Corrosion resistance and biocompatibility of calcium-containing coatings developed in near-neutral solutions containing phytic acid and phosphoric acid on AZ31B alloy

Shi, Xiaoting; Wang, Yu; Li, Hongyu; Zhang, Shufang; Zhao, Rongfang; Li, Guoqiang; Zhang, Rongfa; Yang, Sheng; Cao, Siyue; Zhao, Youjun; Xu, Linna; Zhao, Ying

doi:10.1016/j.jallcom.2020.153721

Cited by 111 publications

(55 citation statements)

References 62 publications

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“…4 f. The EC model of (Ca–P) 10 coating presents a high frequency capacitor loop composed of Q dl and R ct , implying double layer capacitance and charge transfer resistance of the (Ca–P) 10 coating. The inductance L and resistance R L in the low frequency region symbolize the pitting of the exposed substrate or peeling of the coating [ 61 , 62 ], which can be confirmed by the above loose structure in 3.1 . For the (Ca–P/SCC) 10 coating in Fig.…”

Section: Resultsmentioning

confidence: 95%

In vitro degradation, photo-dynamic and thermal antibacterial activities of Cu-bearing chlorophyllin-induced Ca–P coating on magnesium alloy AZ31

Zhang

Wang

et al. 2022

Bioactive Materials

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Section: Resultsmentioning

confidence: 95%

In vitro degradation, photo-dynamic and thermal antibacterial activities of Cu-bearing chlorophyllin-induced Ca–P coating on magnesium alloy AZ31

Zhang

Wang

et al. 2022

Bioactive Materials

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“…Their capacitive loops in the Nyquist plots are also the largest among all compounds tested (see Supplementary Materials , Figure S1 ). Both high Bode moduli and large capacitive loops in Nyquist plots correlate with high corrosion resistance [ 50 , 51 ]. The imperfect layer formation of 18 is reflected by a Warbug impedance element, and the Bode plot of 18 reveals two time constants in contrast to all other examples.…”

Section: Resultsmentioning

confidence: 99%

Natural Product-Derived Phosphonic Acids as Corrosion Inhibitors for Iron and Steel

et al. 2022

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Organic acids, typically derived from an oil-based value chain, are frequently used as corrosion inhibitors in industrial metal working fluids. The criteria for selection of these corrosion inhibitors have changed in the last decades, and are today not only performance-driven, but influenced by ecological considerations, toxicity and regulatory standards. We present scalable semisynthetic approaches to organic corrosion inhibitors based on phosphonic acids from renewable resources. They have been evaluated by chip filter assay, potentiodynamic polarization measurements, electrochemical impedance measurements and gravimetry for corrosion protection of iron and steel in an aqueous environment at slightly alkaline pH. The efficacy of several phosphonic acids tested was found to be strongly dependent on structural features influencing molecular self-assembly of protective layers, and the solubility of salts formed with di- and trivalent cations from the media or formed during corrosion. A carboxyphosphonic acid (derived from castor oil) was found to have remarkable anticorrosive effects in all media tested. We attribute the anticorrosion properties of this carboxyphosphonic acid to the formation of particularly stable protective layers on the metal surface. It might thus serve as a commercially attractive substitute for current acidic corrosion inhibitors, derived from renewable resources.

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“…Note that the stability of the anticorrosive coating on metal surfaces can also be checked by taking SEM images of immersed samples over time [ 54 ]. However, the surface morphology of polished AA2024 coated with ODTMS is very inhomogeneous because of second-phase particles with different morphology and chemical composition.…”

Section: Resultsmentioning

confidence: 99%

Stability of Octadecyltrimethoxysilane-Based Coatings on Aluminum Alloy Surface

et al. 2022

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Long-term stability in contact with water of organosilane layers formed by octadecyltrimethoxysilane (ODTMS) on polished aluminum alloy (AA2024) through dip-coating was studied by combining SEM, water contact angle measurements, and X-ray photoelectron spectroscopy. Similar organosilane layers were formed on AA2024 coated with permanganate conversion coating, 1,2-bis(triethoxysilyl)ethane (BTSE) and hydrated SiOx as under-layers, after which their long-term durability was also tested. During immersion in water for about one month, all the samples exhibited a decrease in hydrophobicity, implying the prepared organosilane layer was not stable over time, gradually hydrolyzing and letting water interact with the underlying layer. In parallel, SEM images of one-layer samples taken after immersion showed clear signs of local electrochemical corrosion, while XPS analysis confirmed a loss of silicon from the surface layer. The highest stability over time was demonstrated by a one-layer sample prepared in an ethanol/water bath for 5 min and by a similar ODTMS layer prepared on hydrated MnOx as an under-layer.

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Corrosion resistance and biocompatibility of calcium-containing coatings developed in near-neutral solutions containing phytic acid and phosphoric acid on AZ31B alloy

Cited by 111 publications

References 62 publications

In vitro degradation, photo-dynamic and thermal antibacterial activities of Cu-bearing chlorophyllin-induced Ca–P coating on magnesium alloy AZ31

In vitro degradation, photo-dynamic and thermal antibacterial activities of Cu-bearing chlorophyllin-induced Ca–P coating on magnesium alloy AZ31

Natural Product-Derived Phosphonic Acids as Corrosion Inhibitors for Iron and Steel

Stability of Octadecyltrimethoxysilane-Based Coatings on Aluminum Alloy Surface

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