Abstract: In order to evaluate the wax resistance of SO4 coating, model tests are made with steel plates acting as wax collectors. Comparative analyses on the wax deposition are made for different types of crude oils by using two wax collectors under the same process conditions, one coated with SO4, the other with no coating. SO4, having a strong polarity, is excellent in corrosion resistance as well as in resistance to wax deposition on surface. It is therefore concluded that SO4 can be a commendable coating material under the same process conditions against wax deposition.