樟树籽提取物在5%硫酸中对A3碳钢的缓蚀性能影响
Corrsion Inhibition of Cinnamomum Camphora Seeds Extract for A3 Steel in 5% H2SO4 Solution
摘 要
采用失重法、极化曲线法、电化学阻抗谱研究了25 ℃时樟树籽提取物(CCSE)在5% H2SO4溶液中对A3碳钢的缓蚀性能。结果表明, 樟树籽提取物为15 g/L时, 在25 ℃时缓蚀率达84.01%; 因其在钢铁表面吸附起缓蚀作用, 吸附模型符合Langmuir吸附等温式; 运用相关公式, 求出ΔG的值在-20~0 kJ/mol之间, 属于物理吸附; 并讨论了缓蚀机理。极化曲线表明樟树籽提取物是一种混合型缓蚀剂。
硫酸
缓蚀率
缓蚀机理
cinnamomum camphora seeds extract
H2SO4
inhibition efficiency
inhibitive mechanism
Abstract
The inhibition of cinnamomum camphora seeds extract(CCSE) on A3 steel in 5% H2SO4 solution at 25 ℃ was studied by methods of weight loss、potentiodynamic polarization curves、electrochemical impendance spectroscopy (EIS).The results showed that CCSE was a good corrosion inhibitor, and maximum inhibition efficiency was up to 84.01% at a concentration of 15 g/L at 25 ℃.The inhibitive mechanism was proposed from the adsorption viewpoint and the adsorption of CCSE on A3 steel surface obeys Langmuir adsorption isotherm.The experimental data were treated with related equations to calculate the adsorption Gibbs free energy ΔG, and the inhibitive mechanism was discussed in detail according to the parameters.The value of ΔG was between -20 kJ/mol and 0 kJ/mol, so its adsorption was physical adsorption.Polarization curves reveal that CCSE behaves as a mixed-type corrosion inhibitor.
中图分类号 TG174.42
所属栏目 试验研究
基金项目 福建省社会发展重点项目(2012Y0018)
收稿日期 2013/12/13
修改稿日期
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备注王瑛(1965-), 副研究员, 博士, 从事精细化学品合成、性能评价及应用研究, 工业水处理技术应用及工程实施, 中央空调水处理及工程实施, 金属配合物的合成及构效研究,
引用该论文: YOU Fei-ming,WEI Guo-sheng,DAI Ming,YUE Shuai,WANG Ying. Corrsion Inhibition of Cinnamomum Camphora Seeds Extract for A3 Steel in 5% H2SO4 Solution[J]. Corrosion & Protection, 2014, 35(10): 1016
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参考文献
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【2】杨小凤, 马广恩. 栾树种子的化学成分研究[J]. 药学学报, 2000, 35(4): 279-283.
【3】龚敏. 桉叶油盐酸酸洗缓蚀剂的开发[J]. 腐蚀与防护, 2007, 27(11): 576-578.
【4】孙建厅, 何平, 王薇, 等. 八角金盘叶和香樟叶提取物对碳钢的缓蚀作用[J]. 绵阳师范学院学报, 2011, 29(11): 55-59.
【5】LEBRINI M, ROBERT F, BLANDINIERSS P A, et al. Corrosion inhibition by Isertia coccinea plant extract in hydrochloric acid solution[J]. International Journal of Electrochemical Science, 2011, 6(7): 2443-2460.
【6】NOOR E A. Potential of aqueous extract of Hibiscus sabdariffa leaves for inhibiting the corrosion of aluminum in alkaline solutions[J]. Journal of applied electrochemistry, 2009, 39(9): 1465-1475.
【7】FU J, PAN J, LIU Z, et al. Corrosion inhibition of mild steel by benzopyranone derivative in 1.0 M HCl solutions[J]. Int J Electrochem Sci, 2011, 6: 2072-2089.
【8】SOLOMON M M, UMOREN S A, UDOSORO I I, et al. Inhibitive and adsorption behaviour of carboxymethyl cellulose on mild steel corrosion in sulphuric acid solution[J]. Corrosion Science, 2010, 52(4): 1317-1325.
【9】TAO Z, HE W, WANG S, et al. A study of differential polarization curves and thermodynamic properties for mild steel in acidic solution with nitrophenyltriazole derivative[J]. Corrosion Science, 2012, 60(6): 205-213.
【10】付惠, 李向红, 肖旭萍. 麻竹竹叶提取物在酸性介质中对冷轧钢的缓蚀作用[J]. 腐蚀与防护, 2009, 30(8): 548-550.
【11】黄艳仙, 蔡洁, 周建敏. 白玉兰叶提取物对A3钢在酸性介质中缓蚀性能的研究[J]. 应用化工, 2010, 39(4): 538-540.
【12】ABDELGABER A, KHALIL N, ElFETOU A A. The dissolution mechanism of steel in inorganic acids[J]. Anti-Corrosion Methods and Materials, 2003, 50(6): 442-447.
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