pH-Responsive Self-Healing Anticorrosion Coating Based on a Lignin Microsphere Encapsulating Inhibitor

Tan, Zhongchao; Wang, Shan; Hu, Zhuorong; Wu, Kun; Qu, Zhencai; Xu, Chaochao; Zhang, Qian; Wu, Kun; Shi, Jun; Lu, Mangeng

doi:10.1021/acs.iecr.9b05743

Cited by 36 publications

(28 citation statements)

References 37 publications

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“…Therefore, if the local pH decreases due to the corrosion process, the BTA inhibitor is expected to be released at a higher rate, and the corrosion resistance will increase. There are reports in the literature on the use of various materials such as SiO 2 , nanoporous chitosan hybrid particles, lignin microspheres, and zeolitic imidazole framework as BTA carriers. The SiO 2 /BTA system with the loading efficiency of 2.5 wt % can release BTA in a different range of pH values from 3.0 to 9.0 .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a pH-Sensitive Epoxy Nanocomposite Coating Based on a Zn-BTC Metal–Organic Framework Containing Benzotriazole as a Smart Corrosion Inhibitor

Mohammadpour

Zare

2021

Crystal Growth & Design

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In this study, a pH-sensitive Epoxy/BTA@Zn-BTC smart anticorrosion nanocomposite coating was fabricated by the encapsulation of a benzotriazole (BTA) corrosion inhibitor in a Zn-BTC metal−organic framework (MOF). The corrosion process of the coating was investigated for different durations of storing the coating in a corrosive solution of 3.5 wt % NaCl using potentiodynamic polarization (Tafel) plots and electrochemical impedance spectroscopy. The synthesized BTA@Zn-BTC nanocapsules have a loading capacity of 16.5% for BTA. The BTA encapsulated in Zn-BTC MOF is released as the corrosion zone becomes acidic, and it serves as a corrosion inhibitor. The released BTA inhibitor proved to have an inhibition efficiency of 98.8% to protect aluminum against corrosion in the corrosive solution after 3 days. A possible mechanism has been presented for the formation of a protective film in this process. It is argued that in the active areas of corrosion on the metal surface the local pH decreases and the H + ions produced in the corrosion reaction rapidly penetrate into the BTA@Zn-BTC nanocapsules, releasing the BTA inhibitor. Then, the released inhibitor forms a dense barrier in the corrosion area to decrease the corrosion rate. As found in this study, the durability of this smart coating is significantly prolonged in a 3.5 wt % NaCl solution.

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Section: Resultsmentioning

confidence: 99%

Fabrication of a pH-Sensitive Epoxy Nanocomposite Coating Based on a Zn-BTC Metal–Organic Framework Containing Benzotriazole as a Smart Corrosion Inhibitor

Mohammadpour

Zare

2021

Crystal Growth & Design

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“…The larger the | Z | value of the Bode mode plot at f = 0.01 Hz, − the smaller the breakpoint frequency corresponding to 45° in the Bode phase and the larger the diameter of the semicircular arc in the Nyquist diagram. This indicates that the corrosion resistance is greater for the coating. , The Bode module curves of the EP/lecithin/SiO 2 /HEDP 40:2:4:1 , EP/lecithin/SiO 2 /HEDP 40:1:4:2 , and EP/lecithin/SiO 2 /HEDP 40:2:4:2 coatings are shown in the Appendix section (Figure S1). The EP, EP/lecithin/SiO 2 /HEDP 40:2:4:1 , and EP/SiO 2 /HEDP 40:4:1 coatings were soaked in a 3.5 wt % NaCl aqueous solution at 25 °C for 256 h, and electrochemical tests were performed on the shielding performance of these coatings.…”

Section: Resultsmentioning

confidence: 99%

Novel Environmentally Friendly Waterborne Epoxy Coating with Long-Term Antiscaling and Anticorrosion Properties

Wang

Liu

et al. 2021

Langmuir

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Metal pipes in industrial production are exposed to various corrosive ions. The combined action of these ions with oxygen in water causes corrosion and contamination of the metal pipes and equipment. In addition, metallic ions in water react with anions to form scale on the surface of the metal, which significantly reduces the service life of the metal and equipment, resulting in safety hazards. Waterborne coatings have attracted tremendous attention due to the less negative impact on the environment, but their practical applications are severely restricted by poor barrier properties and poor mechanical durability. Herein, the barrier properties of water-based coatings are successfully improved by adding functional slow-release nanofillers, and the fillers also endow the coating with excellent antiscaling properties. A functional slow-release nanofiller (lecithin/SiO 2 /HEDP) was prepared using HEDP (etidronic acid) as the scale inhibitor active material and SiO 2 as the carrier, combined with a phospholipid membrane with slow-release permeability. With the addition of slowrelease fillers, compared with the EP coating, the impedance modulus of composite coatings increases about 1 order of magnitude, the scale inhibition rate is as high as 80.7%, and the antiscaling life is double that of the coating without the phospholipid-coated filler. Thus, this study is expected to provide a new perspective for the preparation of new slow-release fillers and high-efficiency scale inhibitor coatings.

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“…The peaks at 2937 and 2843 cm −1 were attributed to the stretching vibration of methyl (–CH 3 ) and methylene (–CH 2 ) groups. [ 56 ] The peaks at 1614, 1506, and 1453 cm −1 can be attributed to the typical aromatic skeletal vibrations of benzene rings. [ 57 ] The peaks at 1360 and 1131 cm −1 showed the existence of syringyl units.…”

Section: Resultsmentioning

confidence: 99%

Construction of ecofriendly anticorrosive composite film ZnAl‐LDH by modification of lignin on AA 7075 surface

Cao

Zheng

Lin

2021

Materials & Corrosion

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In this study, an environment‐friendly composite ZnAl‐LDH film modified by the rich biomass lignin was prepared on AA 7075 surface successfully. A wide range of characterizations was carried out to obtain the morphology, composition, and structure of this composite film, including scanning electron microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy (FTIR), and so on. In addition, FTIR was used to investigate the complexing interaction between layered double hydroxide (LDH) and lignin. Finally, the corrosion protection ability of this composite film was evaluated by electrochemical impedance spectroscopy in an immersion period of 7 days in NaCl solutions. The results indicated that the ZnAl‐LDH film modified by lignin could provide effective corrosion protection for the underlying substrate in the whole immersion period, with almost one order of magnitude higher of the corrosion resistance in comparison with that in the case of the blank ZnAl‐LDH film after immersion of 7 days. Such results could provide inspiring insights into the development of composite inhibitors based on LDH and biomass.

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pH-Responsive Self-Healing Anticorrosion Coating Based on a Lignin Microsphere Encapsulating Inhibitor

Cited by 36 publications

References 37 publications

Fabrication of a pH-Sensitive Epoxy Nanocomposite Coating Based on a Zn-BTC Metal–Organic Framework Containing Benzotriazole as a Smart Corrosion Inhibitor

Fabrication of a pH-Sensitive Epoxy Nanocomposite Coating Based on a Zn-BTC Metal–Organic Framework Containing Benzotriazole as a Smart Corrosion Inhibitor

Novel Environmentally Friendly Waterborne Epoxy Coating with Long-Term Antiscaling and Anticorrosion Properties

Construction of ecofriendly anticorrosive composite film ZnAl‐LDH by modification of lignin on AA 7075 surface

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