Correlation Between Microstructure and Pitting Corrosion Behavior of TLP Bonded DSS-2205/Ni–P/DSS-2205 Specimens

Mosallaee, Masoud; Babanejhad, Afshin

doi:10.1007/s12540-020-00625-9

Cited by 10 publications

(2 citation statements)

References 24 publications

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“…The fine precipitates in DAZ leading to better corrosion resistance compared with the large precipitates in ASZ could be due to the presence of fine precipitates with high boundaries, thereby facilitating the formation of a conducting passive layer. Thus, possibility of corrosion in this area would be lower [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

“…This was due to a change in the amount of precipitate in the joint region. Another study by Mosallaee et al [ 26 ] on the effect of the TLP of DSS-2205/Ni–P/DSS-2205 specimens by BNi-6 interlayer, demonstrates that the prior to the completion of the isothermal solidification region, the joining region was the weakest region for pitting corrosion, and the pitting attack occurred close to the rich eutectic phases (Mo, Cr, and P) in the joining region centreline. After completing the IS, the DAZ acted as the most susceptible site to pitting corrosion and the pits selectively occurred close to (Mo–P) rich intermetallic phases in the DAZ.…”

Section: Introductionmentioning

confidence: 99%

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Effect of MBF-20 Interlayer on the Microstructure and Corrosion Behaviour of Inconel 625 Super Alloy after Diffusion Brazing

et al. 2023

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The joining zone includes three main parts, which comprise an isothermal solidification zone (ISZ), the athermal solidification zone (ASZ), and a diffusion affected zone (DAZ). Field emission scanning electron microscopy (FESEM) was used here to observe the microstructure equipped with ultra-thin window energy dispersive X-ray spectrometer (EDS) system. Additionally, electrochemical impedance spectroscopy (EIS) and cyclic potentiodynamic polarization tests were conducted to evaluate the effect of the DB process on the corrosion resistance of the Inconel 625 superalloy. In the bonding time period, some Mo- and Cr-rich boride precipitations and Ni-rich γ-solid solution phases with hardened alloy elements, such as Mo and Cr, formed in DAZ and ASZ, respectively, because of the inter-diffusion of melting point depressants (MPD). Moreover, during cooling cycles, Ni-Cr-B, Ni-Mo-B, Ni-Si-B, and Ni-Si phase compounds were formed in the ASZ area at 1110–850 °C. The DAZ area developed by borides compound with cubic, needle, and grain boundary morphologies. The corrosion tests indicated that the DB process led to a reduction in the passive region and increased the sensitivity to pitting corrosion.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%