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Paper Information

Journal:   INTERNATIONAL JOURNAL OF IRON AND STEEL SOCIETY OF IRAN   2010 , Volume 7 , Number 1; Page(s) 33 To 36.
 
Paper: 

EFFECT OF AGEING HEAT TREATMENT ON CORROSION BEHAVIOR OF 17-4 PH STAINLESS STEEL IN 3.5% NACL

 
 
Author(s):  TAVAKOLI SHOUSHTARI M.R.*
 
* MATERIALS DEPARTMENT, FACULTY OF ENGINEERING, SHAHID CHAMRAN UNIVERSITY, AHVAZ 61355, IRAN
 
Abstract: 
The 17-4PH alloy is a martensitic stainless steel with 3-5 wt% Cu, strengthened by the precipitation hardening. Due to excellent mechanical properties, corrosion resistance and ease of heat treatment, this alloy has unique applications in nuclear power plants and marine constructions. In this paper, the influence of ageing heat treatment, solution annealing followed by ageing at 480, 550 and 620oC on the corrosion behavior of 17-4PH stainless steel in 3.5% NaCl is reported. Various DC electrochemical measurements and microscopical examination was used. The slow scan rate potentiodynamic polarization revealed that by increasing ageing temperature from 480 to 550oC, the pitting potential is significantly increased, but further increasing the ageing temperature to 620oC reduces the pitting potential. Microscopical observation also confirmed the formation of several metastable and stable pits in the sample aged at 620oC.
 
Keyword(s): 17-4PH STAINLESS STEEL, CORROSION, AGEING HEAT TREATMENT, POTENTIODYANIMC POLARIZATION
 
References: 
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