Corrosion behaviour of zinc in alcohol‐water solvents

Abdel‐Gaber, A. M.; Abdel-Rahman, Hanaa Hammam; Ahmed, A. M.; Fathalla, M.H.

doi:10.1108/00035590610678910

Cited by 9 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To avoid the corrosion of metals, many methods have been designed after analyzing the different forms of corrosion 2 . These methods include: inhibitors, electrical protection, surface coating, equipment design, and material selection 6 . Inhibitors are chemicals that, when applied in tiny amounts to corrosive conditions, inhibit electrochemical corrosion processes on metal surfaces 1 , 7 .…”

Section: Introductionmentioning

confidence: 99%

Investigation of Dracocephalum extract based on bulk and nanometer size as green corrosion inhibitor for mild steel in different corrosive media

Golshani

Arjmand

Amiri

et al. 2023

Sci Rep

View full text Add to dashboard Cite

In recent years, green corrosion inhibitors derived from natural plant resources have garnered much interest. In the present work, at first, we investigated the corrosion behavior of mild steel (st-37) in the presence, and absence of Dracocephalum extract based on bulk size as a corrosion inhibitor in two widely used acidic environments (0.5 M H2SO4, and 1.0 M HCl), at room temperature. Then, we used Dracocephalum extract based on nanometer size to reduce the optimal concentration of inhibitor, increase the corrosion resistant, and efficiency. Dracocephalum extract does not contain heavy metals or other toxic compounds, and also good characteristics such as low cost, eco-friendly, and widespread availability, make it suitable nature candidate as an environmentally safe green inhibitor. The anticorrosive behavior was assessed using electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PP). In all of the studies, the inhibitory efficiency (IE%) increased as the extract dose was increased. But by using nano extract, in addition to maintaining high efficiency, the amount of inhibitor was reduced significantly. The highest IE% is 94% at the best dose of nano extract (75 ppm), but the highest IE% is 89% at the best dose of the bulk extract (200 ppm) in H2SO4 solution. Also, for the HCl solution, the highest IE% is 88% at the best dose of nano extract (100 ppm), but the highest IE% is 90% at the best dose of the bulk extract (400 ppm), by polarization method. The PP results suggest that this compound has an effect on both anodic, and cathodic processes, and that it adsorbs on mild steel surface according to the Langmuir adsorption isotherm. Optical microscopy, scanning electron microscopy (SEM) analysis, and a solid UV–Visible reflection spectrum were used to investigate the alloys' surface morphology.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation of Dracocephalum extract based on bulk and nanometer size as green corrosion inhibitor for mild steel in different corrosive media

Golshani

Arjmand

Amiri

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Such results are in agreement with previous ones that showed that the amount of water and pH of many organic liquids are related to the corrosion of zinc. In fact, this metal is attacked rapidly when high content of water is present because of the lack of access to oxygen and due to the stabilization of corrosion products by water molecules [15,16]. Only in aluminum alloys (Figures 3 and 4), solution 4 was less corrosive than 3, probably due to the passivation of such materials.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Metallic Corrosion Caused by Alcohol Fuel and Some Contaminants

Monteiro

Ambrozin

Santos

et al. 2010

MSF

View full text Add to dashboard Cite

In the present work, it is evaluated the effect of water and other contaminants of alcohol fuel on the corrosion behavior of different materials, which can constitute vehicles, storage and transportation fuels systems. For such, 5 metallic materials (zamak, low-carbon steel, stainless steel, and two Al alloys) were chosen and 5 alcoholic solutions were prepared: anhydrous ethanol (AEAC; solution 1); hydrated ethanol (AEHC; solution 2); AEAC and water with some impurities (AEAC + 6 % “corrosive” water; solution 3); AEHC and water with some impurities (AEHC + 6 % “corrosive” water; solution 4); and, AEAC and tap water (AEAC + 6 % tap water; solution 5). The crevice corrosion was investigated in static immersion tests, which were carried out at 50 °C for 2 months. The evaluation of the corrosive process was carried out by visual inspection, weight loss, optic microscopy, and scanning electron microscopy (SEM). Also, some quality parameters of the alcoholic solutions (specific mass, alcoholic content, pH, and conductivity) was analyzed in order to determine the influence of corrosion of the materials on them. The results have shown that crevice corrosion of all materials mostly occurred in solutions 3-5, which had a high amount of water and impurities. Some corrosion rates in such solutions were 90-400 times higher than those obtained in AEAC and AEHC. Among the materials, zamak and carbon steel suffered severe corrosive attack. The physicochemical properties of alcoholic solutions employed in the tests also changed, mainly the increase of pH and conductivity was observed. Therefore, the results demonstrate that the quality control of alcohol fuel is essential in order to avoid the damage of engine parts and storage and transportation systems. Specially, water, sulphate, chloride and acetate content must be monitored.

show abstract