Investigation of the Anticorrosive Activity of Piper divaricatum Essential Oil on Steel in 1 M HCl

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2024-10-29 DOI:10.1021/acsomega.4c0726910.1021/acsomega.4c07269

Heloise Leal Monteiro, Alcy Favacho Ribeiro, Mewry Joyce Correia Modesto, Eloisa Helena de Aguiar Andrade, José Antonio da Silva Souza, Jordan Del Nero, Arthur de Farias Silva Rente, Rodrigo Della Noce, José Pio Iúdice de Souza, Carlos Alberto Brito da Silva Jr*, Marcos Vinícius da Silva Paula and Ana Aurea Barreto Maia,

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引用次数: 0

Abstract

Piper divaricatum essential oil (PDEO), extracted from plants of the Brazilian Amazon, was investigated for the first time as a novel green or eco-friendly inhibitor for steel corrosion in 1 M HCl at 25 °C. Our electrochemical studies demonstrate that for different PDEO concentrations, lower E_corr and i_corr values were obtained. The influence of the oil concentration on corrosion inhibition, 0.5–4 g/L, was determined for 1 and 7 days of immersion. The corrosion rate (CR) and inhibition efficiency (IE) were determined by mass loss. The steel surface in the presence and absence of oil was investigated by scanning electron microscopy (SEM). The main PDEO compounds, determined by gas chromatography–mass spectrometry (GC-MS), were methyleugenol (20.68%) and eugenol (15.42%). The CR and IE for 2 g/L PDEO exhibited an optimal value of 4.31 mm/year and 98.3% for 7 days of immersion, respectively. The surface with 2 g/L oil for 7 days exhibited a less rough morphology, which was attributed to the corrosion inhibitory effect of PDEO. In addition, the PDEO adsorption process on the steel surface obeyed the Langmuir isotherm model. Negative values found for free standard energy ( $Δ G_{ads}^{°}$ < 0 kJ·mol^–1) were attributed as a favorable process, i.e., an indicative of physisorption and chemisorption between the PDEO components and the steel surface. Our results reveal that the PDEO has a promising character for anticorrosive steel applications and metal coating in industries.

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研究胡椒精油在 1 M HCl 溶液中对钢铁的防腐活性

我们首次研究了从巴西亚马逊植物中提取的胡椒精油（PDEO），并将其作为一种新型绿色或生态友好型抑制剂，用于抑制 25 °C 下 1 M HCl 中的钢腐蚀。我们的电化学研究表明，不同浓度的 PDEO 可获得较低的 Ecorr 和 icorr 值。浸泡 1 天和 7 天后，测定了油浓度（0.5-4 克/升）对缓蚀作用的影响。腐蚀速率（CR）和抑制效率（IE）是通过质量损失确定的。通过扫描电子显微镜（SEM）对有油和无油情况下的钢表面进行了研究。通过气相色谱-质谱（GC-MS）测定，主要的 PDEO 化合物为甲基丁香酚（20.68%）和丁香酚（15.42%）。浸泡 7 天后，2 克/升 PDEO 的 CR 和 IE 的最佳值分别为 4.31 毫米/年和 98.3%。在 2 克/升油中浸泡 7 天的表面呈现出较不粗糙的形态，这归因于 PDEO 的缓蚀作用。此外，PDEO 在钢表面的吸附过程符合 Langmuir 等温线模型。自由标准能（ΔGads° < 0 kJ-mol-1）的负值被认为是一个有利的过程，即表明 PDEO 成分与钢表面之间存在物理吸附和化学吸附。我们的研究结果表明，PDEO 在防腐钢材应用和工业金属涂层方面具有广阔的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567