枇杷叶提取物在硫酸溶液中对低碳钢的缓蚀作用。
Corrosion inhibition of mild steel in sulfuric acid solution by loquat (Eriobotrya japonica Lindl.) leaves extract.
机构信息
School of Chemical and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, 643000, China.
Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong, 643000, China.
出版信息
Sci Rep. 2018 Jun 14;8(1):9140. doi: 10.1038/s41598-018-27257-9.
The inhibition performance and mechanism of loquat leaves extract (LLE) for the corrosion of mild steel in 0.5 M HSO were investigated using weight loss method, electrochemical measurements and scanning electron microscope (SEM). The results revealed that LLE acted as a modest cathodic inhibitor, its inhibition efficiency increased with the concentration of LLE and reached a maximum value of 96% at the 100% V/V concentration, but decreased with incremental temperature. Besides, it was found that the adsorption of LLE on steel surface obeyed Langmuir adsorption isotherm, and then the thermodynamic and kinetic parameters were further determined accordingly. Furthermore, LLE was preliminarily separated by pH-gradient sedimentation and the synergistic inhibition between the isolates was investigated.
采用失重法、电化学测试和扫描电子显微镜（SEM）研究了枇杷叶提取物（LLE）在 0.5M HSO 中对低碳钢腐蚀的抑制性能和机理。结果表明，LLE 作为一种中等阴极抑制剂，其抑制效率随 LLE 浓度的增加而增加，在 100%V/V 浓度下达到最大值 96%，但随温度的升高而降低。此外，发现 LLE 在钢表面的吸附符合 Langmuir 吸附等温线，进而进一步确定了热力学和动力学参数。此外，还通过 pH 梯度沉淀初步分离了 LLE，并研究了分离物之间的协同抑制作用。
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