Abstract: To solve the cleaning problem of gun propellant combustion residue in gun barrel, the dissolution process of residue is studied via microscopy method, the dissolution ratios of residue in different solvents are analyzed. The formulation of solvent is optimized by orthogonal test, which can remove more than 99% of the residue. The experimental results show that the microscopy method can be used to observe the dissolution process in real-time, which can be used as an effective solubility testing method.

Key words: ordnance science and technology, gun propellant, combustion residue, solubility, microscopy