Bronze corrosion protection by long-chain phosphonic acids

Mikić, Dajana; Ćurković, Helena Otmačić; Hosseinpour, Saman

doi:10.1016/j.corsci.2022.110445

Cited by 14 publications

(8 citation statements)

References 58 publications

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“…In the case of the protected samples, there is probably an additional influence of a reorganization of PA film into a more compact structure. This behavior was also observed for PA films formed on bare bronze [ 46 ]. On the other hand, for dip-coated and sprayed samples, dried at room temperature, after several days of immersion, R p becomes lower than the blank sample.…”

Section: Resultssupporting

confidence: 65%

“…In order to determine the best way of PA application on the surface of patinated bronze, dip coating, spraying, and brushing methods were tested. In all cases, 1 mM PA ethanolic solution was used as this concentration was previously found to result in well protective film on bare bronze [ 46 ]. The PA film formation was conducted according to the experimental procedures presented in Table 2 .…”

Section: Methodsmentioning

confidence: 99%

“…The dry film thickness measured with PosiTector 6000 (DeFelsko) was 7 ± 2 μm. The thickness of the phosphonic acid film was determined by ellipsometry in our previous work [ 46 ], which is around 10 nm, and the thickness of the patina is around 1 μm.…”

Section: Methodsmentioning

confidence: 99%

“…The aim of this work is to examine the possibility of using a long-chain phosphonic acid (16-phosphonohexadecanoic acid) as an environmentally friendly and non-toxic corrosion inhibitor for patinated bronze and to determine whether it can improve the protective properties of acrylic coating Paraloid B-72. It was proven that long-chain organic acids could protect clean metal surfaces [ 46 , 47 ], but until now, they were not investigated for the protection of pre-corroded/patinated surfaces and in combination with Paraloid B-72. Although corrosion inhibitors are often added into coating formulation, our preliminary studies showed that much better results are obtained when studied phosphonic acid is applied prior to Paraloid application.…”

Section: Introductionmentioning

confidence: 99%

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Protection of Patinated Bronze with Long-Chain Phosphonic Acid/Organic Coating Combined System

Mikić

Ćurković

2023

Materials

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Bronze cultural heritage in urban areas is susceptible to decay due to the significant amount of pollutants present in the air. This causes the dissolution of bronze and the patina on its surface. The efficient protection of outdoor bronze cultural heritage is still an unresolved problem. The aim of this work is to investigate 16-phosphonohexadecanoic acid as an environmentally friendly and non-toxic corrosion inhibitor for patinated bronze. The corrosion protection of sulphide-patinated bronze by phosphonic acid alone and in combination with acrylic coating Paraloid B-72 is examined. In order to achieve efficient corrosion protection, various parameters of the phosphonic acid application were studied. The efficiency of protection is examined by electrochemical impedance spectroscopy (EIS) during the immersion in simulated acid rain solution and after exposure to a corrosion chamber. It was found that the studied phosphonic acid provides corrosion protection to patinated bronze and significantly improves the protective properties of Paraloid B72. This was also confirmed by scanning electron microscopy (SEM) examination of the coating surface after exposure to a corrosive environment.

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Section: Resultssupporting

confidence: 65%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Protection of Patinated Bronze with Long-Chain Phosphonic Acid/Organic Coating Combined System

Mikić

Ćurković

2023

Materials

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“…The bands at 1471 cm −1 and 716 cm −1 were attributed to the ν(CH 2 ) and ν(P-C) vibrations, respectively [49]. The absorption peaks at 1228 and 947 cm −1 were assigned to ν as (P=O) and ν as (P-OH), and the bands at 1076 and 1005 cm −1 were assigned to the symmetric ν s (PO 3 ) and asymmetric ν as (PO 3 ) stretching vibrations, respectively [40,50,51]. The spectra of bare ST and SN samples showed peaks at 3442 and 1630 cm −1 , which were attributed to O-H vibrations.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

