|M32||MEDIUM SATIN – same operation as M31, except 120 –180 grit is used.|
|M33||COARSE SATIN – same operation as M31, except 80 –120 grit is used.|
|#4||NON-DIRECTIONAL SATIN – 80 – 150 grit with no grain direction.|
|#4||LONG GRAIN – not the rice but a long continuous grain.|
Primarily used in final finish buff operations on stainless steel, steel, brass, aluminum, nickel, and chrome. The green rouge is a chrome oxide, and is considered the best all around luster compound.
The white rouge is the softer than green rouge. Primarily used in the final finish of steel, stainless steel, and zinc. This compound is also a favorite in coloring aluminum and brass.
Primarily used in the final finish of gold and silver, it is the finest of all rouges. It also produces an excellent finish on brass.
Stains & Rust with Stainless Steel Welds
by Lorne Goldman November 2009
I have often received inquiries
on why Morgan stainless steel (ss) welds discolor and can even rust at the
sites. The reasons are quite simple and well-known to most properly trained
welders. The surface discoloration on stainless steel after welding
or even after grindingis oxidation. At too high
a temperature, the stainless steel will combine with oxygen to form an oxide
layer on the metal surfaceor within the weld. The color of the "stain"
is a function of the layer thickness. This will also vary with the type
of stainless chosen. The oxidation indicates that the metal temperature
when welding was too high..probably in excess of 500C when 315C would have
done better, been much stronger and looked like a jeweler had a hand in
it. OR it could also be a unwise choise of stainless welding wire or a combination
of these factors. It is a simply matter to try different heat and stainless
types to determine what will be idea. Improperly chosen equipment can also
make a decent weld more difficult.
Sadly, the high heat also destroys the anti-rusting
elements in the stainless and weakens the metal eventially causing rust
and breakage. Trying to grind off the
discoloration or rust makes the weld even weaker. Polishing can sometimes
correct the aesthetic effect but will not otherwise address the damage caused
by the welding.
Prevention is simple and costless. The Factory simply
needs to use the right type of stainless steel welding wire at the correct
temperature with the correct technique. That will prevent the
stains, keep the metal strong and rust resistant and be considerably more
There is no cure for any of this after the fact.