Improving Corrosion Resistance of Ss 316l Claddings by GMAW Process Under The Influence of Weld Pool Vibrations
This paper deals with the comparative studies of clad overlays fabricated by Gas metal Arc Welding process
under conventional conditions and generating the vibrations in the weld pool by external means. SS 316L claddings over low
carbon steel as base material has been used for the present work. Mechanical vibrations were induced in the weld pool
during cladding process by a set up capable of providing vibrations to the work table of varying frequency and amplitude.
Due to vibrations during the cooling of the weldment the grain structure obtained has been observed to be more refined with
lesser base metal dilution. Clad specimens were tested against the intergranular and pitting corrosion. Boling nitric acid and
ferric chloride tests were conducted on the extracted specimens from the experimentation. An overall improvement in the
corrosion resistance of the clad specimens were observed in the clad specimens fabricated under the conditions of vibrating
weld pool as compared to conventional GMAW process.
Key words - Clad overlays, Weld pool vibrations, Corrosion resistance, Intergranular corrosion, Pitting corrosion