. Figure 6.…”

Experimental Study on Ascorbic Acid Additive as Green Inhibitor Against Corrosion of Mild Steel

“…Table4and fig9 shows the weight loss of mild steel coated with Aluminum paint (without inhibitor) in different corrosive medium. It is clear from the table that after seven weeks the weight of the mild steel coated with Aluminum paint (without inhibitor) decreased to 82.92 g, 82.90 g, 82.89 g, and 82.87 g, respectively in the tap water, in seawater the weight of coated mild steel decreased to 82.43 g, 82.39 g, 82.37 g and 82.33 g respectively whereas in 3% of Na2CO3 solution the weight of coated mild steel decreased to 81.99 g, 81.98 g, 81.98 g and 81.97g respectively.…”