locomotive wheel slip in railway transport is a very actual problem for operation
process especially on the main tracks and tracks between industrial oil company and
power- generating stations, which always need to supply by oil products.
This res
earch included the conclusion of the reasons leading to the occurrence of the
event wheel slip as well as study the technical reality of the work of sand management
system in the locomotives and conduct analyzes and assessments of the substance sand
used to overcome such situation with the suggestion of suitable alternatives to raise the
adhesion coefficient between the railway wheels and improve an operating circumstances
animation tools Line.
Other causes include the contact of oil with the flanges and rims of wheels, which
reduces adhesion with the surface of the rails, and a general loss of traction on steep
gradients when pulling heavy loads.
In this research we studied the corrosion rate changes of iron samples which are not
galvanized in the laborators ( laboratorsies of the faculty of science) and in nature (on the
beach of the high-institute sea- research in Lattakia)
The Inula ext
racts were choosen as a plant inhibitor to cover the iron samples and
protect it . because this plant is well known in the Coastal area, also it,s very cheap and
easy to find and has good anti oxidation properties.
The best conditions for (Inula-seawater) extract were : (PH=7 , time =24 hours ,
concent ration = 10%).
The studied iron samples were treated with the ( inula-seawater) extract in the same
previous conditions and we studied the corrosion rate changes for those samples and the
affectivity of the inhibitor for them.
The results were compared in each stage with other samples that were not treated .
the treatment and after it were as follows:
The velocity of the corrosion in the iron samples (before the treatment with the
extract) in 120 days:
- in the laboratory tanks was 0.78 mg/cm2 .day, but after the treatment was 0.23
mg/cm2.day
-in the drizzle area was 0.80 mg/cm2.day, but after the treatment was 0.47
mg/cm2.day
-in the waves area was 0.75 mg/cm2.day , but after the treatment was 0.41
mg/cm2.day
- in the depth area was 0.79 mg/cm2.day , but after the treatment was 0.21
mg/cm2.day.
يدرس هذا البحث تآكل الحديد في أوساط مختلفة كالوسط الحمضي والقلوي والمياه المالحة ومياه الشرب والهواء الرطب
This invention relates to process for preventing both corrosion and the formation of scale in water- conducting systems which
comprises adding a zinc carbonate and hydroxyl ethylene diphosphoric acid (HEDA) to water.
The main problems arising in hy
draulic engineering, e.g. when
untreated water for cooling purposes are the occurrence of corrosion and the formation of scale.
The corrosion of metals such as steel, copper and alloys of these
metals which commonly used for water circulation tanks is mainly
due to the action of oxygen, carbon dioxide ,chloride gas , chloride ions and many others ions dissolved in the water.
The prevention of corrosion by forming thin film of complex HEDA
and zinc ions which actions with corrosion ions while the
prevention of scale by forming heat stable soluble complexes with
calcium and magnesium.
This paper provides a mechanism to study aluminum diffusion microstructure, phase
structure and different properties of the aluminized layer in carbon steel.
The results of aluminized treatment in saturated medium lead to the formation of diffusion
layer coating that contains iron aluminide and a- solid solution of aluminum in the unit cell of
iron.
The effect of aluminizing process parameters on the aluminizing layer, especially the
effect of temperature and time, has been shown to increase the depth of the aluminized layer
when temperature and time increase, but the effect of temperature is greater than time.
A protection Method for the primary loops metals of nuclear power plant
from corrosion was investigated. Hydrogen molecules were added to the
primary circuit to eliminate oxygen molecules produced by radiolysis of coolant
at the reactor core. The
hydrogen molecules were produced by electrolyses of
water and then added when the coolant water was passing through the primary
coolant circuit.
Thermodynamical process and the protection methods from corrosion were
discussed, the discussion emphasized on the removal of oxygen molecules as one
of the protection methods, and compared with other methods .The amount of
hydrogen molecules needed for complete removal of oxygen was estimated in
two cases: in the case without passing the water through the oxygen removal
system, and in the case of passing water through the system. A pressurized
water reactor VVER was chosen to be investigated in this study. The amount of
hydrogen molecules was estimated so as to eliminate completely the oxygen
molecules from coolant water. The estimated value was found to be less than
the permissible range for coolant water for such type of reactors.
