Corrosion performance of powder‐coated aluminum profiles with increased trace element content

Lutz, Alexander; Halseid, Malgorzata; Graeve, Iris De

doi:10.1002/maco.202213173

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…In addition, comparative studies between different surface treatment processes are rarely seen. In this work, the corrosion resistance of powder coatings and anodized films on the surfaces of aluminum alloy building profiles was studied [20][21][22][23][24][25][26][27][28]. Through the coupling analysis of microscopic observation and electrochemical fitting, scanning electron microscopy (SEM) and electrochemical analysis were used to investigate the corrosion behavior and corrosion resistance of the sand texture film layer, the flat powder film layer, the hard anodized, and the ordinary anodized heat-sealed hole aluminum alloy profiles in weakly corrosive electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Surface Treatment Process on the Corrosion Resistance of Aluminum Alloy Profile Coating

Fan,

Wang,

Wang

et al. 2023

Materials

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This work focuses on different surface treatment processes of the 6061 aluminum alloy profile coatings in the construction industry, mainly including the sand powder film coating, the flat powder coating, the hard anodized film, and the ordinary heat-sealing oxidized coating. The corrosion resistance of the coated aluminum alloy in a 3.5 wt.% NaCl solution (pH 6.5–7.5) and the influence of different surface treatment processes on the corrosion resistance of different samples were studied by scanning electron microscope (SEM) and electrochemical workstation. The result shows that with the increase in corrosion time, the corrosion inhibition performance of the four coated aluminum alloy materials decreased significantly, and the order of decline is: sand powder film coating > hard anodized film > flat powder coating > ordinary heat-sealing oxidized coating. When corroded in a 3.5 wt.% NaCl solution for 2 h, the corrosion inhibition performances of the flat powder coating and ordinary heat-sealing oxidized coating are poor, while the inhibition performances of the sand powder film coating and hard anodized film are good, and the inhibition performance follows the following sequence: the sand powder film coating > hard anodized film> the flat powder coating > ordinary heat-sealing oxidized coating. When corroded in a 3.5 wt.% NaCl solution for 200 h, the corrosion inhibition performances of the sand powder film coating and the flat powder coating are poor, while the inhibition performances of hard anodized film and ordinary heat-sealing oxidized coating are good, and the inhibition performance follows the following sequence: hard anodized film > ordinary heat-sealing oxidized coating > the sand powder film coating > the flat powder coating.

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Section: Introductionmentioning

confidence: 99%

Study on the Influence of Surface Treatment Process on the Corrosion Resistance of Aluminum Alloy Profile Coating

Fan,

Wang,

Wang

et al. 2023

Materials

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“…In other words, eco-friendly powder coatings do not need a solvent to make a homogeneous mixture as a binder and an additive, which reduces fire risk during storage and handling. − These coatings have gained a stable place in the coating industry due to their superior properties over conventional liquid coatings like energy saving, cost-effectiveness, elimination of hazardous waste, fast curing, and eco-friendly process. − However, some micropores are formed during the reaction of crosslinkers, and the curing process may lead to physical defects on the surface of the coating. Generally, the propagation of cracks and fractures in the coating facilitates diffusion pathways into the metal substrate for water, ion, and oxygen, resulting in localized corrosion and a reduction in the service life of the coating. − Therefore, improving the longevity and anti-corrosion performance of powder coatings is a persuasive issue. − …”

Section: Introductionmentioning

confidence: 99%

Ti₃C₂ MXene/Polyaniline/Montmorillonite Nanostructures toward Solvent-Free Powder Coatings with Enhanced Corrosion Resistance and Mechanical Properties

Nazarlou

Hosseini

Dorraji

et al. 2023

ACS Appl. Nano Mater.

