Improving the corrosion protection of 2524-T3-Al alloy through reactive sputtering Nb2O5 coatings

Moreto, Jéferson Aparecido; Gelamo, Rogério Valentim; Nascimento, João Pedro Lopes do; Taryba, Maryna; Fernandes, João

doi:10.1016/j.apsusc.2021.149750

Cited by 34 publications

(19 citation statements)

References 54 publications

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“…After 1-hour at open circuit, EIS tests started using a frequency of 100 kHz to 10 mHz, and a sinusoidal perturbation of 10 mVrms around -20 mV vs OCP. Non-linear behavior was found for some Al-alloys at anodic portion of the AC perturbation when tested after early stages of immersion in sodium chloride solution [23], so taken an cathodic potential of -20 mV vs OCP has been reported as effective to ensure linearity, as further validated in [24][25][26]. Following the EIS testing, the samples were exposed to an open circuit condition for 10 minutes to ensure that the corroding system could attain the potential values range prior to EIS.…”

Section: Methodsmentioning

confidence: 86%

Corrosion Resistance of Fe-Contaminated Al-Si-CU-Zn Alloys Modified With NI and Co and with Variable Secondary Dendrite Arm Spacing

Xavier¹,

Freitas²,

Koga³

et al. 2022

Preprint

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The corrosion behavior of Fe-containing directionally solidified (DS) and centrifugally cast (CC) Al-Si-Cu-Zn alloys with either Co or Ni additions has been investigated. Electrochemical and immersion corrosion methods were used to investigate the corrosion behavior in 0.6 M NaCl after short (1-hour) and long (30-day) exposure periods. The employed solidification methods allowed the production of samples with a wide range of secondary dendrite arm spacing (SDAS) while preserving Si and Fe-containing phases. The 0.5 wt.% Ni and Co additions led to the growth of the AlFeSi(Ni) and AlFeSi(Co) phases, but no binary AlNi nor AlCo intermetallic par-ticles have been generated. Potentiodynamic polarization studies at early exposure revealed an increase in the corrosion potential as the Ni was added for either fast or slow solidified samples. The electrochemical impedance spectroscopy at early exposure demonstrated that the Ni-modified alloy, on the other hand, was associated to smaller charge transfer resistances, in-dicating a reduction in corrosion resistance after short elapsed time into the electrolyte. Howev-er, 30-day immersion tests revealed much lower corrosion rate of the Ni-modified alloy than the other alloys, while the corrosion rates of the Co-modified and non-modified alloys were simi-lar. In the Ni-containing alloy, decreased corrosion rate under long-term corrosion process was attributed to the formation of a thick and dense alumina layer, effectively protecting the surface under such conditions. This work contributes to a better knowledge of the corrosion behavior of Ni- and Co-corrected Al industrial scrap compositions.

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Section: Methodsmentioning

confidence: 86%

Corrosion Resistance of Fe-Contaminated Al-Si-CU-Zn Alloys Modified With NI and Co and with Variable Secondary Dendrite Arm Spacing

Xavier¹,

Freitas²,

Koga³

et al. 2022

Preprint

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“…Here, the CPEbl values were converted to capacitances (Cbl) for the Ti-6Al-4V alloy, seeking to determine the thickness of the oxide layer with the evolution of the corrosion process. For this purpose, the Equation (2) that was presented by Moreto et al [20] to study the corrosion properties of the 2524-T3 aluminium alloy containing Nb2O5 coatings and derived from Brug's equation [21] was used to determine the Cbl values. It is important to mention that this relationship can only be used for values of n > 0.8.…”

Section: Resultsmentioning

confidence: 99%

The use of POPE Phospholipid as a First-layer Coating of the Ti-6Al-4V Alloy: Preliminary Studies

Do Nascimento,

Ferreira,

Teixeira

et al. 2024

Orbital: Electron. J. Chem.

