Open Access Peer-reviewed Research Article

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Girija Suresh corresponding author
Hemant Kumar


The manuscript presents the results from the electrochemical noise (EN) monitoring of Inconel 82 weld overlay on Type 304L stainless steel (SS) weld in 0.01M FeCl3. The microstructure of the weld overlay obtained from optical and scanning electron microscopy (SEM) showed an austenite structure, containing equiaxed dendrites and secondary phases at the interdendritic region. Energy dispersive spectroscopy (EDS) attached to SEM revealed the secondary phases to be Nb rich Laves phase. The electrochemical potential noise was monitored using a three identical electrode configuration. The acquired signals were detrended, and wavelet analysis was employed to encode useful information from the noise transients. Visual examination of the potential noise-time record contained distinct high amplitude transients typical of localized corrosion attack. The energy distribution plots (EDP) of the potential noise derived from wavelet analysis depicted maximum relative energy on D6-D8 crystals, which represent large time scale events such as those occurring from localized attacks. Also, repassivation events too could be divulged from the potential EDP. The micrographs of the post electrochemical noise experimented specimens revealed the occurrence of localized attacks along the interdendritic region and none inside the dendritic cores. The presence of secondary phases along the interdendritic regions was found to be detrimental in chloride medium, imparting inferior localized corrosion resistance to the weld overlay.

Inconel 82 weld overlay, 304L SS weld, electrochemical noise, localized corrosion, wavelet analysis

Article Details

How to Cite
Suresh, G., & Kumar, H. (2019). Monitoring localized corrosion of Inconel 82 weld overlay on 304L SS weld by electrochemical noise. Materials Engineering Research, 1(2), 45-55.


