Authors:
Hussein Y. Mahmood,Khalid A. Sukkar,Wasan K. Mikhelf,DOI NO:
https://doi.org/10.26782/jmcms.2019.08.00023Keywords:
Heat exchangers,Petroleum refinery,corrosion,Nano-coating,Abstract
In this paper, thermal pyrolysis nanocoating technique was used to coat the brass alloy (grade B-111) of heat exchanger that used in Midland Refineries Company- Iraq. The nanocoating specifications and surface characterization have been made by using many measuring techniques; Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD). From AFM results, it was observed that the particle size of nanocoated brass substrate was 70 nm. From XRD results it was showed high crystalline thin films. On the other hand, the SEM results showed good smooth surface morphology films. The corrosion behavior of with and without nanocoated brass tubes achieved by study the open circuit potential, corrosion current density and corrosion potential which are used to determine the corrosion rates in 3.5M of sodium chloride solution. The results indicated that nanocoated substrate showed insignificant weight losses in comparison to that of uncoated substrate. So minimum weight loss with CuO nanocoating with thermal pyrolysis technique at 0.04M was 2.5*10-2 mm/year.Refference:
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