Abstract:In this paper

Oil was classified according to polar and nonpolar

the effect of magnetic field modification on surface tension of oil is studied. The result shown with the increase of magnetic intensity

magnetic field modification make surface tension of nonpolar oil rise by 0.3% ~ 4%

and surface tension of nonpolar oil present cyclical change

interfacial tension of water-oil can be reduced

nonpolar oil dispersivity in water can be improved

however

magnetic field modification making surface tension of polar oil decrease

is similar to that of water. After nonpolar oil is mixed with polar oil

when polar oil is minor

nonpolar oil take the leading role

magnetic field modification make surface tension of nonpolar- polar oil mixture rise

however

with the increase of polar oil component in nonpolar- polar oil mixture

polar oil take the leading role gradually

magnetic field modification make surface tension of nonpolar- polar oil mixture decrease.