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Solvent-free powder coatings have become very popular in the coating industry in replacing conventional liquid coatings for the last decades. However, poor adhesion of powder coatings to the substrate and micropores inevitably created during the curing process of coatings lead to localized corrosion and reduced mechanical resistance. For this purpose, Ti 3 C 2 MXene/ polyaniline (PANI)/montmorillonite (MMT) nanocomposites with superior conductivity and adhesion capabilities were incorporated into the eco-friendly powder coating. The as-synthesized nanocomposites were analyzed using various techniques such as Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, field-emission scanning electron microscopy, and Raman spectroscopy. To evaluate the effectiveness of the powder coating in preventing corrosion on a mild steel substrate, two methods were employed: potentiodynamic polarization and electrochemical impedance spectroscopy. The electrochemical tests revealed that an excellent dispersion of 1.5 wt % Ti 3 C 2 MXene/ PANI/MMT nanosheets in a polyester/epoxy powder coating resulted in superior anti-corrosion performance (4.8 × 10 6 Ω) after 42 days of immersion in 3.5 wt % NaCl as compared to blank samples (7.2 × 10 2 Ω). According to Tafel analysis, the corrosion potential of the optimal sample is −0.062 V, which is more positive than that of the pristine powder coating (−0.83 V). The polarization resistance (R p ) and corrosion current (i corr ) of the optimal sample are determined to be 3.39 × 10 6 Ω•cm 2 and 7.69 × 10 −9 A•cm −2 , respectively. Moreover, the optimal sample marginally increased the hardness (229.42 MPa) compared to the pure sample (152.68 MPa) due to the synergistic effect of Ti 3 C 2 MXene and flake-like MMT nanoparticles, which results in an improvement in the mechanical strength of powder coatings. Additionally, the presence of PANI caused further crosslinking and modulation of the electrical conductivity of the produced nanocomposites. The present study proposes a practical method to enhance the mechanical and shielding properties of solvent-free powder coatings, making them suitable for use in various real-world applications, including commercial, medical, and household sectors.

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“…7 Certain recycling friendly alloys can be manufactured without property loss compared to primary based alloys by adjusted composition windows. [8][9][10][11][12] The role of impurity elements in the adjusted composition windows of the recycling friendly alloys is far from clear. Thus, for alloys based on PCS, concerns about corrosion exist.…”

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confidence: 99%

Recycled Aluminium Alloys and their Models: Role and Behaviour of Alloying Elements during Alkaline Etching

Mysliu¹,

Storli²,

Kjørsvik³

et al. 2023

J. Electrochem. Soc.

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Alkaline etching is a common pretreatment for aluminium surfaces. Etching behaviour was compared between an alloy based on post-consumer scrap (PCS) and several model alloys of rolled AA3005 and extruded AA6060 with systematically varied amounts of Mn, Cu, and Ni. Analysis of concentrations of alloy elements in the etching solution by inductively coupled plasma mass spectrometry (ICP-MS) shows that significant fractions of the investigated elements Cu, Fe, Mg, Mn, Ni, and Zn dissolve. Surface analysis of samples in different stages of the etching process show (i) an increase in oxide layer thickness with etching time, (ii) an enrichment of important alloy elements and impurities (Cr, Cu, Fe, Mg, Mn, Si) near the metal/oxide interface, and (iii) the deposition of Mg, Fe, Si-containing aluminium hydroxide on the surface. A comparison with open circuit potential measurements and time-resolved electrochemical polarisation resistance measurements enables a detailed analysis of the etching mechanism. The aluminium dissolution rate during etching is limited by the transport of species through the oxide precursor layer, making it potential-independent. Differences in etching rates between different alloy classes, evidenced by mass loss measurements, are related to differences in the cathodic or anodic reaction mechanisms (hydrogen evolution or metal dissolution) during etching.

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Corrosion performance of powder‐coated aluminum profiles with increased trace element content

Cited by 4 publications

References 17 publications

Study on the Influence of Surface Treatment Process on the Corrosion Resistance of Aluminum Alloy Profile Coating

Study on the Influence of Surface Treatment Process on the Corrosion Resistance of Aluminum Alloy Profile Coating

Ti₃C₂ MXene/Polyaniline/Montmorillonite Nanostructures toward Solvent-Free Powder Coatings with Enhanced Corrosion Resistance and Mechanical Properties

Recycled Aluminium Alloys and their Models: Role and Behaviour of Alloying Elements during Alkaline Etching

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Corrosion performance of powder‐coated aluminum profiles with increased trace element content

Cited by 4 publications

References 17 publications

Study on the Influence of Surface Treatment Process on the Corrosion Resistance of Aluminum Alloy Profile Coating

Study on the Influence of Surface Treatment Process on the Corrosion Resistance of Aluminum Alloy Profile Coating

Ti3C2 MXene/Polyaniline/Montmorillonite Nanostructures toward Solvent-Free Powder Coatings with Enhanced Corrosion Resistance and Mechanical Properties

Recycled Aluminium Alloys and their Models: Role and Behaviour of Alloying Elements during Alkaline Etching

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Ti₃C₂ MXene/Polyaniline/Montmorillonite Nanostructures toward Solvent-Free Powder Coatings with Enhanced Corrosion Resistance and Mechanical Properties