In this study, the broad-spectrum antimicrobial property of dodecyl dimethyl benzyl ammonium chloride (DDBAC) was investigated against three species of bacteria, Lysinibacillus sphaericus (L. sphaericus), Acinetobacter lwoffii (A. lwoffii), and Sediminibacterium salmoneum (S. salmoneum) isolated and purified from a naval aircraft fuel system. Through the inhibition zone method and minimum inhibitory concentration test, DDBAC was found to have a good antimicrobial performance with a minimum inhibitory concentration of 64 mg/L. The influence of DDBAC on the corrosion behavior of fuel tank material was evaluated by electrochemical measurements, such as polarization curve and electrochemical impedance spectroscopy (EIS). The polarization curve indicated that DDBAC suppressed anodic and cathodic reactions as a mixed-type corrosion inhibitor, and the inhibition efficiency was 68.38% at the concentration of 80 mg/L after 28 days of immersion. The EIS results showed that DDBAC inhibited the corrosion of 7B04 aluminum alloy in the concentration range of 40–120 mg/L. The DDBAC adsorption on the aluminum alloy surface was in agreement with the modified Langmuir adsorption isotherm model. The quantum chemical calculations proved that a lone pair of electrons of nitrogen atoms in DDBAC were able to form coordinate bonds with the empty orbital in aluminum, resulting in a tight chemisorption layer on the aluminum alloy surface and corrosion inhibition.

在这项研究中，研究了十二烷基二甲基苄基氯化铵 (DDBAC) 对球形赖氨酸杆菌( L. sphaericus )、鲁氏不动杆菌( A. lwoffii ) 和沙门氏菌( S. salteum )三种细菌的广谱抗菌性能。) 从海军飞机燃料系统中分离和净化。通过抑菌圈法和最低抑菌浓度试验，发现DDBAC具有良好的抑菌性能，最低抑菌浓度为64 mg/L。DDBAC对燃料箱材料腐蚀行为的影响通过电化学测量来评估，例如极化曲线和电化学阻抗谱（EIS）。极化曲线表明，DDBAC作为混合型缓蚀剂可抑制阳极和阴极反应，在80 mg/L浓度下浸泡28 d后抑制效率为68.38%。EIS结果表明，DDBAC在40-120 mg/L的浓度范围内抑制了7B04铝合金的腐蚀。DDBAC在铝合金表面的吸附与改进的Langmuir吸附等温线模型一致。量子化学计算证明，DDBAC中氮原子的孤对电子能够与铝中的空轨道形成配位键，从而在铝合金表面形成致密的化学吸附层并起到缓蚀作用。