Citation: XU Yi-Chun, TANG Bing, FU Feng-Lian, WANG Qiao-Yun, LIN Shao-Qiong, FENG Chun. Corrosion Inhibition and Antifog Properties of an Environmentally Friendly Polyaspartate Inhibitor on A3 Carbon Steel[J]. Acta Physico-Chimica Sinica, 2010, 26(05): 1225-1232. doi: 10.3866/PKU.WHXB20100516
绿色聚天冬氨酸复配缓蚀剂对A3碳钢的缓蚀抑雾作用
采用失重法和极化曲线法研究了聚天冬氨酸(PASP)和十二烷基酚聚氧乙烯醚(OP-10)复配对A3碳钢在6 mol·L-1 HCl腐蚀介质中的协同吸附行为及缓蚀抑雾作用. 结果表明: 复配缓蚀剂可有效抑制A3碳钢在HC1介质中的腐蚀, 当PASP浓度为20 g·L-1, 缓蚀率可达94%, 抑雾率83%; 随着温度的升高, 复配缓蚀剂的缓蚀性能下降. 复合缓蚀剂在钢表面的吸附符合校正的Langmuir模型, 吸附过程为放热、熵减的自发过程; 复配体系属于阳极型缓蚀剂.
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关键词:
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聚天冬氨酸
- / 十二烷基酚聚氧乙烯醚
- / 缓蚀抑雾
- / A3碳钢
- / 盐酸
English
Corrosion Inhibition and Antifog Properties of an Environmentally Friendly Polyaspartate Inhibitor on A3 Carbon Steel
The synergetic adsorption, antifogging and corrosion inhibition properties of polyaspartate (PASP) and dodecane phenol polyoxyethylene ether (OP-10) on A3 steel were investigated in 6 mol·L-1 HCl by weight loss and electrochemical techniques. Results showed that the combined inhibitor strongly inhibited the corrosion of A3 carbon steel in HCl. The efficiencies of corrosion inhibition and antifogging using 20 g·L-1 PASP were 94% and 83% , respectively. The inhibition efficiency decreased as the system temperature increased. The adsorption behavior of the combined inhibitor on the surface of the steel followed the amended Langmuir adsorption isotherm equation. The adsorption resulted in an entropy decrease and was a spontaneous and exothermic process. The combined inhibitors were anodic inhibitors.
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