A study on the applicability of Si in low-Mo duplex stainless steel weld metals to improve the corrosion resistance. (February 2015)

• Record Type: Journal Article
• Authors: Kim, Sung Jin; Kim, Jeong Kil; Park, Sang-Hong
• Is Part Of: Scripta materialia. Volume 96(2015)
• Page Start: 33
• Page End: 36
• Publication Date: 2015-02
• Subjects: Welding -- Secondary ion mass spectroscopy -- Stainless steels -- Corrosion -- Silicon; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.10.017
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : The applicability of Si in low-Mo duplex stainless steel weld metals is examined in terms of corrosion resistance and impact toughness. Nano-secondary ion mass spectrometry and three-dimensional atom probe analysis indicate that Si is enriched at the outermost layer in the form of Si-oxide a few nanometer thick, leading to a significant increase in critical pitting temperature without sacrificing the impact toughness. Improved corrosion resistance suggests that the thin oxide layer possibly acts as a diffusion barrier against aggressive ionic species.