Corrosion inhibition of curcuma and saffron on A106 Gr B carbon steel in 3% NaCl medium

Abstract

Purpose Electrochemical measurements were used to characterize the inhibiting effectiveness of Curcuma and saffron, considered as green inhibitors in a corrosive environment 3% NaCl on A106 Gr B carbon steel. Design/methodology/approach This study/paper aims to polarization and potentiodynamic impedance spectroscopy techniques were performed on A106 Gr B carbon steel in the 3% NaCl environment only and containing various concentrations of Curcuma and Saffron (0.005, 0.01, 0.02, 0.04, g/L) after 30 min of immersion; these measures were taken at a temperature of (298 ± 1)K. A voltlab PGZ 301 assembled by A 106 Gr B carbon steel working electrode, a platinum counter electrode (CE) and a saturated calomel electrode as the reference electrode were used in the experiment. In this research, potentiodynamic polarization and electrochemical impedance spectroscopy were used. Findings The inhibition efficiencies increased with increase in the concentrations of the inhibitor but decreased with rise in temperature. The obtained results show an optimal efficiency with 0.04 g/L which are ordered of 78 and 96 per cent successively for the two inhibitors. Curcuma and saffron acts as a mixed type inhibitor. Adsorption of the inhibitor molecules corresponds to Langmuir adsorption isotherm. Mechanism of inhibition was also investigated by calculating the thermodynamic and activation parameters like (ΔG), (Ea), (ΔHa) and (ΔSa). The inhibitor molecules followed physical adsorption on the surface of carbon steel. Originality/value The present trend in research on environmental friendly corrosion inhibitors is concentrating on products of natural origin due principally to non-toxicity and eco-friendliness. Among these natural products are curcuma and saffron.

Enhancement of corrosion resistance of the cooling systems in desalination plants by green inhibitor

“…However, at TOE concentration higher than 200 mg L −1 , the decrease tends to stabilize. Similar behavior was observed for corrosion inhibition using berberine extracted from Coptis chinensis 56 , berberine dye 57 , spices extract (curcuma, safran) 17 , acacia leaves (Acacia cyanophylla) extract 58 , irbesartan 43 . In the case of coffee husk extract the variations in the CPE were much less marked 48 .…”

“…Increasing the concentration of TOE drastically increases the charge transfer www.nature.com/scientificreports www.nature.com/scientificreports/ resistance (by a factor close to 11) while the CPE strongly decreases (from 5.2 to 0.3 µF cm −2 ). This strong decrease is explained by the increase in the thickness of the electrical double layer (due to the surface sorption of TOE extract compounds) 52,53 and/or the decrease in local dielectric constant 17,48,54,55 .…”

“…Alternative bio-sourced corrosion inhibitors have recently received a great attention from research community because of the abundance and low toxicity of these natural products. These natural corrosion inhibitors are mainly extracted from plants [9][10][11][12][13][14][15][16][17][18][19][20] and seaweed biomass [21][22][23] .…”

Corrosion mitigation of mild steel in hydrochloric acid solution using grape seed extract

“…Many plant extracts, including Lagerstroemia speciosa leaf 5 , Persian liquorice 6 , Lavandula angustifolia 7 , Thymus vulgaris 8 , Juglans regia green fruit shell 9 , Saraca ashoka 10 , Matricaria recutita 11 , Tamarindus indiaca 12 , Thymus vulgaris 8 , Sunflower seed hull 13 , Longan seed/peel 14 , Allium sativum 15 , Salvia officinalis 16 , Bambusa arundinacea leaves 17 , Eucalyptus leaf 18 , Carum carvi 19 , Thymus algeriensis 20 , Tagetes erecta 21 , Esfand seed 22 , Turmeric 23 , Dacryodis edulis 24 , Eriobotrya japonica lindl 25 , Egyptian licorice 26 , Neem 27 , Saffron 28 , ginger 29 , Valeriana wallichii 30 , Menthe pulegium 31 , have been reported to have corrosion inhibition performance.…”

Corrosion inhibition of levofloxacin and Ce(NO3)3for AA2024-T4 in 3.5% NaCl

“…Although corrosion inhibitors can reduce the corrosion rate of metals, some of them are toxic or harmful to the environment [4,5]. The green, safe, non-toxic and environmentally-friendly corrosion inhibitors are therefore highly desirable [6][7][8][9]. Among green corrosion inhibitors, rare earth elements are inorganic inhibitor, which cover the protected surface mechanically as a dense barrier against corrosive agents [10].…”