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Intergranular and general Corrosion behaviour of 17‐4 PH weldments
Author(s) -
Raja K. S.,
Prasad Rao K.
Publication year - 1995
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19950460905
Subject(s) - intergranular corrosion , metallurgy , materials science , corrosion , welding , base metal , tungsten , inert , chemistry , organic chemistry
17‐4 PH stainless steel was welded autogenously by Tungsten Inert Gas welding process. The effect of various pre‐ and postweld thermal treatments on intergranular corrosion (IGC) and general corrosion resistance of base, weld and heat affected zones was stu‐died using electrochemical techniques. Intergranular and general corrosion resistance of base and weld metal were not affected by the thermal treatments significantly. However, the HAZ portion showed inferior corrosion resistance in the as‐welded and directly aged conditions. Solutionising followed by aging resulted in uniform and relatively better corrosion resistance of all the regions.