Investigation of Pitting Corrosion Rate on Micro Plasma Arc Welded Dissimilar Weld Joints of AISI 304 and AISI 430 Stainless Steel Sheets

Subject Areas : welding

Uma Maheswara Rao  G ¹ (Assistant Professor, Department of Mechanical Engineering, Anil Neerukonda Institute of Technology & Sciences, Visakhapatnam, India)
Srinivasa Rao  Chalamalasetti ² (Professor,Department of Mechanical Engineering, Andhra University, Visakhapatnam,India)

Received: 2020-04-28 Accepted : 2020-07-22 Published : 2020-09-01

Keywords: AISI 430, Micro Plasma Arc Welding, AISI 304, pitting corrosion,

Abstract :

In the present paper investigation is carried out to study pitting corrosion rate of Pulsed Current Micro Plasma Arc welded AISI304 and AISI430 dissimilar joint in three different mediums namely 0.5N NaOH, 3.5N NaCl and 0.5N HCl. Linear Polarization method is used and Tafel are drawn, from which corrosion rates are evaluated in Heat Affected Zone (HAZ) of AISI 304, AISI 430 and at Fusion zone (FZ) of the weld joint. Corrosion pits are studied using Scanning Electron Microscope (SEM) images. It is revealed that AISI 304 is subjected to more corrosion when compared to AISI 430. Corrosion rate is higher in HCl when compared to NaCl and NaOH mediums. Corrosion rate is high at FZ, than HAZ of AISI 304 and AISI 430.

References:

[1]     Missori, S., Koerber, C., Laser Beam Welding of Austenitic Ferritic Transition Joints Weld. J. Vol. 76, 1997, pp. 125.

[2]     Sireesha, M., Shankar, V., Albert S. K., and Sundaresan, S., Influence of High-Temperature Exposure On the Microstructure and Mechanical Properties of Dissimilar Metal Welds Between Modified 9Cr-1Mo Steel and Alloy 800 Mater. Sci. Eng., Vol. 292A, 2000, pp. 74–82.

[3]     Ramesh Kumar, S., Singh, A. K., and Sandeep, S., Aravind P., Investigation on Microstructural Behavior and Mechanical Properties of Plasma Arc Welded Dissimilar Butt Joint of Austenitic- Ferritic Stainless Steels, Materials Today: Proceedings, Vol. 5, 2018, pp. 8008–8015.

[4]     Madhusudan Reddy, G., Srinivasa Rao, K., Microstructure and Mechanical Properties of Similar and Dissimilar Stainless Steel Electron Beam and Friction Welds, Vol. 45, 2009, pp. 875-888.

[5]     Lokesh Kumar, G., Karthikeyan, P., Narasimma Raj, C., and Prasanna, B., George Oliver, Microstructure And Mechanical Properties Of ASS (304)-FSS (430) Dissimilar Joints In SMAW & GTAW Process, 2015, pp. 367-378.

[6]     Khana, M. M. A., Romoli, L., FiaschiA. M., Dini, B. G., and Sarri, A. F., Laser Beam Welding of Dissimilar Stainless Steels in a Fillet Joint Configuration, Journal of Materials Processing Technology, Vol. 212, 2012, pp. 856–867.

[7]     Ghorbania, S., Ghasemib, R., Ebrahimi-Kahrizsangia, R., and Hojjati-Najafabadid, A., Effect of Post Weld Heat Treatment (pwht) on the Microstructure, Mechanical Properties, and Corrosion Resistance of Dissimilar Stainless Steels, Materials Science & Engineering A, Vol. 688, 2017, pp. 470–479.

[8]     Ghasemi, R., Beidokhti, B., and Fazel-Najafabadi, M., Effect of Delta Ferrite on The Mechanical Properties of Dissimilar Ferritic-Austenitic Stainless Steel Welds, Arch. Metall. Mater., Vol. 63, 2018, pp. 437-443.

[9]     Arun Mani, A., Senthil Kumar, T., and Chandrasekar, M., Mechanical and Metallurgical Properties of Dissimilar Welded Components (AISI 430 Ferritic – AISI 304 Austenitic Stainless Steels) by CO2 Laser Beam Welding (LBW), Journal of Chemical and Pharmaceutical Sciences, Special Vol. 6, 2015, pp.35-338.

[10]  Farhood, S., Almurshdy, J. M., and Roubaiy, A. O. A., Welding of AISI 304 To AISI 430 Stainless Steel by Pulsed Nd-YAG Laser, Journal of Scientific and Engineering Research, Vol. 3, No. 1, 2016, pp. 44-50.

[11]  Madhusudhan Reddy, G., Mohandas, T., Sambasiva Rao, A., and Satyanarayana, V. V., Influence of Welding Processes On Microstructure and Mechanical Properties of Dissimilar Austenitic-Ferritic Stainless Steel Welds, Vol. 20, No. 2, 2005, pp. 147-173.

[12]  Uma Maheswara Rao, G., Srinivasa Rao, CH., Optimizing Fusion Zone Grain Size, Hardness and Tensile Strength of Pulsed Current Micro Plasma Arc Welded AISI 304 and AISI 430 dissimilar Alloy using Grey Relational Analysis, Journal of Mechanical and Mechanics Engineering, Vol. 5, No. 1, 2019, pp. 38-50.

[13]  Siva Prasad, K., Srinivasa Rao, CH., and Nageswara Rao, D., Optimizing Fusion Zone Grain Size and Ultimate Tensile Strength of Pulsed Current Micro Plasma Arc Welded Inconel 625 Alloy Sheets using Hooke & Jeeves Method, International Transaction Journal of Engineering, Management & Applied Sciences & Technologies, Vol. 3, No. 1, 2012, pp. 87-100.