Effect of welding parameters on pitting corrosion rate of pulsed current micro plasma arc welded AISI 304L sheets in 1N HCl

Siva Prasad, Kondapalli; Srinivasa Rao, Chalamalasetti; Nageswara Rao, Damera

doi:10.22061/jcarme.2013.55

Document Type : Research Paper

Authors

¹ Assistant Professor, Department of Mechanical Engineering, Anil Neerukonda Institute of Technology & Sciences , Visakhapatnam, India

² Associate Professor, Department of Mechanical Engineering, AU College of Engineering, Andhra University, Visakhapatnam, India

³ Vice Chancellor, Centurion University of Technology & Management, Odisha, India

https://doi.org/10.22061/jcarme.2013.55

Abstract

Austenitic stainless steel sheets have gained wide acceptance in the fabrication of components, which require high temperature resistance and corrosion resistance such as metal bellows used in expansion joints in aircraft, aerospace and petroleum industries. In the case of single pass welding of thinner sections of this alloy, Pulsed Current Micro Plasma Arc Welding (PCMPAW) has been found beneficial due to its advantages over the conventional continuous current process. This paper highlighted development of empirical mathematical equations using multiple regression analysis, correlating various process parameters to pitting corrosion rates in PCMPAW of AISI 304L sheets in 1 Normal HCl. The experiments were conducted based on a five factor, five level central composite rotatable design matrix. The model adequacy was checked by Analysis of Variance (ANOVA). The main effects and interaction effects of the welding process parameters on pitting corrosion rates of the welded joints were studied using surface and contour plots. From the contour plots, it was understood that peak current was the most influencing factor on the pitting corrosion rate. The optimum pitting corrosion rate was achieved at peak current of 6 Amperes, base current of 4 Amperes, pulse rate of 40 pulses/second and pulse width of 50 % .

Keywords

20.1001.1.22287922.2013.3.1.1.7

Main Subjects

Welding

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Journal of Computational & Applied Research in Mechanical Engineering (JCARME)

Effect of welding parameters on pitting corrosion rate of pulsed current micro plasma arc welded AISI 304L sheets in 1N HCl

References

References

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Volume 3, Issue 1 - Serial Number 1
December 2013
Pages 1-11

Effect of welding parameters on pitting corrosion rate of pulsed current micro plasma arc welded AISI 304L sheets in 1N HCl

References

References

Send comment about this article

Volume 3, Issue 1 - Serial Number 1December 2013Pages 1-11

Volume 3, Issue 1 - Serial Number 1
December 2013
Pages 1-11