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Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   APRIL 2014 , Volume 14 , Number 2; Page(s) 195 To 200.
 
Paper: 

RESEARCH CORROSION IN STAINLESS STEEL WITH ACOUSTIC EMISSION

 
 
Author(s):  KHAMEDI RAMIN*, POURSAEIDI ESMAEIL, JABBARI MOOSA
 
* MECHANICAL ENGINEERING DEPARTMENT, UNIVERSITY OF ZANJAN, ZANJAN, IRAN
 
Abstract: 

Acoustic Emission (AE) technique is a non destructive method which can be used for detection of corrosion mechanism. In this paper the corrosion of sulfuric and hydrochloric acids solution on some kinds of stainless steel like 304, 316 and GTD-450 with and without residual stress was surveyed by acoustic emission technique. Considering tests diagrams, cumulative counts in the samples with residual stress is more than other ones due to high sensitivity of stainless steel samples to stress corrosion cracking. Also frequency in the samples with residual stress is lower than other ones. Cumulative count in the stainless steel 304 is more than stainless steel 316 for all of the samples. A sudden and intensive corrosion in the hydrochloric acid environment was observed specially in the samples with residual stress. For stainless steel 304, this event was very harmful, because, it wills the cause of some pitting corrosion, which concentrates stress in these locations and finally creates crack in structure.

 
Keyword(s): ACOUSTIC EMISSION (AE), NON DESTRUCTIVE TEST (NDT), STRESS CORROSION CRACKING (SCC)
 
References: 
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