Colored aluminum tubing , extruded aluminum window frame for
aluminum alloy profile
|Description||Colored aluminum tubing,extruded aluminum window frame for aluminum
|Material Thickness(t)||t=1.0 / 1.2 / 1.4|
|Material||Aluminum Alloy 6063, 6061|
|Color||Green, Grey, Black, White, (RAL series)etc.|
Mill finish, anodized, powder coated, electrophoresis,
sand balsting etc.and depend on customer’s demand.
|Shape||Square, Round, Flat, Oval, and according to customer's drawing.|
|Length||Normal length=6 m|
Building, Production Line, Decoration, Industrial, Transportation,
Door and window, etc.
1. Pearl cotton foam for each profile;
2. Wrap with shrink film exterior;
3. Packed according to customer request.
Providing colorful products with various mechanical
performances to adapt all kinds of architectural styles
The process control elements are described as follows:
Surface adjustment can eliminate surface by alkali degreasing or
pickling surface state caused by the inhomogeneity, make aluminum
surface formed a large number of very fine crystal center,
accelerating phosphating reaction speed, favorable for the
formation of phosphating film.
(1) the influence of the water bath water quality such as contained
in the dirty of serious, calcium and magnesium ions content is
bigger, can affect the stability of the table tuned liquid, bath
preparation can add softener in advance to eliminate the influence
of water quality on watch.
(2) use time table regulating commonly USES is colloid titanium
salt, colloidal activity, its existence when using for a long time,
or the impurity ions contained more colloid activity can be lost,
the stability of the colloid state are destroyed, slot liquid
precipitation stratification, assumes the flocculent, bath must be
replaced at this time.
Phosphatizing is a process of chemical and electrochemical reaction
to form phosphate chemical conversion film, which is formed by a
membrane called phosphatizing membrane. The main purpose of
phosphating is to provide protection to the aluminum material of
the base, and to some extent prevent the corrosion of aluminum. The
adhesion and anti-corrosion capability of the coating is improved
by the base of the coating. Phosphating is the process before the
one of the most important link, its complex reaction mechanism and
influence factors, therefore phosphating slot liquid bath for other
production process control is much more complex.
(1) the acid ratio (the ratio of total acidity to free acidity)
Improving the acid ratio can accelerate the phosphating reaction
rate, making the membrane thin and delicate, but the acid ratio is
too high to make the membrane too thin, easily cause the phosphates
to hang the ash; The acid is lower than the acid, the phosphating
reaction rate is slow, the phosphatic crystal is large and porous,
the corrosion resistance is low, and the phosphor is made of the
yellow rust. In general, the system or formula for phosphating is
different than the size requirement.
Bath temperature increasing, the film speed, but the temperature is
too high, will affect the change of acid ratio, which affect the
stability of the bath, and membrane layer of crystal nucleus is
bulky, slot liquid slag quantity increase.
(3) the amount of sediment
In the bath with ongoing phosphating reaction, the amount of
sediment will gradually increase, excessive amounts of sediment
affect the interfacial reaction on the surface of the workpiece,
lead to serious, phosphating film hair flower, hang ash even not a
film, so bath should be dealt with according to the amount of
artifacts and use time timely trough, slag removal in addition to
(4) nitrite root NO -2 (promoter concentration)
The "NO -2" can accelerate the phosphating reaction speed, improve
the density and corrosion resistance of the phosphatic membrane,
and make the membrane layer easily appear white or shine when the
content is too high. Too low, the film is slow, and the phosphating
membrane is prone to rust.
Pickling solution concentration is too high or water control is
easy to lead to increased in the phosphating slot liquid sulfuric
acid root ion, high sulfuric acid root ion will slow phosphating
reaction speed, the phosphating film grain bulky porous, hang ash
is serious, the corrosion resistance of phosphating film.
(6) ferrous ion Fe2 + :
When the concentration of subferrous ions in a phosphate solution
is too high, it will reduce the corrosion resistance of the normal
temperature phosphating membrane. It will make the medium
temperature phosphite granule large, the surface of the surface
float white ash, and the anti-corrosion ability is decreased. It
will increase the amount of slag, the solution will be cloudy and
the acid will rise.