  1. Introduction to Stainless Steels, ASM International, J.R.Davis, Davis & Associates, 1994, p110.
  2. Matsui M, Komai N, Miyazawa T, et al. Corrosion Characteristics and Mechanical Properties of Inconel 622 Weld Overlay of Waterwall Tubes in Coal Fired Boilers. Quarterly Journal of Japan Welding Society, 2009, 27(2): 149-153.
  3. Paul L, Eckhardt M, Clark G, et al. Experience with Weld Overlay and Solid Alloy Tubing Materials in Waste to Energy Plants, 12th North American Waste to Energy Conference May 17-19,Savannah, Georgia USA NAWTEC12-2216, 2004.
  4. Craig BD and Smith L. Corrosion Resistant Alloys (CRAs) in the Oil and Gas Industry, Nickel Institute Technical Series No.1 0073, September 2011, p 1-10.
  5. Celin R and Tehovnik F. Degradation of a Ni-Cr-Fe Alloy in a Pressurised-Water Nuclear Power Plant. Materials Technology, 2011, 45(2): 151-157.
  6. Riccardella PC, Hirschberg P, Anderson T, et al. The Role of Displacement-Controlled Stresses in Critical Flaw Size Determination for Piping Systems. ASME. Pressure Vessels and Piping Conference. Materials and Fabrication, Parts A and B, 2008, 6:1087-1092.
  7. Bhaduri AK, Venkadesan S, Rodriguez P, et al. Transition Metal Joints for Steam Generators-An Overview, International Journal of Pressure Vessels and Piping, 1994, 58(3) 251-265.
  8. Persaud SY, Ramamurthy S, Newman RC. The effect of weld chemistry on the oxidation of Alloy 82 dissimilar metal welds. Corrosion Science, 2015, 91: 58-67.
  9. Rathod D, Aravindan S, Singh PK, et al. Metallurgical Characterization and Diffusion Studies of Successively Buttered Deposit of Ni-Fe Alloy and Inconel on SA508 Ferritic Steel. ISIJ International, 2014, 54(8): 1866-1875.
  10. Lee HT and Kuo TY. Analysis of microstructure and mechanical properties in alloy 690 weldments using filler metals I-82 and I-52. Science and Technology of Welding and Joining, 1999, 4(2): 94-103.
  11. Hu JN, Fukahori T, Igari T, et al. An evaluation of creep rupture strength of ferritic/austenitic dissimilar weld interfaces using cohesive zone modelling. Procedia Structural Integrity, 2016, 2: 934-941.
  12. Mortezaie A, Shamanian M. An assessment of microstructure, mechanical properties and corrosion resistance of dissimilar welds between Inconel 718 and 310S austenitic stainless steel. International Journal of Pressure Vessels & Piping, 2014, 116(1): 37-46.
  13. Briant CL and Hall EL. The microstructural causes of intergranular corrosion of Alloys 82 and 182. Corrosion, 1987, 43(9): 539-548.
  14. Hanninen H, Aaltonen P, Brederholm A, et al. Dissimilar metal weld joints and their performance in nuclear power plant and oil refinery conditions. VTT research notes, 2006, 2347.
  15. Page RA and McMinn A. Relative stress corrosion susceptibilities of alloys 690 and 600 in simulated boiling water reactor environments. Metallurgical Transactions A, 1986, 17(5): 877-887.
  16. Kamachi M, Dayal RK and Gnanamoorthy JB. Corrosion studies on materials of construction for spent nuclear fuel reprocessing plant equipment. Journal of nuclear materials, 1993, 203(1): 73-82.
  17. Suresh G, Dasgupta A, Kishor P, et al. Effect of laser surface melting on the microstructure and pitting corrosion resistance of 304L SS weldment. Metallurgical and Materials Transactions B, 2017, 48(5): 2516-2525.
  18. Electrochemical noise measurement for corrosion applications. ASTM International, 1996.
  19. Cottis RA. Interpretation of electrochemical noise data. Corrosion, 2001, 57(3): 265-285.
  20. Giriga S, Mudali UK, Raju VR, et al. Electrochemical noise technique for corrosion assessment-a review[J]. Corrosion Reviews, 2005, 23(2-3): 107-170.
  21. Girija S, Nandakumar T and Mudali U K. Corrosion Behavior of Alloy 625 in Simulated Nuclear High-Level Waste Medium. Journal of Materials Engineering and Performance, 2015, 24(11): 4421-4430.
  22. Girija S and Kamachi Mudali U. Electrochemical noise resistance evaluation of 304L SS in nitric acid and simulated nuclear high level waste. Corrosion Engineering, Science and Technology, 2014, 49(5): 335-344.
  23. Girija S, Mudali UK, Khatak HS, et al. The application of electrochemical noise resistance to evaluate the corrosion resistance of AISI type 304 SS in nitric acid. corrosion science, 2007, 49(11): 4051-4068.
  24. Suresh G, Mudali UK and Raj B. Corrosion monitoring of type 304L stainless steel in nuclear near-high level waste by electrochemical noise. Journal of Applied Electrochemistry, 2011, 41(8): 973-981.
  25. Dawson JL. Electrochemical noise measurement: the definitive in-situ technique for corrosion applications? Electrochemical noise measurement for corrosion applications. ASTM International, 1996.
  26. Reichert DL. Electrochemical Noise Measurements for Determining Corrosion Rates, in: Electrochemical Noise Measurements for Corrosion Applications. ASTM Philadelphia, 1996.
  27. Girija S, Mudali UK, Raju VR, et al. Determination of corrosion types for AISI type 304L stainless steel using electrochemical noise method. Materials Science and Engineering: A, 2005, 407(1-2): 188-195.
  28. Bastos IN, Huet F, Nogueira RP, et al. Influence of aliasing in time and frequency electrochemical noise measurements. Journal of the Electrochemical Society, 2000, 147(2): 671-677.
  29. Bosch RW, Cottis RA, Csecs K, et al. Reliability of electrochemical noise measurements: Results of round-robin testing on electrochemical noise. Electrochimica Acta, 2014, 120: 379-389.
  30. Bertocci U, Huet F, Nogueira RP, et al. Drift removal procedures in the analysis of electrochemical noise. Corrosion, 2002, 58(4): 337-347.
