Guo Xingxing, Wang Chengsheng, Fu Hua, Tian Li, Song Hua
Department of Civil Engineering, Changzhi Vocational and Technical College, Changzhi 046000, China.
Tianjin Port Engineering Design & Consulting Company Ltd. of CCCC, Tianjin 300456, China.
Materials (Basel). 2024 May 6;17(9):2168. doi: 10.3390/ma17092168.
The corrosion resistance properties of a new type of environmentally-friendly organic inhibitor containing amino ketone molecules are presented in this paper. To evaluate the prevention effect of the inhibitor on corrosion of reinforcement, the electrochemical characteristics of steels in the simulated concrete pore solution (SPS) were investigated under varied conditions of the relevant parameters, including concentrations of the inhibitor and NaCl, pH value, and temperature. The inhibition efficiency of the material was characterized through electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and the weight loss of steels. The results reveal a significant improvement in the corrosion resistance of steels with the inhibitor. A maximum resistance value of 89.07% was achieved at an inhibitor concentration of 4%. Moreover, the new organic inhibitor exhibited good corrosion protection capability for steels under different NaCl concentrations. Its inhibition efficiency was determined to be 65.62, 80.06, and 66.30% at NaCl concentrations of 2, 3.5 and 5%, respectively. On the other hand, it was found that an alkaline environment was favorable for an enhanced corrosion prevention effect, and an optimal pH value of 11.3 was observed in this work. Besides, the inhibition efficiencies at different temperatures showed a trend of 25 > 35 > 40 > 20 > 30 °C, with a maximum value of 81.32% at 25 °C. The above results suggest that the new organic material has high potential to be used as an eco-friendly and long-term durable inhibitor for steel corrosion prevention under complex conditions.
本文介绍了一种新型含氨基酮分子的环保型有机缓蚀剂的耐腐蚀性能。为评估该缓蚀剂对钢筋腐蚀的防护效果，研究了在不同相关参数条件下，包括缓蚀剂和氯化钠浓度、pH值及温度，模拟混凝土孔隙溶液（SPS）中钢材的电化学特性。通过电化学阻抗谱（EIS）、动电位极化和钢材失重对该材料的缓蚀效率进行了表征。结果表明，添加缓蚀剂后钢材的耐腐蚀性有显著提高。缓蚀剂浓度为4%时，最大电阻值达到89.07%。此外，新型有机缓蚀剂在不同氯化钠浓度下对钢材均表现出良好的腐蚀防护能力。在氯化钠浓度分别为2%、3.5%和5%时，其缓蚀效率分别为65.62%、80.06%和66.30%。另一方面，发现碱性环境有利于增强防腐蚀效果，本研究中观察到的最佳pH值为11.3。此外，不同温度下的缓蚀效率呈现25＞35＞40＞20＞30℃的趋势，25℃时最大值为81.32%。上述结果表明，这种新型有机材料在复杂条件下作为环保型长效钢材腐蚀缓蚀剂具有很高的应用潜力。
