DEPOSITION OF METALS (AL, ZN, SN) AND THEIR OXIDES TO PROTECT CARBON STEEL PIPES CARRYING CRUDE OIL FROM CORROSION
Fahem I. Sultan1, , Walla M. Mohammed 2 Saad A. Jafar 3
1North Refineries Company, Biji, Iraq.
2 College of Education of Pure Sciences, Tikrit University, Iraq
3 College of Petroleum Processes Engineering, Tikrit University, Iraq
The vapor deposition method was used in a vacuum to paint samples cut from a carbon steel tube with an electric drill with a diameter of 25 mm. The students were using high-purity powders of aluminum, zinc, and tin. Then the samples were fixed in a closed crude oil recycling system. The flow inside the system was estimated at 2m3/h. Qayyarah crude oil was used in the study, and the oil in the system lasted one hour for each of the special experiments in minerals and their oxides. After the samples were exposed to crude oil, they are removed from the system and a cleaning process is performed for them. After that, structural tests are conducted, which included three Types of tests are (Xrd; Edx; SEM). Through these tests, a comparison was made between samples that were exposed to flow crude oil and their counterparts that were not exposed, as they were prepared in advance with the same practical conditions. From the comparison, we get to know the extent of the effect of crude oil runoff on the paint. And which types of coatings are more resistant to corrosion, as the coating with zinc metal was more resistant to corrosion than aluminum and tin metals, but in the case of coatings with oxides, tin oxide was the most resistant to corrosion than other oxides.
Keywords: Vapor deposition, Carbon steels, Crude oil, Structural tests, Corrosion