  31. Al-Mazeedi HAA, Cottis RA. A practical evaluation of electrochemical noise parameters as indicators of corrosion type. Electrochimica Acta, 2004, 49(17-18): 2787-2793.
  32. Mansfeld F, Sun Z, Hsu CH, et al. Concerning trend removal in electrochemical noise measurements. Corrosion Science, 2001, 43(2): 341-352.
  33. Wharton JA, Wood RJK and Mellor BG. Wavelet analysis of electrochemical noise measurements during corrosion of austenitic and superduplex stainless steels in chloride media. Corrosion science, 2003, 45(1): 97-122.
  34. Aballe A, Bethencourt M, Botana F J, et al. Use of wavelets to study electrochemical noise transients. Electrochimica Acta, 2001, 46(15): 2353-2361.
  35. Shahidi M, Hosseini SMA and Jafari A H. Comparison between ED and SDPS plots as the results of wavelet transform for analyzing electrochemical noise data. Electrochimica Acta, 2011, 56(27): 9986-9997.
  36. Aballe A, Bethencourt M, Botana F J, et al. Wavelet transform-based analysis for electrochemical noise. Electrochemistry communications, 1999, 1(7): 266-270.
  37. Aballe A, Bethencourt M, Botana F J, et al. Using wavelets transform in the analysis of electrochemical noise data. Electrochimica Acta, 1999, 44(26): 4805-4816.
  38. Malamud BD and Turcotte DL. Self-affine time series: measures of weak and strong persistence. Journal of statistical planning and inference, 1999, 80(1-2): 173-196.
  39. Mohsenifar F and Jafari AH. Comparison of Energy of Wavelet Coefficients as a Useful Tool for Interpreting of EN Data. App Math in Eng Manag Tech, 2015, 3(1): 794 -804.
  40. Smith MT and Macdonald DD. Wavelet Analysis of Electrochemical Noise Data. Corrosion, 2009, 65(7): 438-448.
  41. Lippold JC, Kiser SD and DuPont JN. Welding Metallurgy and weldability of Nickel base alloys, Microstructural Evolution in the Fusion Zone, p57.
  42. Lee J, Jang CH, Kim JS, et al. Mechanical Properties Evaluation in Inconel 82/182 Dissimilar Metal Welds. Transactions of SMiRT, 2007, 19.
  43. Sireesha M, Albert SK, Shankar V, et al. A comparative evaluation of welding consumables for dissimilar welds between 316LN austenitic stainless steel and Alloy 800. Journal of Nuclear Materials, 2000, 279(1): 65-76.
  44. Naffakh H, Shamanian M and Ashrafizadeh F. Dissimilar welding of AISI 310 austenitic stainless steel to nickel-based alloy Inconel 657. Journal of materials processing technology, 2009, 209(7): 3628-3639.
  45. DuPont JN and Robino CV. The influence of Nb and C on the solidification microstructures of Fe-Ni-Cr alloys. Scripta materialia, 1999, 41(4): 449-454.
  46. Terry MT, Edgemon GL, Mickalonis J I, et al. Development and deployment of advanced corrosion monitoring systems for high-level waste tanks. Los Alamos National Laboratory PO Box 1663, Los Alamos, NM (US); HiLine Engineering and Fabrication 2105 Aviator Dr., Richland, WA; Westinghouse Savannah River Company Savannah River Technology Center, Aiken, SC; Idaho National Engineering and Environmental Laboratory PO Box 1625, Idaho Falls, ID (US), 2002.
  47. Roberge PR, Beaudoin R and Sastri VS. Electrochemical noise measurements for field applications. Corrosion science, 1989, 29(10): 1231-1233.
  48. Hladky K and Dawson JL. The measurement of localized corrosion using electrochemical noise. Corrosion Science, 1981, 21(4): 317-322.
  49. Samantaroy PK, Suresh G, Paul R, et al. Corrosion behavior of Alloy 690 and Alloy 693 in simulated nuclear high level waste medium. Journal of Nuclear Materials, 2011, 418(1-3): 27-37.
  50. Gabrielli C and Keddam M. Review of applications of impedance and noise analysis to uniform and localized corrosion. Corrosion, 1992, 48(10): 794-811.
  51. Cheng YF, Luo JL and Wilmott M. Spectral analysis of electrochemical noise with different transient shapes. Electrochimica Acta, 2000, 45(11): 1763-1771.
  52. Wang X, Wang J, Fu C, et al. Determination of corrosion type by wavelet-based fractal dimension from electrochemical noise. International Journal of Electrochemical Science, 2013, 8: 7211-7222.
  53. Suresh G and Mudali U K. Electrochemical noise analysis of pitting corrosion of type 304L stainless steel. Corrosion, 2013, 70(3): 283-293.
  54. Smith MT and Macdonald DD. Wavelet analysis of electrochemical noise data. Corrosion, 2009, 65(7): 438-448.
  55. Attarchi M, Roshan MS, Norouzi S, et al. Electrochemical potential noise analysis of Cu–BTA system using wavelet transformation. Journal of Electroanalytical Chemistry, 2009, 633(1): 240-245.
  56. Davoodi A, Pan J, Leygraf C, et al. Integrated AFM and SECM for in situ studies of localized corrosion of Al alloys. Electrochimica Acta, 2007, 52(27): 7697-7705.
  57. Liu L, Li Y and Wang F. Pitting mechanism on an austenite stainless steel nanocrystalline coating investigated by electrochemical noise and in-situ AFM analysis. Electrochimica Acta, 2008, 54(2): 768-780.
  58. Zhang Z, Leng WH, Cai QY, et al. Study of the zinc electroplating process using electrochemical noise technique. Journal of electroanalytical Chemistry, 2005, 578(2): 357-367.
  59. Cao FH, Zhang Z, Su JX, et al. Electrochemical noise analysis of LY12-T3 in EXCO solution by discrete wavelet transform technique. Electrochimica Acta, 2006, 51(7): 1359-1364.
  60. Shahidi M, Hosseini SMA, Jafari AH. Comparison between ED and SDPS plots as the results of wavelet transform for analyzing electrochemical noise data. Electrochimica Acta, 2011, 56(27): 9986-9997.
  61. Seo M, Hultquist G, Leygraf C, et al. The influence of minor alloying elements (Nb, Ti and Cu) on the corrosion resistivity of ferritic stainless steel in sulfuric acid solution. Corrosion Science, 1986, 26(11): 949-960.