摘要
通过开路电位测量法、动电位极化曲线法和电化学阻抗谱法研究了表面活性剂聚乙二醇对A30碳钢的缓蚀作用,初步推测了其缓蚀机理.分别选取聚合度为600、2000、4000、6000的四种聚乙二醇进行实验,结果表明,聚乙二醇对碳钢的最高缓蚀率接近90%.聚乙二醇分子量对缓蚀作用有明显影响,相同浓度时聚合度越大,缓蚀性能越强.三种方法得到的结果具有同一性.
The corrosion inhibition effect of polyethylene glycols （PEGs） on carbon steel was evaluated by （corrosion potential） OCP, dynamic potential polarization and electrochemical impedance spectroscopy （EIS） techniques. Different molecular weights （ 600, 2 000, 4 000, and 6 000） of PEGs were selected to compare their inhibition efficiency. Results showed that PEGs do have inhibition efficiencies on carbon steel and the best inhibition efficiency is up to around 90 %. The inhibition efficiencies are increased by increase of the PEGs＇ concentration and molecular weight. Results obtained from the three techniques are in good agreements.
出处
《化学研究》
CAS
2008年第1期90-94,共5页
Chemical Research
关键词
聚乙二醇
聚合度
开路电位
极化曲线
电化学阻抗谱
polyethylene glycols
molecular weight
open circuit potential
polarization curve
electrochemical impedance spectroscopy
