paraffin wax deposition and fouling

surface seemed to stabilize after approximately one hour (see fig.
It was concluded that whereas deuosition on a freshly rolished
contact angle, as measured by methyleie iodide, was about 40 degrees.
steel surface was increased by adsorbing on it a film ci crude oil
distribution rcsidua from a benzene solution (0. mg/cm). The
Pctton and investigated the effect of wettahility
- 20 -
DD mesh sand, resulted in aerceition o± an extremely severe nature.
postulated that :hen an adsorbed film is present on the surface,
rolished steel striace Samdb:.asting of the plastic coatinms by
on naraffin derosition. Tne aruaratus and solution used have been
ahenclic ama ;clrrethane formulations behaved as derasition on the
discussed in Section 2..5.5 The wettability of a polished stainless
cit alternatec.. .Several tlastic coated surfaces were a_so mnvesta—
end of two hours exceeded slightly the amount deposited on the bare
roughness factor, as measured by the average distance between
This allows the paraffin molecules to anchor themselves laterally
gated. It was found that derosition on thenol—iormaliehye, asoxy—
the heptanc—wax solution partially dissolves in it and the film
2.3.5.2), derosition on the film continued to increase and at the
surface. Paraffin deposition therefore increases with increased
surfaces exceut the rdlished steel, dsere build—up and slldir.j
mmt. sca_e stee; corromec. steel anc. rouga grouno. stee. tue
deposition in a cold spot tester. The raraifin was deposited on
5 to 70 microns. The -caraffia wax was found to athere to all the
5 different steel surfaces: polished steel; saniblasted steel;
thus increase the force with which they are held to the surface.
is penetrated by the hii molecular weight paraffin molecules.
free surface energy of the deposition surface. Patton and Jessen
tac eas ama vaLeys of tne contour of tne suazaces, rangec. :rom
tO adjacent molecules which are firmly adsorbed on the surface and
Jorda i2) investigated the effect of roughness on paraffin