Fast black agents at room temperature
Fast black agents at room temperature
Executive GB/T5519-2002 Standard
NS-1-type blackening agent is a kind of energy-saving and efficient
new products, new processes, it applies to weapons, instruments,
vehicles, tools, measuring tools, daily utensils, fasteners,
machinery parts, standard parts such as the surface of ferrous
metal products made black (blue) handles the material is an effective method of
corrosion protection, and has a certain decorative effect.
1, the product key technical indicators
1, Appearance: light blue transparent liquid
2, PH value :1-1 .5
3, insoluble matter content: less than 0.1%
2, the product characteristics
1, the product from the oxidant, catalyst, the active ingredient to
help color agents obtained by the repeated preparation of a
concentrated liquid stock solution per liter, black area of about 2
m 2.
2, the product can be carried out at room temperature in the
perennial black handled without heating, effectively save energy,
reduce costs, can replace the high-temperature alkaline blackening
process.
3, due to blackening process was completed just a few minutes and
shorten the production cycle, improve work efficiency.
4, This product blackening process to avoid using toxic substances
nitrites and no heating, significantly improved the working
conditions and reduce environmental pollution.
5, with the black-treated metal surface, the film's density and
color fastness with the extension of storage time increased.
Third, use
l, pretreatment: black surface treatment will be required before
degreasing parts decontamination washing, and then pickling rust,
the last alkaline cleaning or washing. The process: In addition to fats (caustic washing or rust cleaners)
rinsing rust (pickling) water washing black rinsing seal storage.
2, black: The thick black agent and water to 1:5-10 (volume ratio),
diluted, and then placed in pre-treated parts, stirring several
times, about 3 5 minutes, remove, rinse with water . Black residue after the liquid can be recycled, filtered, got
yellow liquid working fluid can be prepared, plus a new solution
volume is about 10% of filtrate, specifically measured PH value
between 2.0 and 2.5, if the Mixing old and new hair piece black liquor treatment ineffective,
this fat black liquor that can not be used. Blackening dilution ratio and the black parts of the material time
from the decision, but also the implementation of the second black,
for the large complex structure or shape of the workpiece can also
be implemented brushing black.
3, after rinsing the workpiece in a minute that is immersed in fat
black liquor inside, or else there is a thin layer of rust,
affecting the quality of black.
4, Seal: black washed the parts after the basic leaching dry, in
time anti-rust oil dehydration or heat oil in a few minutes later,
remove the shower to make the oil slick, warehousing storage.
5, after the black does not rub the workpiece touch, clean water
rinse can not be strong, be placed 24 hours to reach dense solid
protective film.
4, black pieces of test
l, Appearance: a continuous uniform film, no flower spots, no red
hanging gray cast iron pieces of the surface was dark brown, the
other was black or blue black.
2,2-3% copper sulfate spot test is greater than 30 (S).
3,5% oxalic acid test is greater than 5 (min).
4, 1-2 years stored in the indoor environment without losing
points, and the increasingly dense film.
V. Notes
1, black agents can be used diluted Stir well, according to the
number of parts, with the distribution with the use, in order to
save.
2, black clean before the workpiece must be strictly net oil stain,
which is key to the quality black.
3, using the working concentration should be avoided too thick,
black for too long, resulting in lower quality parts black.
4,
