Mohammed Abdulateef Ahmed; Oday shaker
Abstract
A study was conducted to demonstrate the effect of mechanical vibrations on the corrosion of steel pipelines for oil (x60, x20) in the corrosive medium is sea water by using the traditional ...
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A study was conducted to demonstrate the effect of mechanical vibrations on the corrosion of steel pipelines for oil (x60, x20) in the corrosive medium is sea water by using the traditional method of weight loss, where the test samples are cut cubic forms and dimensions (10x10x10 mm3). And offered samples to the corrosive solution (sodium chloride 3.5% NaCl) and called the term (sea water) in chemical engineering and corrosion engineering fields. This medium would be static with frequency (0 Hz), and vibrated with a five frequencies (5, 10, 15, 20& 25 Hz) and the amplitude within the range of (0.0013-0.00088m) to be the speed of vibration within the (0.00475-0.022), and for a test time (2hr.). These laboratory vibrations were obtained from the design and manufacture of corrosion presence vibration instrument according to U.S. global standard (ASTM G32). It was found that the speed of vibration increase the corrosion rate of these alloys of (0.00073 gmd) at the speed (0) to (0.00287 gmd) at the speed (0.022) for alloy X20, and (0.00195 gmd) at the speed (0) to (0.00402 gmd) at the speed (0.022) for alloy X60. That is, the highest value for the rate of corrosion is to alloy X60 at the speed of vibration (0.022), followed by corrosion rate of alloy X20 at the same speed. When the speed of vibration was (0), the corrosion rate of alloy X60 is also more of the corrosion rate of alloy X20.