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Phospholipids emerge as a powerful tool to be used as a coating for biomaterials, as they can increase the biocompatibility of the material and inhibit the growth of bacterial cells. Here, POPE phospholipid was deposited on the Ti-6Al-4V alloy surfaces by using a simple method, seeking to improve the corrosion resistance of the base material. Results show that the electrochemical potential of the Ti-6Al-4V/POPE is more positive than that observed in the base material, which could indicate a lower susceptibility to corrosion. Two EECs were used to explain the corrosion mechanisms of the coated and uncoated specimens, demonstrating the base material displays an oxide layer about 1.86 nm in the beginning of the corrosion tests and 2.59 nm after 24 h of immersion. Due to the complexity of the system containing lipids deposited on the metallic matrix, the corrosion behaviour of Ti-6Al-4V/POPE was evaluated considering only the evolution of the CPEs with immersion times. This work shows that the use of POPE for coating the Ti-6Al-4V alloy increased the corrosion resistance of the base material, expanding the range of advantages in the use of this surface treatment in the development of new biomaterials.

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“… 10 , 11 Therefore, how to effectively reduce the surface corrosion of materials has become an important issue in the surface treatment of Al alloy materials. 12 − 14 …”

Section: Introductionmentioning

confidence: 99%

“…Aluminum (Al) alloy materials are indispensable in the industrial field due to their high strength, low density, and good processing performance, which are widely used in various fields such as electronic engineering, petrochemical engineering, and aerospace. − However, corrosion occurs when all alloy materials are exposed to the atmosphere, seawater, soil, and other media, resulting in equipment damage and huge economic losses. − Al has high electrochemical activity, and Al alloys are easy to be corroded in many application environments, especially in chloride solutions, which seriously restricts their promotion and applications in various fields. , Therefore, how to effectively reduce the surface corrosion of materials has become an important issue in the surface treatment of Al alloy materials. − …”

Section: Introductionmentioning

confidence: 99%

Laser-Induced Slippery Liquid-Infused Surfaces with Anticorrosion and Wear Resistance Properties on Aluminum Alloy Substrates

Cai

Lian

et al. 2022

ACS Omega

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Slippery liquid-infused surfaces (SLISs) are developed as a potential alternative to superhydrophobic surfaces (SHSs) to resolve the issues of poor durability in corrosion protection and wear resistance. In this work, we used a simple laser processing technology to prepare a SLIS on the aluminum alloy (7075) surface. The superhydrophobicities of the modified surface and the oil film formed by liquid injection make the corrosive medium difficult to directly contact the surface and thus have a significant effect on corrosion resistance. The water and oil repellent SLIS exhibits durable corrosion resistance and excellent tribological properties compared with the SHS. The anticorrosion and wear resistance performances provided by the composite film have been assessed by multiple methods including the electrochemical test, immersion test, and friction wear test. The results indicate that compared to the bare surface, laser-ablated surface (LAS), and fluoroalkyl silane-modified SHS, the SLIS composite coating has better corrosion resistance and wear resistance, which is of great significance to expand the potential applications of 7075 aluminum alloys. The work provides a research basis for expanding the practical application of SLISs in complex environments.

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Improving the corrosion protection of 2524-T3-Al alloy through reactive sputtering Nb2O5 coatings

Cited by 34 publications

References 54 publications

Corrosion Resistance of Fe-Contaminated Al-Si-CU-Zn Alloys Modified With NI and Co and with Variable Secondary Dendrite Arm Spacing

Corrosion Resistance of Fe-Contaminated Al-Si-CU-Zn Alloys Modified With NI and Co and with Variable Secondary Dendrite Arm Spacing

The use of POPE Phospholipid as a First-layer Coating of the Ti-6Al-4V Alloy: Preliminary Studies

Laser-Induced Slippery Liquid-Infused Surfaces with Anticorrosion and Wear Resistance Properties on Aluminum Alloy Substrates

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