A Revisit to the Corrosion Inhibition of Aluminum in Aqueous Alkaline Solutions by Water-Soluble Alginates and Pectates as Anionic Polyelectrolyte Inhibitors

Abstract

The corrosion behavior of aluminum (Al) in alkaline media in presence of some natural polymer inhibitors has been reinvestigated. The inhibition action of the tested inhibitors was found to obey both Langmuir and Freundlich isotherms models. The inhibition efficiency was found to increase with increasing the inhibitors concentration and decrease with increasing the temperature, suggesting physical adsorption mechanism. Factors such as the concentration and geometrical structure of the inhibitor, concentration of the corrosive medium, and temperature affecting the corrosion rates were examined. The kinetic parameters were evaluated, and a suitable corrosion mechanism consistent with the kinetic results obtained is suggested and discussed.

Growth of gold nanoparticles using aluminum template via low-temperature hydrothermal method for memory applications

“…4a. The Al peak disappeared after the hydrothermal reaction because of the acidic precursor; the pH of the hydrothermal precursor was similar for all sample, that is, the Al thin film dissolved at approximately pH 2, as observed by Hassan et al [32]. Thus, only AuNPs formed after the hydrothermal reaction.…”

A promising methyl ester of pectic acid polysaccharide in biomedicine and pharmaceutics applications: Oxidation of methyl ester of pectic acid by alkaline hexacyanoferrate(III). A kinetic and mechanistic orientation

“…In addition, it used in oral, nasal, and vaginal preparations, which shows positive results in the cholesterol regulation and anticancer drugs . Recently, it has been successfully applied as inhibitor to prevent corrosion of some metals . PEC has certain advantages due to its nontoxicity, low‐cost, and easy availability.…”

“…[3][4][5][6] Recently, it has been successfully applied as inhibitor to prevent corrosion of some metals. 7,8 PEC has certain advantages due to its nontoxicity, low-cost, and easy availability.…”

Recent developments in sustainable corrosion inhibitors: design, performance and industrial scale applications

“…The protection effectiveness of the starch modified with sodium dodecyl sulfate (DS) and cetyltrimethyl ammonium bromide (CMAB) was reported using chemical and electrochemical techniques [201]. Later on several other studies dealing with the anticorrosive effect of starch [202][203][204], pectin [205][206][207][208][209][210], dextrin & cyclodextrin [13,[211][212][213][214][215], pectate [216,217], algenates [218,219] and exudate gums [220][221][222][223][224][225] are reported for metals and alloys in different electrolytes. Synergistic effect of halide ions is also reported for different classes of biopolymers [226][227][228][229].…”