Effect of polyaniline/montmorillonite content on the corrosion protection of epoxy coating

Zhang, Yingjun; Shao, Yawei; Shi, Qiumei; Wang, Yanqiu; Meng, Guozhe; Li, Ping

doi:10.1108/acmm-03-2015-1511

Cited by 9 publications

(4 citation statements)

References 28 publications

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“…Therefore in terms of pure epoxy coating, corrosive ions could reach the metal surface in a short time, leading to severe corrosion of the metal matrix. For the epoxy-CeO 2 coating, the coarse surface structure of the CeO 2 nano-llers can effectively prolong the paths of corrosive ions penetrating the coating to a certain extent, but with the increase of immersion time, the corrosive ions eventually reached the metal surface, leading to the failure of the corrosion resistance of the coating 27 . Although the pure CeO 2 nano ller is chemically stable, it can only act as a physical barrier and does not provide long-term corrosion protection.…”

Section: Protective Mechanism For Coatingsmentioning

confidence: 99%

Preparation of CeO 2 -PPy nanocomposites to improve the corrosion resistance of epoxy resin coatings

Feng

Liu

et al. 2023

Preprint

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Here, CeO2 was used as the sole oxidant for pyrrole polymerization via in-situ chemical oxidation, and polypyrrole (PPy) was grown on the CeO2 surface to form CeO2-PPy nanocomposites. The morphology of CeO2-PPy nanocomposites was observed using SEM. The electrochemical corrosion behavior of the coatings in 3.5 wt% NaCl solution was investigated through electrochemical impedance spectroscopy (EIS) measurements. After 40 days of immersion, the coating with CeO2-PPy nanocomposite fillers exhibited outstanding anti-corrosion performance, and the |Z|0.01 Hz value exceeded 108 Ω·cm2, which was one order of magnitude higher than of the pure epoxy coating. The enhanced corrosion protection was attributed to the complex passive film produced by the synergistic effect of PPy and cerium(Ⅲ) ions. The results showed that CeO2-PPy nanocomposites can be used as fillers for the corrosion protection of steel substrates.

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Section: Protective Mechanism For Coatingsmentioning

confidence: 99%

Preparation of CeO 2 -PPy nanocomposites to improve the corrosion resistance of epoxy resin coatings

Feng

Liu

et al. 2023

Preprint

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“…Buried steel pipes are exposed to a range of environmental reactions and changes, the most signi cant of which is corrosion (Zhang et al 2017). The kind or type of the surrounding formation, as well as the solution contained inside the pipeline have an impact on this.…”

Section: Ph In Rivers Statementioning

confidence: 99%

Corrosivity relationship for management of buried pipelines: A case study of Rivers state, Nigeria

Amadi

Ajienka

Akaranta

et al. 2022

Preprint

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Control and management of corrosion have always been the concern of oil and gas asset management teams due to the challenging outcomes of failed facilities in service due to corrosion. Corrosion has an impact on human safety, environmental safety, and productivity; thus, it is important to know how corrosive an environment is in order to make the best investment decisions for facilities that are prone to corrosion. There are various ways of identifying environmental corrosivity, but there is no distinct map or relation with combined soil pH and resistivity impact unique to an environment that suggests the corrosion severity of such an environment, which could be due to the complexities of variables involved in defining the extent of corrosivity. This research aims to create a corrosion map using the MATLAB computing environment for Rivers State, a mega oil-producing state in the Niger Delta, based on soil resistivity and pH across different parts of the state with ongoing oil and gas activities for the purpose of a quick look decision-making guide. To determine corrosivity, such a map should only need to identify the soil resistivity and pH of a certain site. The pilot test conducted using 40-point soil pH and resistivity data suggested that it is feasible to develop a unique corrosivity map for a region since the result showed an R-square value of 70.03%. However, possible constraints of the mapping process were discussed, as well as suggestions for a wider survey and improvement.

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“…(1) Increased barrier performance of coating. Generally, some layered materials, such as montmorillonite [9], hydrotalcites [10], glass [11], and graphene [12], have attracted intense research interest because their lamellar elements increase the lengths of the diffusion pathways of oxygen, water, and aggressive ions [13]. In recent years, two-dimensional graphene oxide (GO) has attracted extensive attention because of its high specific surface area, nanosheet layer, and excellent barrier ability [14,15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyaniline and Graphene Oxide Composite Powders on the Protective Performance of Epoxy Coatings on Magnesium Alloy Surfaces

Zhang

Xiao

Wen³

et al. 2022

Coatings

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Composite fillers are often used to improve the protective properties of coatings. To obtain a high protective performance of epoxy coatings for magnesium alloys, polyaniline (PANI) and graphene oxide (GO) composite powders were selected because of their corrosion inhibition and barrier performance, respectively. The paper mainly focuses on the effect of the preparation methods of the composite powders on the protective performance. PANI and GO composite powders were prepared by in situ polymerization and blending, respectively. First, the composite powder was characterized by X-ray diffractometer, Fourier transform infrared spectroscopy, and scanning electron microscopy. Then, the different composite powders and pure PANI powder were dispersed uniformly in epoxy resin, and the coating was prepared on the surface of the AZ91D magnesium alloy and studied by an electrochemical impedance test, adhesion strength test and physical properties test. The results show that the impedance value of the coating with the added PANI and GO composite powders by in situ polymerization was 4 × 109 Ω·cm2 and higher than that with the added pure PANI (4 × 109 Ω·cm2) and PANI and GO mixed powders (1 × 109 Ω·cm2) after 2400 h immersion in a 3.5% NaCl solution; the former also had better flexibility, ss impact resistance, and adhesion strength. Compared with the direct blending method, the PANI and GO polymerization powders can exert the shielding effect of GO and PANI corrosion inhibition better and achieve a better protective effect on the magnesium alloy.

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Effect of polyaniline/montmorillonite content on the corrosion protection of epoxy coating

Cited by 9 publications

References 28 publications

Preparation of CeO 2 -PPy nanocomposites to improve the corrosion resistance of epoxy resin coatings

Preparation of CeO 2 -PPy nanocomposites to improve the corrosion resistance of epoxy resin coatings

Corrosivity relationship for management of buried pipelines: A case study of Rivers state, Nigeria

Effect of Polyaniline and Graphene Oxide Composite Powders on the Protective Performance of Epoxy Coatings on Magnesium Alloy Surfaces

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