Dacromet is the translation and
abbreviation of DACROMET, abbreviated as Dacromet, Dacromet Rust,
Dicron. The domestic name is zinc-chromium coating, a new type of
anti-corrosion coating with zinc powder, aluminum
powder, chromic acid and deionized water as the main ingredients. Dacromet is a process of
degreasing--shot blasting-- coating-- curing-- cooling-- finished
product. so that the surface of the workpiece to form a sheet of
zinc powder, aluminum powder and metal chromium salt composed of
silver gray anti-corrosion coating. Dacromet film, in the forming
process of metal surface, the volatile material is almost all the
water through the gasification,and no pollution, has been widely
used in industrial developed countries, is gradually replacing the
serious pollution of electroplating zinc, chromium, hot dip
galvanizing, hot spray zinc, mechanical galvanizing, zinc-based
alloy coating, oxidation, phosphating and other traditional surface
treatment processes,fundamentally reduce the occurrence of
environmental pollution, and has the advantages and characteristics
incomparable to other surface treatments. The whole set of Dacromet process equipment
adopts the whole process of closed circuit coating method, which
revolutionizes the plating process and eliminates the pollution
problems such as acid, alkali, zinc, chromium and the emission of
sewage and exhaust gas produced during the plating process.
Anti-corrosion
of small and medium-sized brackets, connectors, exposed
parts and fasteners of various high-strength chassis on
laden vehicles, such as various special-shaped steel
brackets, bolts (including riding bolts, wheel bolts,
etc.), nuts, etc. Foreign countries have clearly
recommended the use of Dacromet coating to achieve
anti-corrosion protection for fasteners on
the car ≥ 10.9 grade, because Dacromet coating not only
has high corrosion resistance, but also can ensure no
hydrogen embrittlement. High strength steel has the risk
of hydrogen embrittlement in the process of pickling and
electroplating, etc. Although the hydrogen can be
removed by heat treatment, it is difficult to remove
completely. Dacromet coating process does not require
pickling and activation, and there is no electrochemical
reaction leading to hydrogen precipitation, which avoids
the phenomenon of hydrogen embrittlement.
Anti-corrosion
of metal parts around the engine and other high heat
environments, such as heat shields, exhaust pipes, radiators,
engine cylinder heads and other parts.
Anti-corrosion
of various elastic parts on load vehicles, such as ring hoops,
semi-circular clamps, various springs, leaf springs, etc. These
parts require high strength and hardness, electroplating
treatment will produce hydrogen embrittlement, such as
incomplete hydrogen removal, long time to bear dynamic load is
prone to tearing or corrosion fatigue, will bring safety hazards
to the car driving, especially for heavy vehicles, the operating
environment is relatively harsh, so the surface treatment
requirements of these pieces are correspondingly high, and
Dacromet coating has high corrosion resistance, high weather
resistance. It is very suitable for the surface treatment of
this kind of auto parts.
Anti-corrosion
of various complex shaped tubes and cavities of parts on laden
vehicles, such as exhaust pipes of engines, mufflers, etc. If
such parts are treated by electroplating, due to the complexity
of the shape of such parts and the limitations of the
electroplating process, the formation of the coating is not
uniform, and may even occur leakage plating, which will cause
the corrosion resistance of the parts to drop sharply, directly
affecting the performance and service life of automotive parts. The
Dacromet process uses impregnation and other methods, there is
no problem in the plating process of uniform coating ability and
depth ability is not good, and Dacromet treatment solution has
excellent penetration ability, in close contact with the gap can
also form a good protective film, especially for the
anti-corrosion of tube and cavity complex automotive parts ,
some assembly parts after assembled is also suitable for
Dacromet treatment. In addition, Dacromet coating is not subject
to the erosion of various oils, antifreeze, cleaning agents and
other chemicals, chemical resistance, weather resistance are
also very good, so Dacromet is very suitable for the
anti-corrosion of the chassis of heavy vehicles and automotive
exterior parts.
