Effect of henna and rosemary extracts on the corrosion of 304L stainless steel in 3.5% NaCl solution

Pourriahi, Mehdi; Nasr‐Esfahani, Mojtaba; Motalebi, Abolfazl

doi:10.3103/s1068375514060088

Cited by 14 publications

(8 citation statements)

References 16 publications

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“…Pourriahi et.al. 21 studied inhibitive action of rosemary and henna extracts for stainless steel corrosion in saline media, comparatively. Adsorption and inhibition mechanisms were comprehensively characterized using surface analysis, weight loss measurement, polarization analysis, and electrochemical techniques.…”

Section: Introductıonmentioning

confidence: 99%

An alternative antioxidant for sulfur-vulcanized natural rubber: Henna

Öncel

Kurtoglu

Karaagac

2018

Journal of Elastomers & Plastics

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Oxidative aging of natural rubber (NR) leads to the deterioration in the physical and mechanical properties. Using various antioxidants during compounding is a common way to improve the aging resistance of NR. The most widespread used antioxidants are phenolic and amine-based synthetic antioxidants and 2,2,4-trimethyl-1,2-dihydroquinoline in rubber industry. However, synthetic antioxidants cause some environmental problems during their production and tend to be replaced by natural alternatives. In this study, henna has been evaluated as a natural antioxidant in NR-based rubber compounds for efficient and conventional sulfur vulcanization systems. Performance of henna was evaluated in terms of rheological, mechanical, aging, and temperature scanning stress-relaxation properties of the compounds. It has been concluded that henna could be used as an alternative antioxidant for sulfur vulcanization of natural rubber matrix, compensating little deteriorations in vulcanizate properties. Short- and long-term performances of henna were also found to be related to vulcanization system.

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Section: Introductıonmentioning

confidence: 99%

An alternative antioxidant for sulfur-vulcanized natural rubber: Henna

Öncel

Kurtoglu

Karaagac

2018

Journal of Elastomers & Plastics

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“…Here, we introduce a self-protecting polymer coating with a microencapsulated anticorrosion agent distributed throughout the coating. Lawsone (2-hydroxy-1,4-napthoquinone), an extract of the henna plant, has known anticorrosive properties based on the chelation of metal cations. − The metal complexes formed (Figure ) adsorb onto the underlying metal surface and form a protective barrier. Lawsone is safe for humans and the environment and is used for recreational tattoos and skin markings in medical procedures. , Lawsone has been previously incorporated into a corrosive solution to provide corrosion protection of a substrate but not encapsulated.…”

Section: Introductionmentioning

confidence: 99%

Self-Protecting Epoxy Coatings with Anticorrosion Microcapsules

Odarczenko

Thakare

et al. 2018

ACS Omega

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The corrosion of steel substrates causes damage that is costly to repair or replace. Current protective coatings predominately rely on environmentally harmful anticorrosive agents and toxic solvents to protect the underlying substrate. The use of lawsone (2-hydroxy-1,4-napthoquinone) together with a water-based epoxy coating provides an environmentally friendly alternative for common protective coatings. Microencapsulated lawsone embedded in an epoxy coating allows the anticorrosive agent to remain dormant until released by damage and delivered directly onto the steel substrate. UV–vis analysis confirms successful encapsulation of lawsone in a polyurethane shell wall and reveals up to 8 wt % lawsone in the capsule cores. Uniform dry film thickness and inflicted damaged are verified with ultrasound and optical microscopy. Visual and electrochemical analysis demonstrates that this self-protective scheme leads to a 70% corrosion inhibition efficiency in a neutral salt water solution.

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“…Where Org(sol) and Org(ads) are the organic compounds present in the aqueous solution and the organic molecules adsorbed onto the metal surface, x is the ratio indicating the number of water molecules that are substituted by one organic adsorbate molecule [58].…”

Section: Electrochemical Impedances Spectroscopy (Eis)mentioning

confidence: 99%

“…Generally, the level of the adsorption's standard free energy -around -20 kJ mol -1 or less negative -can reveal that there is an electrostatic interaction between the inhibitor and the charged metal surface (physical adsorption); those around -40 kJ mol -1 or less indicates a coordination between the lone pair of O atoms or 𝜋-electrons cloud and the metallic surface (chemical adsorption) [58,63]. Therefore, the calculated value of ΔG 0 ads is between -40 kJ mol -1 and -20 kJ mol -1 , indicating that the inhibitor adsorption on the copper surface occurred by a mixed process and involves both physisorption and chemisorption [25,64].…”

Section: Electrochemical Impedances Spectroscopy (Eis)mentioning

confidence: 99%

Oil Extraction From Spent Coffee Grounds As Green Corrosion Inhibitor for Copper in 3 wt% NaCl Solution

ROUIN,

ABDELMOULEH,

MALLAH

et al. 2023

Preprint

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This work aims to follow the corrosion behavior of copper in 3 wt% NaCl solution in the presence of a bio-oily extract. Spent coffee grounds (SCG), a highly recyclable and usable biomass - often thrown away and becoming a serious threat to the environment - , has a fraction of oils (12%) that we have opted to use as a corrosion inhibitor for copper. The extraction was carried out using n-hexane as the solvent for the decoction. The oily fraction was analyzed by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Potentiodynamic polarization measurements have revealed SCG extract acts as a cathode-type inhibitor for copper in saline media, mainly preventing the diffusion of oxygen molecules toward the substrate. As the extract concentration increased, the inhibition efficiency has improved as well, reaching 95.78 % with 0.6 g/L of SCG extract. The obtained results by electrochemical impedance spectroscopy (EIS) are in accordance with the order of inhibitory efficiency obtained by potentiodynamic polarization. We have found that the SCG extract adsorption process on copper surface is spontaneous and complies with Langmuir isotherm.

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Effect of henna and rosemary extracts on the corrosion of 304L stainless steel in 3.5% NaCl solution

Cited by 14 publications

References 16 publications

An alternative antioxidant for sulfur-vulcanized natural rubber: Henna

An alternative antioxidant for sulfur-vulcanized natural rubber: Henna

Self-Protecting Epoxy Coatings with Anticorrosion Microcapsules

Oil Extraction From Spent Coffee Grounds As Green Corrosion Inhibitor for Copper in 3 wt% NaCl Solution

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