51312-01396-The Influence of Flow rate Sand and Inhibitor on The Iron Carbonate Scales under Erosion-Corrosion

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Product Number: 51312-01396-SG

ISBN: 01396 2012 CP

Author: Abdulmuhsen Akbar

Publication Date: 2012

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This study focuses on the effects of flow rate sand and corrosion inhibitor on the ability of FeCO3 scale to offer protection to damage formed on X65 carbon steel. The test system is the submerged impingement jet (SIJ) system in a CO2 saturated environment and is therefore covering the higher velocity flow regime. The experiments were conducted at a temperature of 70 °C pH of 5.9 and 248 N/m2 wall shear stress (?w).The objective of the work was to establish the critical velocity to cause breakdown of any protective FeCO3 film formed in these conditions and to assess the balance of film formation and film removal processes under these hydrodynamic conditions. Weight gain/loss was measured for: as-received X65 specimens and specimens before and after removing corrosion scales in both blank and inhibited systems. In addition the hardness of the surface specimens and corrosion product layers was measured using a nano-indenter. This was supported by post-test analysis of samples using scanning electron microscopy (SEM) to assess both the nature and the thickness of the scales and energy dispersive X-ray spectroscopy (EDX) to reveal the elemental composition and the possible salts forming these protective films.