Permanganate loaded Ca-Al-LDH coating for active corrosion protection of 2024-T3 alloy

Olmo, R. del; Mohedano, M.; Matykina, E.; Arrabal, R.

doi:10.1016/j.corsci.2022.110144

Cited by 22 publications

(5 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…55,[62][63][64][65] Other authors obtained similar results for LDH layers of comparable thickness. 66 The peaks located at 2θ of 44°, 65°, and 78°correspond to the (200), (220), and (311) planes of the aluminum substrate. In comparison to the substrate, the diffractograms of the treated sample reveal other supplementary reflections at 2θ values of 32°, 38°, and 83°.…”

Section: Resultsmentioning

confidence: 99%

Study of ZnAl Hydroxides-Based Thin Films to Enhance the Filiform Corrosion Resistance of Acrylic-Coated AA5005

Fedel,

Zonta,

Cristoforetti

2024

J. Electrochem. Soc.

View full text Add to dashboard Cite

In recent years, the imperative to adopt a sustainable approach to aluminum pre-treatments due to environmental concerns has engaged researchers in corrosion studies. This work investigates Zn-Al hydroxides-based conversion coatings developed on AA5005 to enhance filiform corrosion (FFC) resistance. In fact, the conversion coatings were applied as a pre-treatment (200-800 nm thick, depending on synthesis conditions) prior to coating with acrylic paint. The synthesis of the Zn-Al hydroxides conversion coating involves a rapid hydrothermal method at near-neutral pH. Electrochemical tests performed on the ZnAl hydroxides conversion coatings onto AA5005 revealed a substantial improvement in localized corrosion. FFC tests in a climatic chamber exhibit a significant decrease (about 50%) in rust creep filament propagation compared to bare AA5005 after 1000 hours. Those results were obtained employing Zn and Al salts at neutral pH for ten minutes at 95°C. The findings obtained suggest that the synthesis process is of potential interest within the context of chemical surface conversion treatments for aluminum. In fact, eco-friendly metallic salts contribute to a more economical and environmentally friendly waste disposal process, making this treatment a potential solution for industrial applications, considering its simplicity, time efficiency, and use of non-toxic products.

show abstract

Section: Resultsmentioning

confidence: 99%

Study of ZnAl Hydroxides-Based Thin Films to Enhance the Filiform Corrosion Resistance of Acrylic-Coated AA5005

Fedel,

Zonta,

Cristoforetti

2024

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Simultaneously, the released EG can continuously adsorb on steel to physically block the steel surface from being corroded [ 50 ]. The sustain released corrosion inhibitor and entrapment of active Cl ions by LDHs in corrosive media synchronous increase the corrosion resistance of steel over long durations [ 42 , 51 ]. The ever-increasing R ct value ( Figure 9 and Figure 12 ) during the corrosion test can well verified the theoretical analysis.…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis of CaAl-LDH Intercalating with Eugenol and Its Corrosion Protection Performances for Reinforcing Bar

Liu

Geng

et al. 2023

Materials

View full text Add to dashboard Cite

Layered double hydroxides (LDHs) intercalating with a corrosion inhibitor for slowing down the corrosion of a reinforcing bar has attracted considerable attention. However, achieving high-loading capacity of organic inhibitor in LDH with high efficiency and long-term protection characteristics remains an important challenge. In this work, the CaAl-LDH intercalating with eugenol (EG) was synthesized via a continuous hydrothermal method. The prepared LDHs were characterized by SEM, XRD, UV-vis absorption spectra and TGA. Additionally, the corrosion protection performances of LDH-EG for steel bar were studied in detail via the electrochemical method. The results show that the loading amount of EG in LDHs was about 30% and about 80% EG could be released from LDH-EG within 4 h in SCPs containing 3.5% NaCl. The electrochemical test results show that the Rct value (105~106 Ω · cm2) of steel-mortar incorporated with LDH-EG has increased by 3–4 orders of magnitude compared to the specimen without LDHs (102~103 Ω · cm2) after 16 dry–wet cycles corrosion test. The significantly improved protection capability is mainly derived from two aspects: one is the filling effect of LDH, which can fill the pores of mortar and improve the impermeability; another reason is that the intercalated EG can slowly diffuse out of the inner structure of LDHs in a controllable way and result in a relatively long-term effect of corrosion inhibition.

show abstract

“…This has the potential to give long-term corrosion protection. Various corrosion inhibitors have been incorporated as the anionic species within LDHs, and these include inorganic compounds such as molybdate [100][101][102][103], permanganate [104], nitrate [105][106][107], nitrite [77,108,109], phosphate [62], phenylphosphonate [110] and vanadate [111][112][113]. Also, organic inhibitors such as benzoate, 3-aminopropyltriethoxysilane, 8-hydroxyquinoline [63], 5-aminoindazole [90], benzotriazole [114], mercaptobenzothiazole [96,115,116], 2-mercaptobenzothiazole [117], thiophene derivatives [118], aspartic acid [119], 8-hydroxyquinoline [120], triazoles [121], α-amino acids [122] and 2-benzothiazolylthio-succinate [123] have been incorporated as the anionic species in LDHs.…”

Section: Layered Double Hydroxidesmentioning

confidence: 99%

Emerging Layered Materials and Their Applications in the Corrosion Protection of Metals and Alloys

et al. 2022

View full text Add to dashboard Cite

Metals and alloys are essential in modern society, and are used in our daily activities. However, they are prone to corrosion, with the conversion of the metal/alloy to its more thermodynamically-favored oxide/hydroxide phase. These undesirable corrosion reactions can lead to the failure of metallic components. Consequently, corrosion-protective technologies are now more important than ever, as it is essential to reduce the waste of valuable resources. In this review, we consider the role of emerging 2D materials and layered materials in the development of a corrosion protection strategy. In particular, we focus on the materials beyond graphene, and consider the role of transition metal dichalcogenides, such as MoS2, MXenes, layered double hydroxides, hexagonal boron nitride and graphitic carbon nitride in the formulation of effective and protective films and coatings. Following a short introduction to the synthesis and exfoliation of the layered materials, their role in corrosion protection is described and discussed. Finally, we discuss the future applications of these 2D materials in corrosion protection.

show abstract

Permanganate loaded Ca-Al-LDH coating for active corrosion protection of 2024-T3 alloy

Cited by 22 publications

References 53 publications

Study of ZnAl Hydroxides-Based Thin Films to Enhance the Filiform Corrosion Resistance of Acrylic-Coated AA5005

Study of ZnAl Hydroxides-Based Thin Films to Enhance the Filiform Corrosion Resistance of Acrylic-Coated AA5005

Hydrothermal Synthesis of CaAl-LDH Intercalating with Eugenol and Its Corrosion Protection Performances for Reinforcing Bar

Emerging Layered Materials and Their Applications in the Corrosion Protection of Metals and Alloys

Contact Info

Product

Resources

About