Preparation of Hydrophobic Octadecylphosphonic Acid-Coated Magnetite Nanoparticles for the Demulsification of n-Hexane-in-Water Nanoemulsions

Liang,

Han,

Wang

et al. 2023

Materials

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To design more environmentally friendly, economical, and efficient demulsifiers for oily wastewater treatment, hydrophobic octadecylphosphonic acid (ODPA)-modified Fe3O4 nanoparticles (referred to as Fe3O4@ODPA) were prepared by condensation of hydroxyl groups between ODPA and Fe3O4 nanoparticles using the co-precipitation method. The prepared magnetite nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric/differential thermogravimetric (TG/DTG) analysis. The water contact angles (θW) of Fe3O4@ODPA nanoparticles were more than 120°, indicating hydrophobic nature, and the diameter of the obtained spherical-shaped magnetite nanoparticles was 12–15 nm. The ODPA coating amount (AO) (coating weight per gram Fe3O4) and specific surface area (SO) of Fe3O4@ODPA were 0.124–0.144 g·g−1 and 78.65–91.01 m2·g−1, respectively. To evaluate the demulsification ability, stability, and reusability, the magnetite nanoparticles were used to demulsify an n-hexane-in-water nanoemulsion. The effects of the magnetite nanoparticle dosage (CS), pH value of nanoemulsion, and NaCl or CaCl2 electrolytes on the demulsification efficiency (RO) were investigated. The RO of Fe3O4@ODPA samples was found to be higher than that of bare Fe3O4 samples (S0, ST, and SN) under all CS values. With the increase in CS, the RO of Fe3O4@ODPA samples initially increased and then approached equilibrium value at Cs = 80.0 g·L−1. A maximum RO of ~93% was achieved at CS = 100.0 g·L−1 for the Fe3O4@ODPA sample S2. The pH and two electrolytes had a minor effect on RO. The Fe3O4@ODPA nanoparticles maintained high RO even after being reused for demulsification 11 times. This indicates that the hydrophobic Fe3O4@ODPA samples can be used as an effective magnetite demulsifer for oil-in-water nanoemulsions.

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Self‐Assembled Layer of Organic Phosphonic Acid Enables Highly Stable MnO2 Cathode for Aqueous Znic Batteries

Xiao,

Zhang,

Xin

et al. 2024

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Manganese dioxide (MnO2) is an attractive cathode material for aqueous zinc batteries (AZBs) owing to its environmental benignity, low cost, high operating voltage, and high theoretical capacity. However, the severe dissolution of Mn2+ leads to rapid capacity decay. Herein, a self‐assembled layer of amino‐propyl phosphonic acid (AEPA) on the MnO2 surface, which significantly improves its cycle performance is successfully modified. Specifically, AEPA can be firmly attached to MnO2 through a strong chemical bond, forming a hydrophobic, and uniform organic coating layer with a few nanometers thickness. This coating layer can significantly inhibit the dissolution of Mn2+ by avoiding the direct contact between the electrolyte and cathode, thus enhancing the structural integrity and redox reversibility of MnO2. As a result, the MnO2@AEPA cathode achieves a high reversible capacity of 223 mAh g−1 at 0.5 A g−1 and a high capacity retention of 97% after 1700 cycles at 1 A g−1. This work provides new insights in developing stable Mn‐based cathodes for aqueous batteries.

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Bronze corrosion protection by long-chain phosphonic acids

Cited by 14 publications

References 58 publications

Protection of Patinated Bronze with Long-Chain Phosphonic Acid/Organic Coating Combined System

Protection of Patinated Bronze with Long-Chain Phosphonic Acid/Organic Coating Combined System

Preparation of Hydrophobic Octadecylphosphonic Acid-Coated Magnetite Nanoparticles for the Demulsification of n-Hexane-in-Water Nanoemulsions

Self‐Assembled Layer of Organic Phosphonic Acid Enables Highly Stable MnO2 Cathode for Aqueous Znic Batteries

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