水溶性天然聚合果胶酸盐作为阴离子聚电解质缓蚀剂对铝在酸性介质中的缓蚀动力学

Kinetics of Corrosion Inhibition of Aluminum in Acidic Media by Water-Soluble Natural Polymeric Pectates as Anionic Polyelectrolyte Inhibitors.

作者信息

Hassan Refat M, Zaafarany Ishaq A

机构信息

Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.

Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah Al-Mukarramah 13401, Saudi Arabia Kingdom.

出版信息

Materials (Basel). 2013 Jun 17;6(6):2436-2451. doi: 10.3390/ma6062436.

DOI:10.3390/ma6062436

PMID:28809282

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5458939/

Abstract

Corrosion inhibition of aluminum (Al) in hydrochloric acid by anionic polyeletrolyte pectates (PEC) as a water-soluble natural polymer polysaccharide has been studied using both gasometric and weight loss techniques. The results drawn from these two techniques are comparable and exhibit negligible differences. The inhibition efficiency was found to increase with increasing inhibitor concentration and decrease with increasing temperature. The inhibition action of PEC on Al metal surface was found to obey the Freundlich isotherm. Factors such as the concentration and geometrical structure of the inhibitor, concentration of the corrosive medium, and temperature affecting the corrosion rates were examined. The kinetic parameters were evaluated and a suitable corrosion mechanism consistent with the kinetic results is discussed in the paper.

摘要

使用气体容量法和失重法研究了阴离子聚电解质果胶酸盐（PEC）作为水溶性天然聚合物多糖对盐酸中铝（Al）的缓蚀作用。从这两种技术得出的结果具有可比性，差异可忽略不计。发现缓蚀效率随缓蚀剂浓度的增加而提高，随温度的升高而降低。发现PEC对铝金属表面的缓蚀作用符合弗罗因德利希等温线。研究了缓蚀剂的浓度和几何结构、腐蚀介质的浓度以及温度等影响腐蚀速率的因素。评估了动力学参数，并讨论了与动力学结果一致的合适腐蚀机理。