Next Article in Journal
Influences of Different Die Bearing Geometries on the Wire-Drawing Process
Previous Article in Journal
Creep and High-Temperature Deformation of Metals and Alloys
Version is current.
Open AccessArticle

Electrochemical Impedance Analysis on Cryogenically Treated Dissimilar Metal Welding of 316L Stainless Steel and Monel 400 Alloy Using GTAW

1
Department of Mechanical Engineering, Birla Institute of Technology & Science, Pilani, Dubai Campus, University, Dubai P.O. Box 345055, UAE
2
Department of Mechanical Engineering, American University of Sharjah, Sharjah P.O. Box 26666, UAE
*
Author to whom correspondence should be addressed.
Metals 2019, 9(10), 1088; https://doi.org/10.3390/met9101088
Received: 10 July 2019 / Revised: 30 September 2019 / Accepted: 1 October 2019 / Published: 10 October 2019
An attempt was made to study the corrosion behavior of austenitic stainless-steel SS 316L/Monel 400 alloy dissimilar metal welded joints using gas tungsten arc welding. This combination of welded joints is used in re-heaters and heat exchangers in gas processing and oil refining industries. The welded specimens were subjected to post-weld treatments, such as annealing and deep cryogenic treatment. The welded specimens were sectioned into five different parts: SS 316L base, SS 316L HAZ, weld, Monel HAZ, and Monel base. The polarization method and electrochemical impedance analysis were used to analyze the corrosion resistance in a NaCl solution. A polarization graph, Nyquist plot, and Bode plot were constructed for all regions, separately, for the heat-treated and cryo-treated specimens, to analyze the variation in corrosion resistance in different regions, and then the results were compared. To validate the results of electrochemical impedance analysis, scanning electron microscope (SEM) and energy dispersive spectroscope (EDS) analyses were also performed. The results indicated that the cryo-treated specimens have better corrosion resistance when compared to the annealed ones. Weld region on both specimens exhibited better corrosion resistance when compared to other zones. View Full-Text
Keywords: dissimilar metal welding; gas tungsten arc welding; austenitic stainless steel; Monel alloy; corrosion resistance; electrochemical impedance analysis dissimilar metal welding; gas tungsten arc welding; austenitic stainless steel; Monel alloy; corrosion resistance; electrochemical impedance analysis
Show Figures

Figure 1

MDPI and ACS Style

Mani, C.; Karthikeyan, R.; Kannan, S. Electrochemical Impedance Analysis on Cryogenically Treated Dissimilar Metal Welding of 316L Stainless Steel and Monel 400 Alloy Using GTAW. Metals 2019, 9, 1088.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop