This research aims to decrease the cost of last production stages
through decreasing the cost of potential casing repair by avoiding the
problems that casing string may be exposed to. Such problems are
caused by the temperature effect of salt dril
ling fluids as well as other
fluids normally existed in the annular behind casing at the nonecemented
intervals.
our present work is to study the effects of MgO, the specific
fuel consuming, and the hot corrosion effects on thermal boilers
and the SOX ,NOX compound produced in the exhausting
steam,(or gases).
This research aims to increase the production lifetime of oil and gas
wells through avoiding the problems that production casing string
may be exposed to. Such problems are caused by the effect of different
drilling fluids as well as other fluids normally existed in the annular
behind casing at the none-cemented intervals.
This research aims to study the reduction of air heaters corrosion in
steam boilers and increasing their efficiency , by the application of
combined heating of air by steam and exhaust gases.
The experimental data of this research demonstrates tha
theater
corrosion could bereduced by maintaining the exhaust gases
temperature above the dew point of sulfuric acid depending onthe
amount of sulphur in the fuel oil ,by controlling air heat temperature
by steam.Which increases the boiler efficiency as a consequence of
reducing the fuel consumption by 9% as a maximum , reduces heat
loss, minimizes maintenance costs and reduces the time of emergency
shutdowns.
The corrosion inhibition of transmision steel in 1M HCl solution in
the presence of Vanillin at temperature (20,30,40,50,60)°C at
concentration between (100-500) ppm for two hours were studied
using weight loss method.
We studying in this research the reaction with Zinc sulphate in an
aqueous solution by physical - chemical method in presence of
Succinic Acid , and determined compounds which are formed in
this solution and we calculated of it formation the const
ants.
After we used these electrolytes in plating by Zinc , that is by
electro precipitation of this metal on the solid electrodes (steel,
copper) so that we definite the best of these electrolytes for galvany
and the set necessary conditions for its use.
Oil and gas buried pipeline are usually protected by a thick organic coating and supported by a cathodic protection system. The protection process allows the pipe line protection against corrosion; however, corrosion is taken place in the cracks and
holes of insulation coating due to pipelines adjacency to electromagnetic fields. The process is called AC corrosion affected by some parameters such as AC induced amplitude, cathodic current protection and soil type. This corrosion was theoretically and practically studied by using carbon steel pieces. In addition, a solution stimulating the soil where the pipelines are buried was used. This phenomenon was studied through several experiments. Corrosion compounds were also analyzed. The results revealed a significant effect of AC induced amplitude and soil resistance. It has been also shown that 50 Hz frequency can be very quick in comparison with corrosion occurrence time at each positive or negative AC current phase.
The corrosion inhibition of transmision steel in 1M HCl solution in
the presence of Succinic acid at temperature (20,30,40,50,60)°C at
concentration between (10-6- 10-4) M for two hours were studied
using weight loss method.
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.
We have studied in this paper the effect of thermal gaseous using NH3 – gas at some
diffusion layers properties of tool steel 20 in temperature range (550 ,650 ,750, 850) 0C ,
4h at each one . The purpose of this heat treatment is to get and determ
ine the microhardness,
fatigue and corrosion resistance.
The micro-hardness was determined using Vickers's tester with values ranged
between ( 130-435 ) HV.
In order to verify these results, we studied the microstructure if the surface layers
using metallurgical microscope and SEM (Scanning Electron Microscope). Furthermore
the corrosion resistance was studied after immersing it in sea water for two year.
