Hydrogenated Dimer Acid as a Corrosion Inhibitor for Lead Metal Substrates in Acetic Acid

Abstract

The surface characteristics of a lead carboxylate coating induced on a lead substrate using a dimer acid are discussed together with its effectiveness against acetic acid corrosion. Thermogravimetric analysis and differential scanning calorimetry were used to examine the thermal properties of the hydrogenated dimer acid and its corresponding sodium salt. Scanning electron microscopy with energy-dispersive spectroscopy, X-ray photoelectron spectroscopy and infrared spectroscopy were used to visualize and characterize the deposited coatings on the lead substrate. Both the free dimer acid and the corresponding sodium salt formed a protective layer of lead carboxylate complexes through a reaction with the lead substrate. Single-sine electrochemical impedance spectroscopy and potentiodynamic polarization measurements of the bare and coated samples assessed the corrosion resistance of the coatings. Under the corrosive acetic acid test conditions, the lead-dimer-coated samples corroded more slowly than the bare lead.

The Inhibition Effect of Sodium Glutarate towards Carbon Steel Corrosion in Neutral Aqueous Solutions

“…This is not possible to observe in Figure 8; however, an indirect indication that the intensity of the C 1s signal increases in treated samples is the observation that the signal to noise ratio in Figures 8(c to carbonaceous contamination is the fact that the relative contribution of oxidized carbon subpeaks is higher compared to that observed for the native oxide film. In fact, deconvolution of the C 1s peak in Figure 8(c) resulted in 3 subpeaks: the subpeak at a binding energy (BE) ∼284.7 eV can be assigned to the carbon atoms in the saturated chains of the dicarboxylic acid, the one around 285.4 eV to the carbon atom attached to the carboxyl carbon (C-COOX), and the peak at BE ∼288.3 eV to the carboxylate (O-C=O − ), in agreement with results published in related literature [29][30][31].…”

The Use of a Saturated Long Carbon Chain Sodium Monocarboxylate for the Corrosion Inhibition of Lead Objects in Atmospheric Conditions and in Acetic Acid Corrosive Solutions

“…This concentration of the acetic acid is higher than that it was recorded in the wooden show cases or in the wind chests of the organ pipe [23]. TBAB is not aggressive to lead metal, and it is used as a supporting electrolyte to prevent the migration current and decrease the iR drop of the cell [23,24]. Coupons with dimensions 12.6 mm diameter and 2 mm thickness were made from 99.95% lead sheet (Goodfellow Ltd., Cambridge, UK).…”

“…The acetic acid corrosive solution (pH = 3.5) is a 0.1 M tetrabutylammonium bromide (TBAB) (purity > 99%, Merck, Darmstadt, Germany) containing 5 µg•L −1 acetic acid (98-99%, Vel NV, Leuven, Belgium). This concentration of the acetic acid is higher than that it was recorded in the wooden show cases or in the wind chests of the organ pipe [23]. TBAB is not aggressive to lead metal, and it is used as a supporting electrolyte to prevent the migration current and decrease the iR drop of the cell [23,24].…”

Hierarchical porous carbon@PbO1-x composite for high-performance lead-carbon battery towards renewable energy storage

“…XPS survey spectrum corroborates the existence of C, O and Pb elements, which matches well with the EDS result. High-resolution spectra of Pb 4f centering around 138.6 eV and 143.4 eV can be differentiated into two pair of peaks of Pb (136.9 eV and 141.7 eV) and PbO (138.6 eV and 143.4 eV) [49][50][51][52]. Due to the deficiency of oxygen in PbO, the above lead-carbon composite is named as RHHPC@PbO 1-x composite.…”