A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl
A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl
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DOI：
10.1080/17518253.2017.1388446
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发表时间：
2017-10
影响因子：
6.6
通讯作者：
Mehdi Honarvar Nazari;M. Shihab;Ling Cao;E. Havens;Xianming Shi
中科院分区：
文献类型：
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作者：
Mehdi Honarvar Nazari;M. Shihab;Ling Cao;E. Havens;Xianming Shi
摘要：以牡丹叶为原料，采用零废弃物化学/生物工艺制备液体混合物。通过电化学测量，研究了不同浓度牡丹叶萃取液（0-3 vol.%, PLS0-3）在3.5 wt.% NaCl溶液中对C1010碳钢的缓蚀作用。化学分析揭示了该抑制剂的主要成分。采用表面分析和水接触角测量方法研究了受影响钢表面的特性。采用PM3法进行半经验计算，找出了PLS的分子结构与抑制效果之间的关系，该抑制剂具有较长的稳定性，其主要有效成分为C19H27N4O10P和C17H16N3O9P，它们吸附在钢表面，阻断阴极活性位点，使表面疏水，降低表面自由能，促进钝化层的形成。实验确定的抑制效率与理论计算的PLS性能之间存在良好的相关性
ABSTRACT A liquid mixture was developed from waste peony leaves through a zero-waste chemical/biological process. The inhibition effect of different concentrations of peony leaves derived solution (0–3 vol.%, PLS0-3) on C1010 carbon steel in 3.5 wt.% NaCl was investigated over time using electrochemical measurements. Chemical analyses were performed to reveal the main compounds of this inhibitor. Surface analyses together with water contact angle measurements were employed to study the characteristics of the steel surface affected. Semi-empirical calculations with PM3 method were used to find the relationship between molecular structure and inhibiting effect of PLS. The inhibitor was stable over time and its main active ingredients were C19H27N4O10P and C17H16N3O9P that adsorb onto the steel surface, block cathodic active sites, make the surface hydrophobic, decrease the surface free energy, and facilitate the formation of a passive layer. A good correlation was found between experimentally determined inhibition efficiency and theoretically calculated properties of PLS. GRAPHICAL ABSTRACT