Authors

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 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.