Abstract: Surfactant,strong alkali,strong oxidizing agent,flash melting and quick dredging component as well as heat-assisting agent were used to prepare a strong potent sewer pipeline dredging agent.The formulation factors affecting dredging were identified via experimental tests.The optimal formulation was studied by orthogonal test.Results showed that when the mass fraction of Ca(OH)₂ is 65%,Ca(ClO)₂ 21% and surfactant 4%,the molar ratio of Ca(OH)₂ to aluminum is 1∶2,and the mass ratio of C₆H₁₁NaO₇ to aluminum is 1∶5,better efficacy of the dredging agent can be obtained,and the corrosion rates on most kinds of metal were rather low.

Key words: anionic surfactant, sewer pipeline dredging agent, preparation, orthogonal test