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Journal of Failure Analysis and Prevention

, Volume 16, Issue 4, pp 667–677 | Cite as

Optimizing Concentration of Drag Reducing Polymer in Case of One- and Two-Phase Flow in 90° Copper Elbow

  • Mohamed Ahmed Fouad Mohamed Gaber
  • Tagreed Mohamed Zewail
  • Nieven Kamal Amine
  • Yehia Ahmed El-tawail
Technical Article---Peer-Reviewed
First Online:
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Revised:
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Abstract

The rate of diffusion-controlled corrosion of 90° Copper Elbow by acidified dichromate has been investigated in relation to the following parameters: effect of solution velocity in the absence and presence of drag reducing polymer in case of liquid, gas, and solid flows on the rate of diffusion-controlled corrosion. The result has been obtained according to those equations: k α v 0.44 in the absence of drag reducing polymer, k α v 0.33 in case of liquid–solid and the presence of drag reducing polymer, k α v 0.36 in case of liquid–gas and the presence of drag reducing polymer

Keywords

Copper elbow Drag reducing polymer Liquid solid system Liquid gas system Rate of diffusion-controlled corrosion Two-phase flow 

List of Symbols

A

Active area (cm2)

d

Tube diameter (cm)

k

Mass transfer coefficient inside elbow (cm/s)

kd

Mass transfer coefficient in the presence of drag reducing polymer (cm/s)

ks

Mass transfer coefficient in the presence of suspended solid (cm/s)

v

Solution velocity (cm/s)

T

Temperature of reaction (K)

t

Time (s)

μ

Viscosity (g/cm s)

ρ

Density (g/cm3)

α

% of enhancement

Υ

Inhibition efficiency

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Copyright information

© ASM International 2016

Authors and Affiliations

  • Mohamed Ahmed Fouad Mohamed Gaber
    • 1
  • Tagreed Mohamed Zewail
    • 1
  • Nieven Kamal Amine
    • 1
  • Yehia Ahmed El-tawail
    • 1
  1. 1.Chemical Engineering Department, Faculty of EngineeringAlexandria UniversityAlexandriaEgypt

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