Water-soluble carboxymethylchitosan used as corrosion inhibitor for carbon steel in saline medium

Macedo, Ruza Gabriela Medeiros de Araújo; Marques, Nívia do Nascimento; Tonholo, Josealdo; Balaban, Rosângela de Carvalho

doi:10.1016/j.carbpol.2018.10.081

Cited by 97 publications

(25 citation statements)

References 26 publications

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“…According to the latest stats, recycling CFRP with the chemical technique consumes 38.4 MJ/kg of energy, which is nearly equivalent to 10–30% of the total energy required to manufacture new fibers. Although [ 61 , 62 , 63 , 64 , 65 ] the chemical approach is feasible, the treatment temperature, solvents, and equipment have negative environmental consequences.…”

Section: Introductionmentioning

confidence: 99%

Carbon Fiber/PLA Recycled Composite

et al. 2022

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Due exceptional properties such as its high-temperature resistance, mechanical characteristics, and relatively lower price, the demand for carbon fiber has been increasing over the past years. The widespread use of carbon-fiber-reinforced polymers or plastics (CFRP) has attracted many industries. However, on the other hand, the increasing demand for carbon fibers has created a waste recycling problem that must be overcome. In this context, increasing plastic waste from the new 3D printing technology has been increased, contributing to a greater need for recycling efforts. This research aims to produce a recycled composite made from different carbon fiber leftover resources to reinforce the increasing waste of Polylactic acid (PLA) as a promising solution to the growing demand for both materials. Two types of leftover carbon fiber waste from domestic industries are handled: carbon fiber waste (CF) and carbon fiber-reinforced composite (CFRP). Two strategies are adopted to produce the recycled composite material, mixing PLA waste with CF one time and with CFRP the second time. The recycled composites are tested under tensile test conditions to investigate the impact of the waste carbon reinforcement on PLA properties. Additionally, thermogravimetric analysis (TGA), X-ray diffraction (XRD), and Fourier-transformed infrared spectroscopy (FTIR) is carried out on composites to study their thermal properties.

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Section: Introductionmentioning

confidence: 99%

Carbon Fiber/PLA Recycled Composite

et al. 2022

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“…In many cases, environmentally friendly, the so-called “green corrosion inhibitors” are being sought. 15,18−20,47 Such corrosion inhibitors have low ecotoxicity and could also be applicable for crude oil extraction. 16,20…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Steel Corrosion Inhibitors in an Environment of Ethanol–Gasoline Blends

et al. 2019

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Ethanol produced from renewable sources (i.e., bioethanol) is a first-generation biofuel that is currently being added as a biocomponent into gasolines. Mixtures of ethanol and gasoline are designated as ethanol–gasoline blends (EGBs). Ethanol has high polarity and moisture affinity, which considerably influence the properties of the resulting EGBs including their aggressiveness to many metallic and nonmetallic materials. The corrosion aggressiveness of EGBs can be minimized by suitable corrosion inhibitors. In this study, we tested three different corrosion inhibitors on mild steel in the environment of aggressive E10, E25, E60, and E85 fuels. The inhibitors tested were diethylene triamine (DETA) and two mixed inhibitors containing propargyl alcohol, dibenzyl sulfoxide, and octadecyl amine. To study the efficiency of the corrosion inhibitors, we used static and dynamic corrosion tests and electrochemical measurements including impedance spectroscopy and potentiodynamic polarization. The highest corrosion aggressiveness on mild steel was observed for the E60 fuel. The highest inhibitory efficiency was, for all the fuels tested, observed for the DETA inhibitor. For the DETA concentration of 100 mg·L –1 , the inhibitory efficiency in the E60 fuel was determined to be around 98%.

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“…[ 44 ] In this investigation, through fitting with different adsorption isotherm models, it can be found that the C/θ was linear with respect to C , and the fitting degree can reach 0.998, which indicated that the behavior of lignin–EPTAC molecules on the steel surface fits the Langmuir model. The results are shown in Figure 5 and the formula is as follows [ 45 ] :

\frac{C}{θ} normal= \frac{1}{{italicK}_{ads}} normal+ italicC,

…”

Section: Resultsmentioning

confidence: 99%

Construction of eco‐friendly corrosion inhibitor lignin derivative with excellent corrosion‐resistant behavior in hydrochloric acid solution

Gao

Zhao

Liu

et al. 2020

Materials & Corrosion

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Organic corrosion inhibitors from natural plant resources have received extensive attention in recent years. Herein, an eco-friendly corrosion inhibitor lignin-(2,3-epoxypropyl)trimethyl ammonium chloride (EPTAC) was successfully prepared by grafting EPTAC to kraft lignin. The inhibiting efficiency and its inhibition mechanism were investigated using electrochemical methods, adsorption thermodynamics analysis, and molecular dynamic simulation. The results showed that the lignin-EPTAC molecules formed a protective film on iron surface, resulting in an excellent inhibition efficiency of 97.80% at 100 mg/L concentration. The average surface roughness of steel samples was reduced to 26.6 nm from the original 99.3 nm. The adsorption of lignin-EPTAC molecules on the steel surface follows Langmuir adsorption isotherm model and was a physical-chemical process as well as an exothermic process of entropy reduction. This adsorption of lignin-EPTAC was a conjugated system dominated by benzene ring of lignin-EPTAC to form a chemical bond on the steel surface by conjugation, besides a positive interaction between the metal surface and the positively charged N ions in the head group of lignin-EPTAC.

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Water-soluble carboxymethylchitosan used as corrosion inhibitor for carbon steel in saline medium

Cited by 97 publications

References 26 publications

Carbon Fiber/PLA Recycled Composite

Carbon Fiber/PLA Recycled Composite

Efficiency of Steel Corrosion Inhibitors in an Environment of Ethanol–Gasoline Blends

Construction of eco‐friendly corrosion inhibitor lignin derivative with excellent corrosion‐resistant behavior in hydrochloric acid solution

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