Surfactants　play　an　important　role　in　the　domain　of　metal　anticorrosion.　Gemini　surfactants,　as　corrosion　inhibitors,　have　the　advantages　of　strong　practicality,　high　safety,　convenient　operation　and　fast　response.　In　this　study,　a　new　Schiff-base　cationic　Gemini　surfactant　(named　TMPA)　was　designed,　synthesized　and　characterized.　The　mechanism　of　metal　anticorrosion　of　surfactant　was　studied　by　electrochemistry　and　static　weightlessness　method.　And　the　adsorption　isotherm　of　TMPA　shows　that　the　behavior　follows　Langmuir　adsorption　isotherm.　The　anticorrosion　efficiency　of　printed　circuit　board　(PCB)　was　92.88%　and　Q235　carbon　steel　(Q235　CS)　was　97.78%　with　the　addition　of　only　5　mM　TMPA.　The　surface　appearance　of　the　PCB　and　Q235　CS　was　scrutinized　by　x-ray　photoelectron　spectroscopy　and　scanning　electron　microscopy,　proving　that　samples　have　few　corrosion　marks　in　the　presence　of　TMPA　and　oxidants.　These　results　show　that　TMPA　provides　an　attractive　application　in　terms　of　metal　corrosion　inhibition.　©　2023　AOCS.