Corrosion and Corrosion Protection Handbook

Schweitzer,

doi:10.1201/9781315140384

Cited by 11 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the experiment the corrosion product film will be formed, so the galvanic potential (E g ) is changed with time to more negative values. This time behavior is in accordance with what were noticed by other works [12,16,17]. However, Fig.…”

supporting

confidence: 93%

Galvanic Corrosion of Carbon Steel –Copper in Aerated H2SO4 Under Agitation Conditions

Hamad¹,

kader²,

Hasan³

2015

ETJ

View full text Add to dashboard Cite

Galvanic and free corrosion experiments on carbon steel-copper couple in 3% H 2 SO 4 in the presence of NaCl salts were carried out under different operating conditions. The effect of temperature, agitation speed, and air bubbling (O 2 concentration) on the free and galvanic corrosion was studied and discussed. The galvanic corrosion was investigated by both weight loss method and by determining the galvanic currents using zero resistance ammeter (ZRA). The results revealed that increasing temperature leads to increase the galvanic corrosion rate and also the free corrosion rate of each metal. Increasing agitation velocity enhanced the galvanic corrosion rate in a manner depending on temperature. The presence of air bubbling increased the corrosion rate and galvanic currents at low air pumping rate, while, at high pumping rate, air bubbling decreased the corrosion rate.

show abstract

supporting

confidence: 93%

Galvanic Corrosion of Carbon Steel –Copper in Aerated H2SO4 Under Agitation Conditions

Hamad¹,

kader²,

Hasan³

2015

ETJ

View full text Add to dashboard Cite

show abstract

“…In addition the presence quartz and some clay materials explain the different components that characterized the excavation area of this statuette [13] composed of sandy soil [14]. This result was also confirmed by SEM results [15]. Moreover, the investigation revealed the heterogeneity of the surface corrosion layers of the statuette and partly presence of voids and cavities [16].…”

Section: Discussionsupporting

confidence: 65%

Corrosion Characteristics and Conservation of Ancient Egyptian Bronze Osiris Statuette From Al-Arish Museum

Mahmoud¹

2022

Egyptian Journal of Archaeological and Restoration Studies

View full text Add to dashboard Cite

A bronze statuette in the form of Osiris is dating back to the late period. It was manufactured by casting method. The statuette in the Osiris position shows the wand, the sceptre and the royal crown and has a cobra snake. The hooked chin and facial details reveal a calm smile. On the outside, the statuette suffered from deterioration phenomena, for example different layers of soil mixed with sand and corrosion products on the statuette's surface. Bronze disease appears in separate areas of the statuette. Various examinations and analyses were performed on the samples that represent the places of damage on the statuette. The layers on the statuette surface were studied using stereo microscope examination, polarizing microscope and scanning electron microscope with energy dispersive X-ray analysis (SEM-EDX). Examinations show that the surface layers consist of clay minerals, sand and corrosion products in various colors. The mineral composition of the samples was determined by X-ray diffraction analysis. The analysis revealed the presence of cuprite, atacamite as Corrosion products, in addition to quartz. Calcifications have been removed using appropriate tools such brushes and blunt scalpels. Treatment processes of the bronze statuette include mechanical and chemical cleaning in addition to apply benzotriazole inhibitor by 3%. A protective layer of paraloid B 82 by 3% was applied. Finally, the bronze statuette was displayed in Al-Arish museum.

show abstract

“…Anodic inhibitors block the anodic reaction (oxidation of Fe to Fe 2+ ) by a creation of a barrier coating on anodic sites. They are adsorbed on the metal surface forming a protective film, so reducing the corrosion current and increasing the corrosion potential [13,[26][27][28][29][30]. However, differences in both the anodic and cathodic Tafel slopes can be observed, suggesting that, apart from blocking the anodic reaction, the cathodic reaction is also affected by the presence of these compounds.…”

Section: Mild Steel Corrosion Inhibition Properties Of P-hexoxy Coumarate Based Monomeric Ionic Liquidsmentioning

confidence: 99%

Cation Effect in the Corrosion Inhibition Properties of Coumarate Ionic Liquids and Acrylic UV-Coatings

et al. 2020

View full text Add to dashboard Cite

Chromate free corrosion inhibitors are searched for to mitigate the economic loss caused by mid-steel corrosion. Here, we show metal-free organic inhibitors having free coumarate anions that can be used either as direct corrosion inhibitors or incorporated into a polymer coating obtained by UV-curing. Four different ionic liquid monomers and polymer coatings with hexoxycoumarate anion and different polymerizable counter cations were investigated. Potentiodynamic polarization, electrochemical impedance spectroscopy, and surface analyses have verified their corrosion inhibition performance on a mild steel AS1020 surface. In the case of the coumarate ionic liquid monomers, the most promising inhibitor is the one coupled with the ammonium cation, showing an inhibition efficiency of 99.1% in solution followed by the imidazolium, pyridinium, and anilinium. Next, the ionic liquid monomers were covalently integrated into an acrylic polymer coating by UV-photopolymerization. In this case, the barrier effect of the polymer coating is combined with the corrosion inhibitor effect of the pendant coumarate anion. Here, the best polymer coatings are those containing 20% imidazolium and pyridinium cations, presenting a greater impedance in the EIS (Electrochemical Impedance Spectroscopy) measurements and less evidence of corrosion in the scribe tests. This article shows that the cationic moiety of coumarate based ionic liquids and poly(ionic liquid)s has a significant effect on their excellent corrosion inhibition properties for a mild steel surface exposed to aqueous chloride solutions.

show abstract

Corrosion and Corrosion Protection Handbook

Cited by 11 publications

References 0 publications

Galvanic Corrosion of Carbon Steel –Copper in Aerated H2SO4 Under Agitation Conditions

Galvanic Corrosion of Carbon Steel –Copper in Aerated H2SO4 Under Agitation Conditions

Corrosion Characteristics and Conservation of Ancient Egyptian Bronze Osiris Statuette From Al-Arish Museum

Cation Effect in the Corrosion Inhibition Properties of Coumarate Ionic Liquids and Acrylic UV-Coatings

Contact Info

Product

Resources

About