Abstract:

The research progress of bis-quaternary ammonium salt as corrosion inhibitor is reviewed. Bis-quaternary ammonium salt is a new kind of cationic Gemini surfactant. Due to its low toxicity，good surface activity and good water solubility，it is a promising corrosion inhibitor. According to molecular structure，bis-quaternary ammonium salt is classified into three categories：symmetrical alkyl bis-quaternary ammonium salt，symmetrical heterocyclic bis-quaternary ammonium salt，and non-symmetrical bis-quarternary ammonium salt. The testing results of corrosion inhibition of such three categories are summarized. The research of bis-quaternary ammonium salt is not systematic，and future research will focus on environment-friendly bis-quaternary ammonium salt，inhibition mechanism and industrial applications.