Study the Effect of the Corrosion Medium on the Corrosion Rates of Oil Pipes Made of Carbon Steel and Reinforced with a Composite Material

External corrosion of buried pipelines is easily influenced by the
complex subterranean environment, including soil resistivity, pH,
dissolved ion concentration, water content, and coating state. For
pipelines to be intrinsically safe, external corrosion rate prediction is
therefore crucial. This paper studied the effect of immersion medium
on the corrosion rates of samples made of low-carbon steel. The
samples were taken and prepared using cutting, grinding, and
cleaning the surface of the samples. A polymeric coating was
produced of an epoxy-based superimposed material and reinforced
with silicon carbide particles (SiC), zinc oxide powder (ZnO), and
titanium dioxide powder (TiO2). The mixing ratio of the two
components is 3:1. The samples were immersed amid the oil,
Majnoon field in Basra Governorate in Iraq, as well as the use of
sulfuric acid (H2SO4) and hydrochloric acid (HCL) as corrosion
media. The lowest corrosion rates were obtained for the titanium
dioxide-coated specimens in sulfuric acid and hydrochloric acid,
which were 0.00009 mm/y and 0.0001 mm/y respectively. The
weight loss of the specimens immersed in sulfuric acid was higher
than those immersed in hydrochloric acid.