3-吲唑啉酮在石油沉积水中对储油罐Q235钢缓蚀性能研究

3-Indazolinone Inhibitor Performance for Oil tank Q235Steel in Petroleum Deposited Water Solution

通过电化学、扫描电镜和量子计算研究3-吲唑啉酮缓蚀剂在石油沉积水中对Q235钢的缓蚀性能和机理。试验表明:3-吲唑啉酮缓蚀剂能够减缓Q235钢的腐蚀,随着温度的升高,缓蚀效果能保持不变,随着缓蚀剂浓度的增加,缓蚀效果也增加,并且为阳极型缓蚀剂;SEM扫描电镜和量子化学计算表明3-吲唑啉酮的HOMO和LUMO主要分布在六元环与N原子上,以及与环相结合的羟基上的氧原子上,总体分布比较均匀。这说明缓蚀剂分子能够紧紧附着在金属Q235钢的表面,将腐蚀介质与金属区分开来,降低腐蚀。

The 3-indazolinone inhibition performance and mechanism for Q235 steel in petroleum deposited water solution were investigated through polarization curve measurement, impedance spectrum, SEM scanning and quantum chemical calculation The results showed that 3-indazolinone was determined as an anodic corrosion inhibitor,and the inhibition efficiency increased with the increase of inhibitor concentration. Through SEM scanning electron microscope and quantum chemical calculation, it was found that HOMO and LUMO of 3-indazolinone were mainly distributed on the six-membered ring and N atom, as well as the oxygen atom on the hydroxyl group combined with the ring, and the overall distribution was relatively uniform. This indicated that the corrosion inhibitor molecule can closely adhere to the surface of the metal Q235 steel, distinguish the corrosive medium from the metal, and reduce the corrosion.