Volume 11, Issue 41 (11-2021)
مهندسی خوردگی 2021, 11(41): 23-33 |
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Failure Analysis of Steam Condenser
Heat Exchanger Tubes. مهندسی خوردگی 2021; 11 (41) :23-33
URL: http://journal.ica.ir/article-1-161-en.html
URL: http://journal.ica.ir/article-1-161-en.html
Abstract: (270 Views)
Failure analysis was carried out on yellow brass tubes that leaked after five years of service in a heat exchanger.
The leaked tubes had numerous longitudinal cracks. The service fluid inside the brass tubes was cooling water
used to exchange the temperature with hot steam at the shell side. Microscopic examinations and energy
dispersive spectroscopic analyses were carried out on the brass tube inside and outside surfaces to understand the
root cause of the failure. Microscopic examinations of the tubes at the fracture edges and cracked areas revealed
that the tubes suffered severe dezincification, and cracks initiated and propagated from the regions that suffered
dezincification, causing the failure of tubes. It is suggested to control the corrosive species in cooling water and
select proper material for tubes to avoid the premature failure.
The leaked tubes had numerous longitudinal cracks. The service fluid inside the brass tubes was cooling water
used to exchange the temperature with hot steam at the shell side. Microscopic examinations and energy
dispersive spectroscopic analyses were carried out on the brass tube inside and outside surfaces to understand the
root cause of the failure. Microscopic examinations of the tubes at the fracture edges and cracked areas revealed
that the tubes suffered severe dezincification, and cracks initiated and propagated from the regions that suffered
dezincification, causing the failure of tubes. It is suggested to control the corrosive species in cooling water and
select proper material for tubes to avoid the premature failure.
Type of Study: Research |
Subject:
General
Received: 2023/01/28 | Accepted: 2023/01/30 | Published: 2023/01/30
Received: 2023/01/28 | Accepted: 2023/01/30 | Published: 2023/01/30
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